---
_id: '62079'
abstract:
- lang: eng
  text: This paper investigates two modeling approaches for the simulation of the
    deformation and decomposition behavior of preconsolidated rovings above the thermoplastic
    matrix{\textquoteright} melting temperature. This is crucial for capturing the
    local material structure after processes introducing highly localized deformation
    such as mechanical joining processes between metal and fiber reinforced thermoplastics
    (FRTP). A generic finite element (FE) model is developed, incorporating interfaces
    discretized through either cohesive zone (CZ) elements or Coulomb friction-based
    contacts. The material parameters for the FE elements are derived from the initial
    stiffness of a statistical volume element (SVE) at micro scale modelled with an
    Arbitrary-Lagrange-Eulerian method for three load cases. The CZ properties calculated
    are based on the shear viscosity of the composite. The CZ and contact modelling
    approaches are evaluated using three load cases of the SVE, comparing force-displacement
    curves. Under simple loading conditions, such as normal pressure tension and bending,
    both methods produce similar results; however, in complex load cases, the CZ approach
    shows clear advantages in handling interface interactions and shows robust simulations.
    The CZ approach thus presents a promising method for simulating roving decomposition
    in FRTP-metal joining applications above the matrix{\textquoteright} melting temperature.
author:
- first_name: Benjamin
  full_name: Gröger, Benjamin
  last_name: Gröger
- first_name: Johannes
  full_name: Gerritzen, Johannes
  id: '105344'
  last_name: Gerritzen
  orcid: 0000-0002-0169-8602
- first_name: Andreas
  full_name: Hornig, Andreas
  last_name: Hornig
- first_name: Maik
  full_name: Gude, Maik
  last_name: Gude
citation:
  ama: 'Gröger B, Gerritzen J, Hornig A, Gude M. Modeling approaches for the decomposition
    behavior of preconsolidated rovings throughout local deformation processes. In:
    Meschut G, Bobbert M, Duflou J, et al., eds. <i>Sheet Metal 2025</i>. Materials
    Research Proceedings. Materials Research Forum LLC, Materials Research Foundations;
    2025:268–275. doi:<a href="https://doi.org/10.21741/9781644903551-33">10.21741/9781644903551-33</a>'
  apa: Gröger, B., Gerritzen, J., Hornig, A., &#38; Gude, M. (2025). Modeling approaches
    for the decomposition behavior of preconsolidated rovings throughout local deformation
    processes. In G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins,
    M. Merklein, &#38; F. Micari (Eds.), <i>Sheet Metal 2025</i> (pp. 268–275). Materials
    Research Forum LLC, Materials Research Foundations. <a href="https://doi.org/10.21741/9781644903551-33">https://doi.org/10.21741/9781644903551-33</a>
  bibtex: '@inproceedings{Gröger_Gerritzen_Hornig_Gude_2025, series={Materials Research
    Proceedings}, title={Modeling approaches for the decomposition behavior of preconsolidated
    rovings throughout local deformation processes}, DOI={<a href="https://doi.org/10.21741/9781644903551-33">10.21741/9781644903551-33</a>},
    booktitle={Sheet Metal 2025}, publisher={Materials Research Forum LLC, Materials
    Research Foundations}, author={Gröger, Benjamin and Gerritzen, Johannes and Hornig,
    Andreas and Gude, Maik}, editor={Meschut, G. and Bobbert, M. and Duflou, J. and
    Fratini, L. and Hagenah, H. and Martins, P. and Merklein, M. and Micari, F.},
    year={2025}, pages={268–275}, collection={Materials Research Proceedings} }'
  chicago: Gröger, Benjamin, Johannes Gerritzen, Andreas Hornig, and Maik Gude. “Modeling
    Approaches for the Decomposition Behavior of Preconsolidated Rovings throughout
    Local Deformation Processes.” In <i>Sheet Metal 2025</i>, edited by G. Meschut,
    M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, and F.
    Micari, 268–275. Materials Research Proceedings. Materials Research Forum LLC,
    Materials Research Foundations, 2025. <a href="https://doi.org/10.21741/9781644903551-33">https://doi.org/10.21741/9781644903551-33</a>.
  ieee: 'B. Gröger, J. Gerritzen, A. Hornig, and M. Gude, “Modeling approaches for
    the decomposition behavior of preconsolidated rovings throughout local deformation
    processes,” in <i>Sheet Metal 2025</i>, 2025, pp. 268–275, doi: <a href="https://doi.org/10.21741/9781644903551-33">10.21741/9781644903551-33</a>.'
  mla: Gröger, Benjamin, et al. “Modeling Approaches for the Decomposition Behavior
    of Preconsolidated Rovings throughout Local Deformation Processes.” <i>Sheet Metal
    2025</i>, edited by G. Meschut et al., Materials Research Forum LLC, Materials
    Research Foundations, 2025, pp. 268–275, doi:<a href="https://doi.org/10.21741/9781644903551-33">10.21741/9781644903551-33</a>.
  short: 'B. Gröger, J. Gerritzen, A. Hornig, M. Gude, in: G. Meschut, M. Bobbert,
    J. Duflou, L. Fratini, H. Hagenah, P. Martins, M. Merklein, F. Micari (Eds.),
    Sheet Metal 2025, Materials Research Forum LLC, Materials Research Foundations,
    2025, pp. 268–275.'
date_created: 2025-11-04T12:48:21Z
date_updated: 2026-02-27T06:43:19Z
doi: 10.21741/9781644903551-33
editor:
- first_name: G.
  full_name: Meschut, G.
  last_name: Meschut
- first_name: M.
  full_name: Bobbert, M.
  last_name: Bobbert
- first_name: J.
  full_name: Duflou, J.
  last_name: Duflou
- first_name: L.
  full_name: Fratini, L.
  last_name: Fratini
- first_name: H.
  full_name: Hagenah, H.
  last_name: Hagenah
- first_name: P.
  full_name: Martins, P.
  last_name: Martins
- first_name: M.
  full_name: Merklein, M.
  last_name: Merklein
- first_name: F.
  full_name: Micari, F.
  last_name: Micari
keyword:
- Finite Element Method (FEM)
- Process
- Thermoplastic Fiber Reinforced Plastic
language:
- iso: eng
page: 268–275
project:
- _id: '130'
  name: 'TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
    Prozessketten'
- _id: '137'
  name: TRR 285 - Subproject A03
- _id: '131'
  name: TRR 285 - Project Area A
publication: Sheet Metal 2025
publication_identifier:
  isbn:
  - 978-1-64490-354-4
publisher: Materials Research Forum LLC, Materials Research Foundations
series_title: Materials Research Proceedings
status: public
title: Modeling approaches for the decomposition behavior of preconsolidated rovings
  throughout local deformation processes
type: conference
user_id: '105344'
year: '2025'
...
---
_id: '62080'
abstract:
- lang: eng
  text: The failure behavior of fiber reinforced polymers (FRP) is strongly influenced
    by their microstructure, i.e. fiber arrangement or local fiber volume content.
    However, this information cannot be directly used for structural analyses, since
    it requires a discretization on micrometer level. Therefore, current failure theories
    do not directly account for such effects, but describe the behavior averaged over
    an entire specimen. This foundation in experimentally accessible loading conditions
    leads to purely theory based extension to more complex stress states without direct
    validation possibilities. This work aims at leveraging micro-scale simulations
    to obtain failure information under arbitrary loading conditions. The results
    are propagated to the meso-scale, enabling efficient structural analyses, by means
    of machine learning (ML). It is shown that the ML model is capable of correctly
    assessing previously unseen stress states and therefore poses an efficient tool
    of exploiting information from the micro-scale in larger simulations.
author:
- first_name: Johannes
  full_name: Gerritzen, Johannes
  id: '105344'
  last_name: Gerritzen
  orcid: 0000-0002-0169-8602
- first_name: Andreas
  full_name: Hornig, Andreas
  last_name: Hornig
- first_name: Maik
  full_name: Gude, Maik
  last_name: Gude
citation:
  ama: 'Gerritzen J, Hornig A, Gude M. Efficient failure information propagation under
    complex stress states in fiber reinforced polymers: From micro- to meso-scale
    using machine learning. In: Meschut G, Bobbert M, Duflou J, et al., eds. <i>Sheet
    Metal 2025</i>. Materials Research Proceedings. Materials Research Forum LLC,
    Materials Research Foundations; 2025:260–267. doi:<a href="https://doi.org/10.21741/9781644903551-32">10.21741/9781644903551-32</a>'
  apa: 'Gerritzen, J., Hornig, A., &#38; Gude, M. (2025). Efficient failure information
    propagation under complex stress states in fiber reinforced polymers: From micro-
    to meso-scale using machine learning. In G. Meschut, M. Bobbert, J. Duflou, L.
    Fratini, H. Hagenah, P. Martins, M. Merklein, &#38; F. Micari (Eds.), <i>Sheet
    Metal 2025</i> (pp. 260–267). Materials Research Forum LLC, Materials Research
    Foundations. <a href="https://doi.org/10.21741/9781644903551-32">https://doi.org/10.21741/9781644903551-32</a>'
  bibtex: '@inproceedings{Gerritzen_Hornig_Gude_2025, series={Materials Research Proceedings},
    title={Efficient failure information propagation under complex stress states in
    fiber reinforced polymers: From micro- to meso-scale using machine learning},
    DOI={<a href="https://doi.org/10.21741/9781644903551-32">10.21741/9781644903551-32</a>},
    booktitle={Sheet Metal 2025}, publisher={Materials Research Forum LLC, Materials
    Research Foundations}, author={Gerritzen, Johannes and Hornig, Andreas and Gude,
    Maik}, editor={Meschut, G. and Bobbert, M. and Duflou, J. and Fratini, L. and
    Hagenah, H. and Martins, P. and Merklein, M. and Micari, F.}, year={2025}, pages={260–267},
    collection={Materials Research Proceedings} }'
  chicago: 'Gerritzen, Johannes, Andreas Hornig, and Maik Gude. “Efficient Failure
    Information Propagation under Complex Stress States in Fiber Reinforced Polymers:
    From Micro- to Meso-Scale Using Machine Learning.” In <i>Sheet Metal 2025</i>,
    edited by G. Meschut, M. Bobbert, J. Duflou, L. Fratini, H. Hagenah, P. Martins,
    M. Merklein, and F. Micari, 260–267. Materials Research Proceedings. Materials
    Research Forum LLC, Materials Research Foundations, 2025. <a href="https://doi.org/10.21741/9781644903551-32">https://doi.org/10.21741/9781644903551-32</a>.'
  ieee: 'J. Gerritzen, A. Hornig, and M. Gude, “Efficient failure information propagation
    under complex stress states in fiber reinforced polymers: From micro- to meso-scale
    using machine learning,” in <i>Sheet Metal 2025</i>, 2025, pp. 260–267, doi: <a
    href="https://doi.org/10.21741/9781644903551-32">10.21741/9781644903551-32</a>.'
  mla: 'Gerritzen, Johannes, et al. “Efficient Failure Information Propagation under
    Complex Stress States in Fiber Reinforced Polymers: From Micro- to Meso-Scale
    Using Machine Learning.” <i>Sheet Metal 2025</i>, edited by G. Meschut et al.,
    Materials Research Forum LLC, Materials Research Foundations, 2025, pp. 260–267,
    doi:<a href="https://doi.org/10.21741/9781644903551-32">10.21741/9781644903551-32</a>.'
  short: 'J. Gerritzen, A. Hornig, M. Gude, in: G. Meschut, M. Bobbert, J. Duflou,
    L. Fratini, H. Hagenah, P. Martins, M. Merklein, F. Micari (Eds.), Sheet Metal
    2025, Materials Research Forum LLC, Materials Research Foundations, 2025, pp.
    260–267.'
date_created: 2025-11-04T12:48:37Z
date_updated: 2026-02-27T06:43:37Z
doi: 10.21741/9781644903551-32
editor:
- first_name: G.
  full_name: Meschut, G.
  last_name: Meschut
- first_name: M.
  full_name: Bobbert, M.
  last_name: Bobbert
- first_name: J.
  full_name: Duflou, J.
  last_name: Duflou
- first_name: L.
  full_name: Fratini, L.
  last_name: Fratini
- first_name: H.
  full_name: Hagenah, H.
  last_name: Hagenah
- first_name: P.
  full_name: Martins, P.
  last_name: Martins
- first_name: M.
  full_name: Merklein, M.
  last_name: Merklein
- first_name: F.
  full_name: Micari, F.
  last_name: Micari
keyword:
- Failure
- Fiber Reinforced Plastic
- Machine Learning
language:
- iso: eng
page: 260–267
project:
- _id: '130'
  name: 'TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
    Prozessketten'
- _id: '137'
  name: TRR 285 - Subproject A03
- _id: '131'
  name: TRR 285 - Project Area A
publication: Sheet Metal 2025
publication_identifier:
  isbn:
  - 978-1-64490-354-4
publisher: Materials Research Forum LLC, Materials Research Foundations
series_title: Materials Research Proceedings
status: public
title: 'Efficient failure information propagation under complex stress states in fiber
  reinforced polymers: From micro- to meso-scale using machine learning'
type: conference
user_id: '105344'
year: '2025'
...
---
_id: '62081'
article_number: '114969'
author:
- first_name: Johannes
  full_name: Gerritzen, Johannes
  id: '105344'
  last_name: Gerritzen
  orcid: 0000-0002-0169-8602
- first_name: Benjamin
  full_name: Gröger, Benjamin
  last_name: Gröger
- first_name: Matthias
  full_name: Zscheyge, Matthias
  last_name: Zscheyge
- first_name: Andreas
  full_name: Hornig, Andreas
  last_name: Hornig
- first_name: Maik
  full_name: Gude, Maik
  last_name: Gude
citation:
  ama: Gerritzen J, Gröger B, Zscheyge M, Hornig A, Gude M. 3D viscoelastic plastic
    model coupled with a continuum damage formulation for fiber reinforced polymers.
    <i>Materials &#38;amp; Design</i>. 2025;260. doi:<a href="https://doi.org/10.1016/j.matdes.2025.114969">10.1016/j.matdes.2025.114969</a>
  apa: Gerritzen, J., Gröger, B., Zscheyge, M., Hornig, A., &#38; Gude, M. (2025).
    3D viscoelastic plastic model coupled with a continuum damage formulation for
    fiber reinforced polymers. <i>Materials &#38;amp; Design</i>, <i>260</i>, Article
    114969. <a href="https://doi.org/10.1016/j.matdes.2025.114969">https://doi.org/10.1016/j.matdes.2025.114969</a>
  bibtex: '@article{Gerritzen_Gröger_Zscheyge_Hornig_Gude_2025, title={3D viscoelastic
    plastic model coupled with a continuum damage formulation for fiber reinforced
    polymers}, volume={260}, DOI={<a href="https://doi.org/10.1016/j.matdes.2025.114969">10.1016/j.matdes.2025.114969</a>},
    number={114969}, journal={Materials &#38;amp; Design}, publisher={Elsevier BV},
    author={Gerritzen, Johannes and Gröger, Benjamin and Zscheyge, Matthias and Hornig,
    Andreas and Gude, Maik}, year={2025} }'
  chicago: Gerritzen, Johannes, Benjamin Gröger, Matthias Zscheyge, Andreas Hornig,
    and Maik Gude. “3D Viscoelastic Plastic Model Coupled with a Continuum Damage
    Formulation for Fiber Reinforced Polymers.” <i>Materials &#38;amp; Design</i>
    260 (2025). <a href="https://doi.org/10.1016/j.matdes.2025.114969">https://doi.org/10.1016/j.matdes.2025.114969</a>.
  ieee: 'J. Gerritzen, B. Gröger, M. Zscheyge, A. Hornig, and M. Gude, “3D viscoelastic
    plastic model coupled with a continuum damage formulation for fiber reinforced
    polymers,” <i>Materials &#38;amp; Design</i>, vol. 260, Art. no. 114969, 2025,
    doi: <a href="https://doi.org/10.1016/j.matdes.2025.114969">10.1016/j.matdes.2025.114969</a>.'
  mla: Gerritzen, Johannes, et al. “3D Viscoelastic Plastic Model Coupled with a Continuum
    Damage Formulation for Fiber Reinforced Polymers.” <i>Materials &#38;amp; Design</i>,
    vol. 260, 114969, Elsevier BV, 2025, doi:<a href="https://doi.org/10.1016/j.matdes.2025.114969">10.1016/j.matdes.2025.114969</a>.
  short: J. Gerritzen, B. Gröger, M. Zscheyge, A. Hornig, M. Gude, Materials &#38;amp;
    Design 260 (2025).
date_created: 2025-11-04T12:49:13Z
date_updated: 2026-02-27T06:43:55Z
doi: 10.1016/j.matdes.2025.114969
intvolume: '       260'
language:
- iso: eng
project:
- _id: '130'
  name: 'TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
    Prozessketten'
- _id: '137'
  name: TRR 285 - Subproject A03
- _id: '131'
  name: TRR 285 - Project Area A
publication: Materials &amp; Design
publication_identifier:
  issn:
  - 0264-1275
publication_status: published
publisher: Elsevier BV
status: public
title: 3D viscoelastic plastic model coupled with a continuum damage formulation for
  fiber reinforced polymers
type: journal_article
user_id: '105344'
volume: 260
year: '2025'
...
---
_id: '64770'
author:
- first_name: Matthieu
  full_name: Pinaud, Matthieu
  last_name: Pinaud
citation:
  ama: Pinaud M. <i>Manifold of Mappings and Regularity Properties of Half-Lie Groups</i>.;
    2025. doi:<a href="https://doi.org/10.17619/UNIPB/1-2211">10.17619/UNIPB/1-2211</a>
  apa: Pinaud, M. (2025). <i>Manifold of mappings and regularity properties of half-Lie
    groups</i>. <a href="https://doi.org/10.17619/UNIPB/1-2211">https://doi.org/10.17619/UNIPB/1-2211</a>
  bibtex: '@book{Pinaud_2025, title={Manifold of mappings and regularity properties
    of half-Lie groups}, DOI={<a href="https://doi.org/10.17619/UNIPB/1-2211">10.17619/UNIPB/1-2211</a>},
    author={Pinaud, Matthieu}, year={2025} }'
  chicago: Pinaud, Matthieu. <i>Manifold of Mappings and Regularity Properties of
    Half-Lie Groups</i>, 2025. <a href="https://doi.org/10.17619/UNIPB/1-2211">https://doi.org/10.17619/UNIPB/1-2211</a>.
  ieee: M. Pinaud, <i>Manifold of mappings and regularity properties of half-Lie groups</i>.
    2025.
  mla: Pinaud, Matthieu. <i>Manifold of Mappings and Regularity Properties of Half-Lie
    Groups</i>. 2025, doi:<a href="https://doi.org/10.17619/UNIPB/1-2211">10.17619/UNIPB/1-2211</a>.
  short: M. Pinaud, Manifold of Mappings and Regularity Properties of Half-Lie Groups,
    2025.
date_created: 2026-02-26T21:58:22Z
date_updated: 2026-02-26T21:58:36Z
department:
- _id: '10'
- _id: '87'
- _id: '93'
doi: 10.17619/UNIPB/1-2211
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://nbn-resolving.org/urn:nbn:de:hbz:466:2-54221
oa: '1'
status: public
supervisor:
- first_name: Helge
  full_name: Glöckner, Helge
  id: '178'
  last_name: Glöckner
title: Manifold of mappings and regularity properties of half-Lie groups
type: dissertation
user_id: '178'
year: '2025'
...
---
_id: '61149'
abstract:
- lang: eng
  text: The use of continuous fiber-reinforced thermoplastics (FRTP) in automotive
    industry increases due to their excellent material properties and possibility
    of rapid processing. The scale spanning heterogeneity of their material structure
    and its influence on the material behavior, however, presents significant challenges
    for most joining technologies, such as self-piercing riveting (SPR). During mechanical
    joining, the material structure is significantly altered within and around the
    joining zone, heavily influencing the material behavior. A comprehensive understanding
    of the underlying phenomena of material alteration during the SPR process is essential
    as basis for validating numerical simulations. This study examines the material
    structure at ten stages of a step-setting test of SPR with two FRTP sheets with
    glass-fiber reinforcement. Utilizing X-ray computed tomography (CT), the damage
    phenomena within different areas of the setting test are analyzed three-dimensionally
    and key parameters are quantified. Dominating phenomena during the penetration
    of the rivet into the laminate are fiber failure (FF), interfiber failure (IFF)
    and fiber bending, while delamination, fiber kinking and roving splitting are
    also observed. At the final stages, the bottom layers of the second sheet collapse
    and form a bulge into the cavity of the die.
author:
- first_name: Alrik
  full_name: Dargel, Alrik
  id: '114764'
  last_name: Dargel
- first_name: Benjamin
  full_name: Gröger, Benjamin
  last_name: Gröger
- first_name: Malte Christian
  full_name: Schlichter, Malte Christian
  id: '61977'
  last_name: Schlichter
- first_name: Johannes
  full_name: Gerritzen, Johannes
  id: '105344'
  last_name: Gerritzen
  orcid: 0000-0002-0169-8602
- first_name: Daniel
  full_name: Köhler, Daniel
  id: '83408'
  last_name: Köhler
- first_name: Gerson
  full_name: Meschut, Gerson
  id: '32056'
  last_name: Meschut
  orcid: 0000-0002-2763-1246
- first_name: Maik
  full_name: Gude, Maik
  last_name: Gude
- first_name: Robert
  full_name: Kupfer, Robert
  last_name: Kupfer
citation:
  ama: 'Dargel A, Gröger B, Schlichter MC, et al. LOCAL DEFORMATION AND FAILURE OF
    COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.
    In: Gomes JFS, Meguid SA, eds. <i>Proceedings of the 8th International Conference
    on Integrity-Reliability-Failure (IRF2025)</i>. FEUP; 2025. doi:<a href="https://doi.org/10.24840/978-972-752-323-8">10.24840/978-972-752-323-8</a>'
  apa: 'Dargel, A., Gröger, B., Schlichter, M. C., Gerritzen, J., Köhler, D., Meschut,
    G., Gude, M., &#38; Kupfer, R. (2025). LOCAL DEFORMATION AND FAILURE OF COMPOSITES
    DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION. In J.
    F. S. Gomes &#38; S. A. Meguid (Eds.), <i>Proceedings of the 8th International
    Conference on Integrity-Reliability-Failure (IRF2025)</i>. FEUP. <a href="https://doi.org/10.24840/978-972-752-323-8">https://doi.org/10.24840/978-972-752-323-8</a>'
  bibtex: '@inproceedings{Dargel_Gröger_Schlichter_Gerritzen_Köhler_Meschut_Gude_Kupfer_2025,
    place={Porto}, title={LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING
    RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION}, DOI={<a href="https://doi.org/10.24840/978-972-752-323-8">10.24840/978-972-752-323-8</a>},
    booktitle={Proceedings of the 8th International Conference on Integrity-Reliability-Failure
    (IRF2025)}, publisher={FEUP}, author={Dargel, Alrik and Gröger, Benjamin and Schlichter,
    Malte Christian and Gerritzen, Johannes and Köhler, Daniel and Meschut, Gerson
    and Gude, Maik and Kupfer, Robert}, editor={Gomes, J.F. Silva and Meguid, Shaker
    A.}, year={2025} }'
  chicago: 'Dargel, Alrik, Benjamin Gröger, Malte Christian Schlichter, Johannes Gerritzen,
    Daniel Köhler, Gerson Meschut, Maik Gude, and Robert Kupfer. “LOCAL DEFORMATION
    AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE
    INVESTIGATION.” In <i>Proceedings of the 8th International Conference on Integrity-Reliability-Failure
    (IRF2025)</i>, edited by J.F. Silva Gomes and Shaker A. Meguid. Porto: FEUP, 2025.
    <a href="https://doi.org/10.24840/978-972-752-323-8">https://doi.org/10.24840/978-972-752-323-8</a>.'
  ieee: 'A. Dargel <i>et al.</i>, “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING
    SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION,” in <i>Proceedings
    of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>,
    Porto, 2025, doi: <a href="https://doi.org/10.24840/978-972-752-323-8">10.24840/978-972-752-323-8</a>.'
  mla: 'Dargel, Alrik, et al. “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING
    SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.” <i>Proceedings
    of the 8th International Conference on Integrity-Reliability-Failure (IRF2025)</i>,
    edited by J.F. Silva Gomes and Shaker A. Meguid, FEUP, 2025, doi:<a href="https://doi.org/10.24840/978-972-752-323-8">10.24840/978-972-752-323-8</a>.'
  short: 'A. Dargel, B. Gröger, M.C. Schlichter, J. Gerritzen, D. Köhler, G. Meschut,
    M. Gude, R. Kupfer, in: J.F.S. Gomes, S.A. Meguid (Eds.), Proceedings of the 8th
    International Conference on Integrity-Reliability-Failure (IRF2025), FEUP, Porto,
    2025.'
conference:
  end_date: 2025-07-18
  location: Porto
  name: 8th International Conference on Integrity-Reliability-Failure (IRF2025)
  start_date: 2025-07-15
date_created: 2025-09-08T11:52:45Z
date_updated: 2026-02-27T06:45:17Z
doi: 10.24840/978-972-752-323-8
editor:
- first_name: J.F. Silva
  full_name: Gomes, J.F. Silva
  last_name: Gomes
- first_name: Shaker A.
  full_name: Meguid, Shaker A.
  last_name: Meguid
keyword:
- self-piercing riveting
- computed tomography
- thermoplastic composites
- process-structure-interaction
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.researchgate.net/publication/395593556_LOCAL_DEFORMATION_AND_FAILURE_OF_COMPOSITES_DURING_SELF-PIERCING_RIVETING_A_CT_BASED_MICROSTRUCTURE_INVESTIGATION
oa: '1'
place: Porto
project:
- _id: '133'
  name: TRR 285 - Project Area C
- _id: '148'
  name: TRR 285 - Subproject C04
- _id: '130'
  name: 'TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
    Prozessketten'
- _id: '131'
  name: TRR 285 - Project Area A
- _id: '137'
  name: TRR 285 - Subproject A03
- _id: '135'
  name: TRR 285 - Subproject A01
publication: Proceedings of the 8th International Conference on Integrity-Reliability-Failure
  (IRF2025)
publication_identifier:
  isbn:
  - '9789727523238'
publication_status: published
publisher: FEUP
status: public
title: 'LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING:
  A CT BASED MICROSTRUCTURE INVESTIGATION'
type: conference
user_id: '105344'
year: '2025'
...
---
_id: '63828'
article_number: '100368'
author:
- first_name: Johannes
  full_name: Gerritzen, Johannes
  id: '105344'
  last_name: Gerritzen
  orcid: 0000-0002-0169-8602
- first_name: Kunal
  full_name: Chopra, Kunal
  last_name: Chopra
- first_name: Gregor
  full_name: Reschke, Gregor
  id: '98812'
  last_name: Reschke
- first_name: Andreas
  full_name: Hornig, Andreas
  last_name: Hornig
- first_name: Alexander
  full_name: Brosius, Alexander
  last_name: Brosius
- first_name: Maik
  full_name: Gude, Maik
  last_name: Gude
citation:
  ama: Gerritzen J, Chopra K, Reschke G, Hornig A, Brosius A, Gude M. Quality assurance
    of clinched joints using explainable machine learning. <i>Journal of Advanced
    Joining Processes</i>. 2025;13. doi:<a href="https://doi.org/10.1016/j.jajp.2025.100368">10.1016/j.jajp.2025.100368</a>
  apa: Gerritzen, J., Chopra, K., Reschke, G., Hornig, A., Brosius, A., &#38; Gude,
    M. (2025). Quality assurance of clinched joints using explainable machine learning.
    <i>Journal of Advanced Joining Processes</i>, <i>13</i>, Article 100368. <a href="https://doi.org/10.1016/j.jajp.2025.100368">https://doi.org/10.1016/j.jajp.2025.100368</a>
  bibtex: '@article{Gerritzen_Chopra_Reschke_Hornig_Brosius_Gude_2025, title={Quality
    assurance of clinched joints using explainable machine learning}, volume={13},
    DOI={<a href="https://doi.org/10.1016/j.jajp.2025.100368">10.1016/j.jajp.2025.100368</a>},
    number={100368}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
    BV}, author={Gerritzen, Johannes and Chopra, Kunal and Reschke, Gregor and Hornig,
    Andreas and Brosius, Alexander and Gude, Maik}, year={2025} }'
  chicago: Gerritzen, Johannes, Kunal Chopra, Gregor Reschke, Andreas Hornig, Alexander
    Brosius, and Maik Gude. “Quality Assurance of Clinched Joints Using Explainable
    Machine Learning.” <i>Journal of Advanced Joining Processes</i> 13 (2025). <a
    href="https://doi.org/10.1016/j.jajp.2025.100368">https://doi.org/10.1016/j.jajp.2025.100368</a>.
  ieee: 'J. Gerritzen, K. Chopra, G. Reschke, A. Hornig, A. Brosius, and M. Gude,
    “Quality assurance of clinched joints using explainable machine learning,” <i>Journal
    of Advanced Joining Processes</i>, vol. 13, Art. no. 100368, 2025, doi: <a href="https://doi.org/10.1016/j.jajp.2025.100368">10.1016/j.jajp.2025.100368</a>.'
  mla: Gerritzen, Johannes, et al. “Quality Assurance of Clinched Joints Using Explainable
    Machine Learning.” <i>Journal of Advanced Joining Processes</i>, vol. 13, 100368,
    Elsevier BV, 2025, doi:<a href="https://doi.org/10.1016/j.jajp.2025.100368">10.1016/j.jajp.2025.100368</a>.
  short: J. Gerritzen, K. Chopra, G. Reschke, A. Hornig, A. Brosius, M. Gude, Journal
    of Advanced Joining Processes 13 (2025).
date_created: 2026-02-02T08:32:04Z
date_updated: 2026-02-27T06:45:47Z
doi: 10.1016/j.jajp.2025.100368
intvolume: '        13'
language:
- iso: eng
project:
- _id: '137'
  name: TRR 285 - Subproject A03
- _id: '131'
  name: TRR 285 - Project Area A
- _id: '130'
  name: 'TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
    Prozessketten'
- _id: '133'
  name: TRR 285 - Project Area C
- _id: '148'
  name: TRR 285 - Subproject C04
publication: Journal of Advanced Joining Processes
publication_identifier:
  issn:
  - 2666-3309
publication_status: published
publisher: Elsevier BV
status: public
title: Quality assurance of clinched joints using explainable machine learning
type: journal_article
user_id: '105344'
volume: 13
year: '2025'
...
---
_id: '59441'
abstract:
- lang: eng
  text: '<jats:p>Abstract. Accurate Finite Element Modeling (FEM) of joints is essential
    in the design of complex mechanical systems such as automotive body-in-white (BIW)
    structures, as it plays a critical role in evaluating their performance. Although
    well-established techniques exist for modeling rotationally symmetric joints,
    there remains a significant gap in effectively modeling non-rotationally symmetric
    joints. These joints are particularly relevant in the automotive BIW, where they
    can better accommodate anisotropic loading conditions. In this study, strategies
    for modeling non-rotationally symmetric joints were explored using finite element
    simulations in LS-DYNA. The findings demonstrate that discrete beam elements can
    capture the anisotropic characteristics of such joints. Two models were tested:
    a single-beam model for stiffness periodicity every 90°, and a three-beam model
    for stiffness periodicity every 120°. Force responses, stress distribution, and
    sheet bending behaviors were analyzed, confirming that discrete beam elements
    can accurately represent direction-dependent stiffness. These results establish
    a foundation for developing advanced joint modeling strategies in complex mechanical
    systems.</jats:p>'
author:
- first_name: Deekshith Reddy
  full_name: Devulapally, Deekshith Reddy
  id: '76837'
  last_name: Devulapally
- first_name: Thomas
  full_name: Tröster, Thomas
  id: '553'
  last_name: Tröster
citation:
  ama: 'Devulapally DR, Tröster T. Modelling strategies for non-rotationally symmetric
    joints. In: <i>Materials Research Proceedings</i>. Vol 52. Materials Research
    Forum LLC; 2025. doi:<a href="https://doi.org/10.21741/9781644903551-21">10.21741/9781644903551-21</a>'
  apa: Devulapally, D. R., &#38; Tröster, T. (2025). Modelling strategies for non-rotationally
    symmetric joints. <i>Materials Research Proceedings</i>, <i>52</i>. <a href="https://doi.org/10.21741/9781644903551-21">https://doi.org/10.21741/9781644903551-21</a>
  bibtex: '@inproceedings{Devulapally_Tröster_2025, title={Modelling strategies for
    non-rotationally symmetric joints}, volume={52}, DOI={<a href="https://doi.org/10.21741/9781644903551-21">10.21741/9781644903551-21</a>},
    booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
    LLC}, author={Devulapally, Deekshith Reddy and Tröster, Thomas}, year={2025} }'
  chicago: Devulapally, Deekshith Reddy, and Thomas Tröster. “Modelling Strategies
    for Non-Rotationally Symmetric Joints.” In <i>Materials Research Proceedings</i>,
    Vol. 52. Materials Research Forum LLC, 2025. <a href="https://doi.org/10.21741/9781644903551-21">https://doi.org/10.21741/9781644903551-21</a>.
  ieee: 'D. R. Devulapally and T. Tröster, “Modelling strategies for non-rotationally
    symmetric joints,” in <i>Materials Research Proceedings</i>, Paderborn, 2025,
    vol. 52, doi: <a href="https://doi.org/10.21741/9781644903551-21">10.21741/9781644903551-21</a>.'
  mla: Devulapally, Deekshith Reddy, and Thomas Tröster. “Modelling Strategies for
    Non-Rotationally Symmetric Joints.” <i>Materials Research Proceedings</i>, vol.
    52, Materials Research Forum LLC, 2025, doi:<a href="https://doi.org/10.21741/9781644903551-21">10.21741/9781644903551-21</a>.
  short: 'D.R. Devulapally, T. Tröster, in: Materials Research Proceedings, Materials
    Research Forum LLC, 2025.'
conference:
  end_date: 2025-04-03
  location: Paderborn
  name: '21st International conference on sheet metal '
  start_date: 2025-04-01
date_created: 2025-04-08T14:57:51Z
date_updated: 2026-02-27T10:50:10Z
department:
- _id: '149'
- _id: '9'
- _id: '321'
doi: 10.21741/9781644903551-21
intvolume: '        52'
language:
- iso: eng
project:
- _id: '140'
  name: 'TRR 285 – B01: TRR 285 - Subproject B01'
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '130'
  name: 'TRR 285:  Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
    Prozessketten'
publication: Materials Research Proceedings
publication_identifier:
  issn:
  - 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
status: public
title: Modelling strategies for non-rotationally symmetric joints
type: conference
user_id: '76837'
volume: 52
year: '2025'
...
---
_id: '62041'
author:
- first_name: Eileen
  full_name: Reckmann, Eileen
  id: '101166'
  last_name: Reckmann
- first_name: Katrin
  full_name: Temmen, Katrin
  id: '30086'
  last_name: Temmen
citation:
  ama: 'Reckmann E, Temmen K. Intrinsic Motivation in Stem Outreach: An Analysis of
    External Factors in Voluntary and School-Based Lab Settings. In: Gómez Chova L,
    González Martínez C, Lees J, eds. <i>EDULEARN Proceedings</i>. Vol 1. IATED; 2025.
    doi:<a href="https://doi.org/10.21125/edulearn.2025.2462">10.21125/edulearn.2025.2462</a>'
  apa: 'Reckmann, E., &#38; Temmen, K. (2025). Intrinsic Motivation in Stem Outreach:
    An Analysis of External Factors in Voluntary and School-Based Lab Settings. In
    L. Gómez Chova, C. González Martínez, &#38; J. Lees (Eds.), <i>EDULEARN Proceedings</i>
    (Vol. 1). IATED. <a href="https://doi.org/10.21125/edulearn.2025.2462">https://doi.org/10.21125/edulearn.2025.2462</a>'
  bibtex: '@inproceedings{Reckmann_Temmen_2025, title={Intrinsic Motivation in Stem
    Outreach: An Analysis of External Factors in Voluntary and School-Based Lab Settings},
    volume={1}, DOI={<a href="https://doi.org/10.21125/edulearn.2025.2462">10.21125/edulearn.2025.2462</a>},
    booktitle={EDULEARN Proceedings}, publisher={IATED}, author={Reckmann, Eileen
    and Temmen, Katrin}, editor={Gómez Chova, Luis  and González Martínez, Chelo and
    Lees, Joanna}, year={2025} }'
  chicago: 'Reckmann, Eileen, and Katrin Temmen. “Intrinsic Motivation in Stem Outreach:
    An Analysis of External Factors in Voluntary and School-Based Lab Settings.” In
    <i>EDULEARN Proceedings</i>, edited by Luis  Gómez Chova, Chelo González Martínez,
    and Joanna Lees, Vol. 1. IATED, 2025. <a href="https://doi.org/10.21125/edulearn.2025.2462">https://doi.org/10.21125/edulearn.2025.2462</a>.'
  ieee: 'E. Reckmann and K. Temmen, “Intrinsic Motivation in Stem Outreach: An Analysis
    of External Factors in Voluntary and School-Based Lab Settings,” in <i>EDULEARN
    Proceedings</i>, 2025, vol. 1, doi: <a href="https://doi.org/10.21125/edulearn.2025.2462">10.21125/edulearn.2025.2462</a>.'
  mla: 'Reckmann, Eileen, and Katrin Temmen. “Intrinsic Motivation in Stem Outreach:
    An Analysis of External Factors in Voluntary and School-Based Lab Settings.” <i>EDULEARN
    Proceedings</i>, edited by Luis  Gómez Chova et al., vol. 1, IATED, 2025, doi:<a
    href="https://doi.org/10.21125/edulearn.2025.2462">10.21125/edulearn.2025.2462</a>.'
  short: 'E. Reckmann, K. Temmen, in: L. Gómez Chova, C. González Martínez, J. Lees
    (Eds.), EDULEARN Proceedings, IATED, 2025.'
date_created: 2025-11-03T09:25:42Z
date_updated: 2026-02-27T11:17:10Z
department:
- _id: '300'
doi: 10.21125/edulearn.2025.2462
editor:
- first_name: 'Luis '
  full_name: 'Gómez Chova, Luis '
  last_name: Gómez Chova
- first_name: Chelo
  full_name: González Martínez, Chelo
  last_name: González Martínez
- first_name: Joanna
  full_name: Lees, Joanna
  last_name: Lees
intvolume: '         1'
language:
- iso: eng
publication: EDULEARN Proceedings
publication_identifier:
  issn:
  - 2340-1117
publication_status: published
publisher: IATED
status: public
title: 'Intrinsic Motivation in Stem Outreach: An Analysis of External Factors in
  Voluntary and School-Based Lab Settings'
type: conference
user_id: '101166'
volume: 1
year: '2025'
...
---
_id: '64786'
author:
- first_name: Laura
  full_name: Müller, Laura
  id: '44605'
  last_name: Müller
- first_name: Niclas
  full_name: Meihöfener, Niclas
  id: '38611'
  last_name: Meihöfener
- first_name: Johannes Gabriel
  full_name: Siemoneit, Johannes Gabriel
  id: '98462'
  last_name: Siemoneit
  orcid: 0000-0002-2543-2331
- first_name: Iryna
  full_name: Mozgova, Iryna
  id: '95903'
  last_name: Mozgova
citation:
  ama: 'Müller L, Meihöfener N, Siemoneit JG, Mozgova I. Introduction of electronic
    lab notebooks in engineering education - opportunities for a cultural change.
    In: <i>Engineering Education for Sustainable Development (EESD2025)</i>. ; 2025.
    doi:<a href="https://doi.org/10.71779/776">https://doi.org/10.71779/776</a>'
  apa: Müller, L., Meihöfener, N., Siemoneit, J. G., &#38; Mozgova, I. (2025). Introduction
    of electronic lab notebooks in engineering education - opportunities for a cultural
    change. <i>Engineering Education for Sustainable Development (EESD2025)</i>. <a
    href="https://doi.org/10.71779/776">https://doi.org/10.71779/776</a>
  bibtex: '@inproceedings{Müller_Meihöfener_Siemoneit_Mozgova_2025, title={Introduction
    of electronic lab notebooks in engineering education - opportunities for a cultural
    change}, DOI={<a href="https://doi.org/10.71779/776">https://doi.org/10.71779/776</a>},
    booktitle={Engineering Education for Sustainable Development (EESD2025)}, author={Müller,
    Laura and Meihöfener, Niclas and Siemoneit, Johannes Gabriel and Mozgova, Iryna},
    year={2025} }'
  chicago: Müller, Laura, Niclas Meihöfener, Johannes Gabriel Siemoneit, and Iryna
    Mozgova. “Introduction of Electronic Lab Notebooks in Engineering Education -
    Opportunities for a Cultural Change.” In <i>Engineering Education for Sustainable
    Development (EESD2025)</i>, 2025. <a href="https://doi.org/10.71779/776">https://doi.org/10.71779/776</a>.
  ieee: 'L. Müller, N. Meihöfener, J. G. Siemoneit, and I. Mozgova, “Introduction
    of electronic lab notebooks in engineering education - opportunities for a cultural
    change,” 2025, doi: <a href="https://doi.org/10.71779/776">https://doi.org/10.71779/776</a>.'
  mla: Müller, Laura, et al. “Introduction of Electronic Lab Notebooks in Engineering
    Education - Opportunities for a Cultural Change.” <i>Engineering Education for
    Sustainable Development (EESD2025)</i>, 2025, doi:<a href="https://doi.org/10.71779/776">https://doi.org/10.71779/776</a>.
  short: 'L. Müller, N. Meihöfener, J.G. Siemoneit, I. Mozgova, in: Engineering Education
    for Sustainable Development (EESD2025), 2025.'
date_created: 2026-02-27T14:24:40Z
date_updated: 2026-02-27T14:27:09Z
department:
- _id: '741'
doi: https://doi.org/10.71779/776
language:
- iso: eng
publication: Engineering Education for Sustainable Development (EESD2025)
quality_controlled: '1'
status: public
title: Introduction of electronic lab notebooks in engineering education - opportunities
  for a cultural change
type: conference
user_id: '44605'
year: '2025'
...
---
_id: '64781'
author:
- first_name: Felix
  full_name: Rossmann, Felix
  id: '98531'
  last_name: Rossmann
- first_name: Jan
  full_name: Greitens, Jan
  last_name: Greitens
- first_name: Lisa
  full_name: Knoll, Lisa
  id: '88789'
  last_name: Knoll
citation:
  ama: 'Rossmann F, Greitens J, Knoll L. <i>SMEs within a Data-Driven Sustainable
    Finance Framework: A European Survey</i>.; 2025. doi:<a href="http://dx.doi.org/10.2139/ssrn.5677922">http://dx.doi.org/10.2139/ssrn.5677922</a>'
  apa: 'Rossmann, F., Greitens, J., &#38; Knoll, L. (2025). <i>SMEs within a Data-Driven
    Sustainable Finance Framework: A European Survey</i>. <a href="http://dx.doi.org/10.2139/ssrn.5677922">http://dx.doi.org/10.2139/ssrn.5677922</a>'
  bibtex: '@book{Rossmann_Greitens_Knoll_2025, series={CFS WP No 735}, title={SMEs
    within a Data-Driven Sustainable Finance Framework: A European Survey}, DOI={<a
    href="http://dx.doi.org/10.2139/ssrn.5677922">http://dx.doi.org/10.2139/ssrn.5677922</a>},
    author={Rossmann, Felix and Greitens, Jan and Knoll, Lisa}, year={2025}, collection={CFS
    WP No 735} }'
  chicago: 'Rossmann, Felix, Jan Greitens, and Lisa Knoll. <i>SMEs within a Data-Driven
    Sustainable Finance Framework: A European Survey</i>. CFS WP No 735, 2025. <a
    href="http://dx.doi.org/10.2139/ssrn.5677922">http://dx.doi.org/10.2139/ssrn.5677922</a>.'
  ieee: 'F. Rossmann, J. Greitens, and L. Knoll, <i>SMEs within a Data-Driven Sustainable
    Finance Framework: A European Survey</i>. 2025.'
  mla: 'Rossmann, Felix, et al. <i>SMEs within a Data-Driven Sustainable Finance Framework:
    A European Survey</i>. 2025, doi:<a href="http://dx.doi.org/10.2139/ssrn.5677922">http://dx.doi.org/10.2139/ssrn.5677922</a>.'
  short: 'F. Rossmann, J. Greitens, L. Knoll, SMEs within a Data-Driven Sustainable
    Finance Framework: A European Survey, 2025.'
date_created: 2026-02-27T11:08:53Z
date_updated: 2026-02-27T11:09:07Z
department:
- _id: '36'
- _id: '121'
doi: http://dx.doi.org/10.2139/ssrn.5677922
language:
- iso: eng
publication_status: published
series_title: CFS WP No 735
status: public
title: 'SMEs within a Data-Driven Sustainable Finance Framework: A European Survey'
type: working_paper
user_id: '88789'
year: '2025'
...
---
_id: '64664'
author:
- first_name: Eileen
  full_name: Reckmann, Eileen
  id: '101166'
  last_name: Reckmann
- first_name: Katrin
  full_name: Temmen, Katrin
  id: '30086'
  last_name: Temmen
citation:
  ama: 'Reckmann E, Temmen K. Technik im Fokus: Eine qualitative Analyse kindlicher
    Themenwünsche in der non-formalen MINT-Bildung . In: ; 2025.'
  apa: 'Reckmann, E., &#38; Temmen, K. (2025). <i>Technik im Fokus: Eine qualitative
    Analyse kindlicher Themenwünsche in der non-formalen MINT-Bildung </i>. 10. Technikdidaktiksymposium,
    Schwäbisch Gmünd.'
  bibtex: '@inproceedings{Reckmann_Temmen_2025, title={Technik im Fokus: Eine qualitative
    Analyse kindlicher Themenwünsche in der non-formalen MINT-Bildung }, author={Reckmann,
    Eileen and Temmen, Katrin}, year={2025} }'
  chicago: 'Reckmann, Eileen, and Katrin Temmen. “Technik Im Fokus: Eine Qualitative
    Analyse Kindlicher Themenwünsche in Der Non-Formalen MINT-Bildung ,” 2025.'
  ieee: 'E. Reckmann and K. Temmen, “Technik im Fokus: Eine qualitative Analyse kindlicher
    Themenwünsche in der non-formalen MINT-Bildung ,” presented at the 10. Technikdidaktiksymposium,
    Schwäbisch Gmünd, 2025.'
  mla: 'Reckmann, Eileen, and Katrin Temmen. <i>Technik Im Fokus: Eine Qualitative
    Analyse Kindlicher Themenwünsche in Der Non-Formalen MINT-Bildung </i>. 2025.'
  short: 'E. Reckmann, K. Temmen, in: 2025.'
conference:
  end_date: 2025-10-10
  location: Schwäbisch Gmünd
  name: 10. Technikdidaktiksymposium
  start_date: 2025-10-09
date_created: 2026-02-26T10:20:38Z
date_updated: 2026-02-27T11:16:54Z
language:
- iso: eng
status: public
title: 'Technik im Fokus: Eine qualitative Analyse kindlicher Themenwünsche in der
  non-formalen MINT-Bildung '
type: conference_abstract
user_id: '101166'
year: '2025'
...
---
_id: '64787'
abstract:
- lang: eng
  text: This study proposes a fault diagnostics methodology that addresses the challenges
    posed by highly imbalanced datasets typical of railway applications, where faulty
    conditions constitute the minority class. Fault diagnostics is performed from
    the component level upward, considering each sensor’s proximity to its respective
    critical component. Advanced signal analysis, feature engineering, and automated
    data-driven model generation techniques were explored to achieve comprehensive
    diagnostics, such that the model development process accounts for variations in
    the operating conditions and differing levels of information availability. The
    proposed methodology is evaluated on datasets from the MONOCAB, for scenarios
    with limited faulty instances and on the Beijing 2024 IEEE PHM Conference data
    challenge, which focused on fault diagnostics of railway systems under various
    fault modes and operating conditions.
article_number: '1'
author:
- first_name: Osarenren Kennedy
  full_name: Aimiyekagbon, Osarenren Kennedy
  id: '9557'
  last_name: Aimiyekagbon
- first_name: Alexander
  full_name: Löwen, Alexander
  id: '47233'
  last_name: Löwen
- first_name: Raphael
  full_name: Hanselle, Raphael
  last_name: Hanselle
- first_name: Thomas
  full_name: Rief, Thomas
  last_name: Rief
- first_name: Maximilian
  full_name: Beck, Maximilian
  last_name: Beck
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Aimiyekagbon OK, Löwen A, Hanselle R, Rief T, Beck M, Sextro W. Multilevel
    fault diagnostics for railway applications using limited historical data. In:
    <i>PHM Society Asia-Pacific Conference</i>. Vol 5. ; 2025. doi:<a href="https://doi.org/10.36001/phmap.2025.v5i1.4449">10.36001/phmap.2025.v5i1.4449</a>'
  apa: Aimiyekagbon, O. K., Löwen, A., Hanselle, R., Rief, T., Beck, M., &#38; Sextro,
    W. (2025). Multilevel fault diagnostics for railway applications using limited
    historical data. <i>PHM Society Asia-Pacific Conference</i>, <i>5</i>, Article
    1. <a href="https://doi.org/10.36001/phmap.2025.v5i1.4449">https://doi.org/10.36001/phmap.2025.v5i1.4449</a>
  bibtex: '@inproceedings{Aimiyekagbon_Löwen_Hanselle_Rief_Beck_Sextro_2025, title={Multilevel
    fault diagnostics for railway applications using limited historical data}, volume={5},
    DOI={<a href="https://doi.org/10.36001/phmap.2025.v5i1.4449">10.36001/phmap.2025.v5i1.4449</a>},
    number={1}, booktitle={PHM Society Asia-Pacific Conference}, author={Aimiyekagbon,
    Osarenren Kennedy and Löwen, Alexander and Hanselle, Raphael and Rief, Thomas
    and Beck, Maximilian and Sextro, Walter}, year={2025} }'
  chicago: Aimiyekagbon, Osarenren Kennedy, Alexander Löwen, Raphael Hanselle, Thomas
    Rief, Maximilian Beck, and Walter Sextro. “Multilevel Fault Diagnostics for Railway
    Applications Using Limited Historical Data.” In <i>PHM Society Asia-Pacific Conference</i>,
    Vol. 5, 2025. <a href="https://doi.org/10.36001/phmap.2025.v5i1.4449">https://doi.org/10.36001/phmap.2025.v5i1.4449</a>.
  ieee: 'O. K. Aimiyekagbon, A. Löwen, R. Hanselle, T. Rief, M. Beck, and W. Sextro,
    “Multilevel fault diagnostics for railway applications using limited historical
    data,” in <i>PHM Society Asia-Pacific Conference</i>, 2025, vol. 5, doi: <a href="https://doi.org/10.36001/phmap.2025.v5i1.4449">10.36001/phmap.2025.v5i1.4449</a>.'
  mla: Aimiyekagbon, Osarenren Kennedy, et al. “Multilevel Fault Diagnostics for Railway
    Applications Using Limited Historical Data.” <i>PHM Society Asia-Pacific Conference</i>,
    vol. 5, 1, 2025, doi:<a href="https://doi.org/10.36001/phmap.2025.v5i1.4449">10.36001/phmap.2025.v5i1.4449</a>.
  short: 'O.K. Aimiyekagbon, A. Löwen, R. Hanselle, T. Rief, M. Beck, W. Sextro, in:
    PHM Society Asia-Pacific Conference, 2025.'
date_created: 2026-02-27T20:41:54Z
date_updated: 2026-02-27T20:46:44Z
department:
- _id: '151'
doi: 10.36001/phmap.2025.v5i1.4449
intvolume: '         5'
keyword:
- MONOCAB
- Beijing Data Challenge
- Diagnostics of railway systems
language:
- iso: eng
project:
- _id: '1355'
  name: enableATO – Automatisierter Bahnverkehr als Backbone für eine nachhaltige,
    vernetzte Mobilität im ländlichen Raum
publication: PHM Society Asia-Pacific Conference
publication_status: published
quality_controlled: '1'
status: public
title: Multilevel fault diagnostics for railway applications using limited historical
  data
type: conference
user_id: '9557'
volume: 5
year: '2025'
...
---
_id: '64793'
abstract:
- lang: eng
  text: The article explores the role of teachers in self-directed songwriting in
    school music based on the informal learning approach. It investigates a didactic
    design that was implemented in six schools and was empirically researched utilizing
    si-tuational analysis. Based on tensions, that emerge due to conflicting expectations,
    it can be shown, that the teacher's role extends beyond the dichotomy of directive
    instruction versus open facilitation. Instead, it encompasses an interplay of
    six divergent roles which are discussed in their positions in relation to each
    other. These considerations enrich the understanding of teaching practices in
    popular music education, emphasizing the redefinition of teacher-student relationships
    for song-writing in school music.
author:
- first_name: Marc
  full_name: Godau, Marc
  id: '98877'
  last_name: Godau
- first_name: Julia
  full_name: Barreiro, Julia
  last_name: Barreiro
- first_name: Katharina
  full_name: Hermann, Katharina
  last_name: Hermann
- first_name: Timo
  full_name: Neuhausen, Timo
  id: '99991'
  last_name: Neuhausen
  orcid: 0000-0002-8262-767X
- first_name: Dominik
  full_name: Maxelon, Dominik
  last_name: Maxelon
- first_name: Verena
  full_name: Weidner, Verena
  last_name: Weidner
citation:
  ama: 'Godau M, Barreiro J, Hermann K, Neuhausen T, Maxelon D, Weidner V. “Wofür
    bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur
    Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht. In: Frey-Konrad
    U, Hofbauer VC, Blanchard O, Bugiel L, eds. <i>46. Jahresband des Arbeitskreises
    Musikpädagogische Forschung/46th Yearbook of the German Association for Research
    in Music Education</i>. Waxmann; 2025. doi:<a href="https://doi.org/10.31244/9783818850715.13">10.31244/9783818850715.13</a>'
  apa: Godau, M., Barreiro, J., Hermann, K., Neuhausen, T., Maxelon, D., &#38; Weidner,
    V. (2025). “Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch
    helfen kann?” Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht.
    In U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, &#38; L. Bugiel (Eds.), <i>46.
    Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the
    German Association for Research in Music Education</i>. Waxmann. <a href="https://doi.org/10.31244/9783818850715.13">https://doi.org/10.31244/9783818850715.13</a>
  bibtex: '@inbook{Godau_Barreiro_Hermann_Neuhausen_Maxelon_Weidner_2025, title={“Wofür
    bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?” Zur
    Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht}, DOI={<a href="https://doi.org/10.31244/9783818850715.13">10.31244/9783818850715.13</a>},
    booktitle={46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
    Yearbook of the German Association for Research in Music Education}, publisher={Waxmann},
    author={Godau, Marc and Barreiro, Julia and Hermann, Katharina and Neuhausen,
    Timo and Maxelon, Dominik and Weidner, Verena}, editor={Frey-Konrad, Ute and Hofbauer,
    Viola Cäcilia and Blanchard, Olivier and Bugiel, Lukas}, year={2025} }'
  chicago: Godau, Marc, Julia Barreiro, Katharina Hermann, Timo Neuhausen, Dominik
    Maxelon, and Verena Weidner. “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner
    Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting
    im Unterricht.” In <i>46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
    Yearbook of the German Association for Research in Music Education</i>, edited
    by Ute Frey-Konrad, Viola Cäcilia Hofbauer, Olivier Blanchard, and Lukas Bugiel.
    Waxmann, 2025. <a href="https://doi.org/10.31244/9783818850715.13">https://doi.org/10.31244/9783818850715.13</a>.
  ieee: M. Godau, J. Barreiro, K. Hermann, T. Neuhausen, D. Maxelon, and V. Weidner,
    “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen kann?’
    Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht,” in <i>46.
    Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the
    German Association for Research in Music Education</i>, U. Frey-Konrad, V. C.
    Hofbauer, O. Blanchard, and L. Bugiel, Eds. Waxmann, 2025.
  mla: Godau, Marc, et al. “‘Wofür bin ich denn hier, wenn ich nicht in irgendeiner
    Weise auch helfen kann?’ Zur Rolle der Lehrkraft beim selbstständigen Songwriting
    im Unterricht.” <i>46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
    Yearbook of the German Association for Research in Music Education</i>, edited
    by Ute Frey-Konrad et al., Waxmann, 2025, doi:<a href="https://doi.org/10.31244/9783818850715.13">10.31244/9783818850715.13</a>.
  short: 'M. Godau, J. Barreiro, K. Hermann, T. Neuhausen, D. Maxelon, V. Weidner,
    in: U. Frey-Konrad, V.C. Hofbauer, O. Blanchard, L. Bugiel (Eds.), 46. Jahresband
    des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association
    for Research in Music Education, Waxmann, 2025.'
date_created: 2026-02-28T09:50:45Z
date_updated: 2026-02-28T15:29:25Z
department:
- _id: '131'
- _id: '36'
- _id: '129'
- _id: '540'
doi: 10.31244/9783818850715.13
editor:
- first_name: Ute
  full_name: Frey-Konrad, Ute
  last_name: Frey-Konrad
- first_name: Viola Cäcilia
  full_name: Hofbauer, Viola Cäcilia
  last_name: Hofbauer
- first_name: Olivier
  full_name: Blanchard, Olivier
  last_name: Blanchard
- first_name: Lukas
  full_name: Bugiel, Lukas
  last_name: Bugiel
language:
- iso: ger
main_file_link:
- open_access: '1'
oa: '1'
publication: 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
  of the German Association for Research in Music Education
publication_identifier:
  isbn:
  - '9783818800710'
publication_status: published
publisher: Waxmann
quality_controlled: '1'
status: public
title: '"Wofür bin ich denn hier, wenn ich nicht in irgendeiner Weise auch helfen
  kann?" Zur Rolle der Lehrkraft beim selbstständigen Songwriting im Unterricht'
type: book_chapter
user_id: '99991'
year: '2025'
...
---
_id: '64792'
abstract:
- lang: eng
  text: The role of institutionalized standards for the hybridization of musical practices.
    On the socio-materiality of songwriting-producing in the bedroom studio This study
    examines the socio-materiality of hybrid music practices in bedroom studios, focusing
    on the interplay between traditional music education institutions and YouTube
    education. A single case situational analysis reveals how standardized instrumental
    and music production practices are combined to form a hybrid practice. It shows
    that traditional music education institutions, such as music schools and conservatories,
    specialize in the selection of chord tones, while You-Tube videos focus on sound
    design. Using an actor-network theory approach, the study demonstrates the permeability
    of informal and institutional learning spaces. The findings suggest that songwriting-producing
    is not simply a sum of different practices, but rather a process of negotiation
    and compromise between different standards and goals, as well as the distribution
    of practice between humans and technology.
author:
- first_name: Timo
  full_name: Neuhausen, Timo
  id: '99991'
  last_name: Neuhausen
  orcid: 0000-0002-8262-767X
citation:
  ama: 'Neuhausen T. Die Rolle institutionalisierter Standards für die Hybridisierung
    musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio.
    In: Frey-Konrad U, Hofbauer VC, Blanchard O, Bugiel L, eds. <i>46. Jahresband
    Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the German Association
    for Research in Music Education</i>. Waxmann; 2025. doi:<a href="https://doi.org/10.31244/9783818850715.19">10.31244/9783818850715.19</a>'
  apa: Neuhausen, T. (2025). Die Rolle institutionalisierter Standards für die Hybridisierung
    musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio.
    In U. Frey-Konrad, V. C. Hofbauer, O. Blanchard, &#38; L. Bugiel (Eds.), <i>46.
    Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook of the
    German Association for Research in Music Education</i>. Waxmann. <a href="https://doi.org/10.31244/9783818850715.19">https://doi.org/10.31244/9783818850715.19</a>
  bibtex: '@inbook{Neuhausen_2025, title={Die Rolle institutionalisierter Standards
    für die Hybridisierung musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing
    im Bedroom-Studio}, DOI={<a href="https://doi.org/10.31244/9783818850715.19">10.31244/9783818850715.19</a>},
    booktitle={46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th
    Yearbook of the German Association for Research in Music Education}, publisher={Waxmann},
    author={Neuhausen, Timo}, editor={Frey-Konrad, Ute and Hofbauer, Viola Cäcilia
    and Blanchard, Olivier and Bugiel, Lukas}, year={2025} }'
  chicago: Neuhausen, Timo. “Die Rolle Institutionalisierter Standards Für Die Hybridisierung
    Musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing Im Bedroom-Studio.”
    In <i>46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
    of the German Association for Research in Music Education</i>, edited by Ute Frey-Konrad,
    Viola Cäcilia Hofbauer, Olivier Blanchard, and Lukas Bugiel. Waxmann, 2025. <a
    href="https://doi.org/10.31244/9783818850715.19">https://doi.org/10.31244/9783818850715.19</a>.
  ieee: T. Neuhausen, “Die Rolle institutionalisierter Standards für die Hybridisierung
    musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio,”
    in <i>46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
    of the German Association for Research in Music Education</i>, U. Frey-Konrad,
    V. C. Hofbauer, O. Blanchard, and L. Bugiel, Eds. Waxmann, 2025.
  mla: Neuhausen, Timo. “Die Rolle Institutionalisierter Standards Für Die Hybridisierung
    Musikalischer Praxen. Zur Soziomaterialität von Songwriting-Producing Im Bedroom-Studio.”
    <i>46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
    of the German Association for Research in Music Education</i>, edited by Ute Frey-Konrad
    et al., Waxmann, 2025, doi:<a href="https://doi.org/10.31244/9783818850715.19">10.31244/9783818850715.19</a>.
  short: 'T. Neuhausen, in: U. Frey-Konrad, V.C. Hofbauer, O. Blanchard, L. Bugiel
    (Eds.), 46. Jahresband Des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
    of the German Association for Research in Music Education, Waxmann, 2025.'
date_created: 2026-02-28T09:47:25Z
date_updated: 2026-02-28T15:28:48Z
department:
- _id: '131'
- _id: '36'
- _id: '129'
- _id: '540'
doi: 10.31244/9783818850715.19
editor:
- first_name: Ute
  full_name: Frey-Konrad, Ute
  last_name: Frey-Konrad
- first_name: Viola Cäcilia
  full_name: Hofbauer, Viola Cäcilia
  last_name: Hofbauer
- first_name: Olivier
  full_name: Blanchard, Olivier
  last_name: Blanchard
- first_name: Lukas
  full_name: Bugiel, Lukas
  last_name: Bugiel
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication: 46. Jahresband des Arbeitskreises Musikpädagogische Forschung/46th Yearbook
  of the German Association for Research in Music Education
publication_identifier:
  isbn:
  - '9783818800710'
publication_status: published
publisher: Waxmann
quality_controlled: '1'
status: public
title: Die Rolle institutionalisierter Standards für die Hybridisierung musikalischer
  Praxen. Zur Soziomaterialität von Songwriting-Producing im Bedroom-Studio
type: book_chapter
user_id: '99991'
year: '2025'
...
---
_id: '64795'
author:
- first_name: Marc
  full_name: Ebert, Marc
  id: '91897'
  last_name: Ebert
- first_name: Katrin
  full_name: Temmen, Katrin
  id: '30086'
  last_name: Temmen
citation:
  ama: 'Ebert M, Temmen K. Über Rätsel zur Quantenphysik – Eine spielerische Heranführung
    an ein abstraktes Thema. In: ; 2025.'
  apa: Ebert, M., &#38; Temmen, K. (2025). <i>Über Rätsel zur Quantenphysik – Eine
    spielerische Heranführung an ein abstraktes Thema</i>. 20. LeLa-Jahrestagung,
    Oldenburg.
  bibtex: '@inproceedings{Ebert_Temmen_2025, title={Über Rätsel zur Quantenphysik
    – Eine spielerische Heranführung an ein abstraktes Thema}, author={Ebert, Marc
    and Temmen, Katrin}, year={2025} }'
  chicago: Ebert, Marc, and Katrin Temmen. “Über Rätsel zur Quantenphysik – Eine spielerische
    Heranführung an ein abstraktes Thema,” 2025.
  ieee: M. Ebert and K. Temmen, “Über Rätsel zur Quantenphysik – Eine spielerische
    Heranführung an ein abstraktes Thema,” presented at the 20. LeLa-Jahrestagung,
    Oldenburg, 2025.
  mla: Ebert, Marc, and Katrin Temmen. <i>Über Rätsel zur Quantenphysik – Eine spielerische
    Heranführung an ein abstraktes Thema</i>. 2025.
  short: 'M. Ebert, K. Temmen, in: 2025.'
conference:
  end_date: 2025-03-11
  location: Oldenburg
  name: 20. LeLa-Jahrestagung
  start_date: 2025-03-09
date_created: 2026-02-28T12:35:03Z
date_updated: 2026-02-28T12:55:30Z
department:
- _id: '300'
language:
- iso: ger
project:
- _id: '1393'
  name: Heranführung der Generation Z an die Denkweise in der Quantenphysik (HedwiQ)
status: public
title: Über Rätsel zur Quantenphysik – Eine spielerische Heranführung an ein abstraktes
  Thema
type: conference_abstract
user_id: '91897'
year: '2025'
...
---
_id: '64798'
abstract:
- lang: eng
  text: "Lead-containing piezoelectric ceramics are still the base for today’s ultrasonic
    transducers used in broad applications. This is partly due to missing powerful
    lead-free piezoelectric ceramic parts in the commercial market. There has been
    much research on lead-free materials but developing them into marketable parts
    seems to be an ongoing process. The actual exemption of ROHS has expired, but
    as the new exemption has already been requested, ceramic suppliers keep on selling
    lead containing products. Nevertheless, these should be replaced by lead-free
    alternatives for environmental and health issues. \r\nThis contribution focuses
    on exploring the technological readiness level of lead-free hard piezoceramics
    for prestressed ultrasonic transducers. A small series of bolted Langevin transducers
    was set up with standard PZT material and three commercial lead-free variants.
    Results of the building process from individual ring ceramic characteristics to
    transducer load tests are presented. The main finding of this study is that the
    lead-free materials technically can compete with the standard PZT for medium-power
    applications. Some adaptations in the ultrasonic system must be done: the geometry
    must be altered to fit resonance frequency, and higher voltages or thinner ceramics
    are needed to achieve the same vibration level at low load. For reaching same
    power, the volume of lead-free ceramics must be 1.5 to 3 times larger. As already
    promoted in literature, mechanical losses at high vibration levels are smaller
    for the lead-free materials. This might help to argument lead-free piezoelectric
    materials in some applications.\r\n\r\nReferences\r\n1.\tDirective 2011/65/EU
    of the European Parliament and of the Council of 8 June 2011 on the Restriction
    of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment.
    EUR-Lex Document 02011L0065-20240801. Available online: http://data.europa.eu/eli/dir/2011/65/2024-08-01
    (accessed on 24 January 2025).\r\n2.\tLangevin, P. (1918) Method and Apparatus
    for Transmitting and Receiving Submarine Elastic Waves Using the Piezoelectric
    Properties of Quartz. French Patent Office; Patent No. FR505703.\r\n3.\tHemsel,
    T.; Twiefel, J. (2023) Piezoelectric Ultrasonic Power Transducers. In Encyclopedia
    of Materials: Electronics; Academic Press: Oxford, UK; pp. 276–285. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.\r\n4.\tATHENA
    Technologie Beratung GmbH (2025) Description of Ultrasound Generator. Available
    online: http://shop.myathena.de/epages/12074748.sf/de_DE/?ObjectPath=/Shops/12074748/Products/AM200
    (accessed on 13 January 2025).\r\n5.\tLittmann, W.; Hemsel, T.; Kauczor, C.; Wallaschek,
    J.; Sinha, W. (2003) Load-adaptive phase-controller for resonant driven piezoelectric
    devices. Proc. World Congr. Ultrason. 2003, 48, 547–550.\r\n6.\tScheidemann, C.,
    Bornmann, P., Littmann, W., & Hemsel, T. (2025). Lead-Free Ceramics in Prestressed
    Ultrasonic Transducers. Actuators, 14(2), 55. https://doi.org/10.3390/act14020055\r\n"
author:
- first_name: Claus
  full_name: Scheidemann, Claus
  id: '38259'
  last_name: Scheidemann
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Walter
  full_name: Littmann, Walter
  last_name: Littmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
citation:
  ama: 'Scheidemann C, Bornmann P, Littmann W, Hemsel T. Bolted Langevin transducers
    with leadfree piezoelectric ceramics. In: ; 2025.'
  apa: Scheidemann, C., Bornmann, P., Littmann, W., &#38; Hemsel, T. (2025). <i>Bolted
    Langevin transducers with leadfree piezoelectric ceramics</i>. International Workshop
    on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania.
  bibtex: '@inproceedings{Scheidemann_Bornmann_Littmann_Hemsel_2025, title={Bolted
    Langevin transducers with leadfree piezoelectric ceramics}, author={Scheidemann,
    Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}, year={2025}
    }'
  chicago: Scheidemann, Claus, Peter Bornmann, Walter Littmann, and Tobias Hemsel.
    “Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics,” 2025.
  ieee: C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Bolted Langevin
    transducers with leadfree piezoelectric ceramics,” presented at the International
    Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius,
    Lithuania, 2025.
  mla: Scheidemann, Claus, et al. <i>Bolted Langevin Transducers with Leadfree Piezoelectric
    Ceramics</i>. 2025.
  short: 'C. Scheidemann, P. Bornmann, W. Littmann, T. Hemsel, in: 2025.'
conference:
  end_date: 2025-07-03
  location: Vilnius, Lithuania
  name: International Workshop on Piezoelectric Materials and Applications in Actuators
    (IWPMA)
  start_date: 2025-07-01
date_created: 2026-03-02T10:39:40Z
date_updated: 2026-03-02T11:04:56Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hemsel
  date_created: 2026-03-02T10:37:46Z
  date_updated: 2026-03-02T11:00:37Z
  file_id: '64799'
  file_name: IWPMA_2025_Hemsel.pdf
  file_size: 1812289
  relation: main_file
file_date_updated: 2026-03-02T11:00:37Z
has_accepted_license: '1'
keyword:
- lead free piezoelectric ceramics
- bolted Langevin transducer
- medium power ultrasound.
language:
- iso: eng
oa: '1'
status: public
title: Bolted Langevin transducers with leadfree piezoelectric ceramics
type: conference
user_id: '210'
year: '2025'
...
---
_id: '64800'
abstract:
- lang: eng
  text: "Intensive ultrasonic cleaning of surfaces by means of a lead-free ultrasonic
    transducer with focusing sonotrode\r\nUltrasonic cleaning baths are probably a
    coincidental development: After underwater sonars had already been successfully
    used to detect submarines before 1920, it was probably observed in this environment
    that the ultrasonic oscillators not only showed a self-cleaning effect but also
    cavitation damage. At the beginning of the 1950s, the first ultrasonic cleaning
    devices finally came onto the market. Today, the range of applications ranges
    from household appliances for jewellery and eyewear cleaning to classic cleaning
    baths for metal parts and systems for cleaning highly sensitive electronic components.
    There is a certain gap in handheld, mobile cleaning equipment. Although devices
    for spot cleaning of textiles are known, the cleaning effect is usually low. \r\nDue
    to the directive 2011/65/EU on the restriction of the use of hazardous substances
    in electrical and electronic equipment (RoHS) [1] lead should no longer be used
    in technical devices. As today’s standard ceramics for medium and high-power ultrasonic
    transducers typically contain lead, there is a need to explore the use of lead-free
    ceramics in this field. Honda [2] already offers a cleaning transducer based on
    lead-free piezoelectric ceramics, but it is designed to be used in cleaning baths.\r\nThis
    article presents the model-based development of a highly innovative ultrasonic
    cleaner. On the one hand, lead-free piezoelectric ceramics are used, and on the
    other hand, a special sonotrode has been developed that concentrates the sound
    in such a way that a strong cavitation and thus cleaning effect is achieved with
    comparatively low power in a short time. Coupled field finite element method was
    used to find an appropriate geometry for the focussing sonotrode. The comparison
    of simulation and measurement results shows that the lead-free piezoceramics used
    do their job well and can keep up with standard ceramics, but more ceramic volume
    is needed to achieve same power. An advanced control concept was elaborated to
    ensure continuous hard cavitation at varying distances between the sonotrode and
    the part to be cleaned. Cleaning results for different surfaces and contaminations
    are presented. The concept of the focusing sonotrode shows that a convincing cleaning
    result can be achieved even with low power and in short time, provided that the
    oscillation system and control electronics are suitably coordinated.\r\n\r\nReferences\r\n[1]
    http://data.europa.eu/eli/dir/2011/65/2024-08-01 \r\n[2] https://en.honda-el.co.jp/product/ceramics/lineup/lead_off/lead-off
    \r\n"
author:
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Claus
  full_name: Scheidemann, Claus
  id: '38259'
  last_name: Scheidemann
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Walter
  full_name: Littmann, Walter
  last_name: Littmann
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Hemsel T, Scheidemann C, Bornmann P, Littmann W, Sextro W. Intensive ultrasonic
    cleaning of surfaces by means of lead-free ultrasonic transducer with focussing
    sonotrode. In: ; 2025.'
  apa: Hemsel, T., Scheidemann, C., Bornmann, P., Littmann, W., &#38; Sextro, W. (2025).
    <i>Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic
    transducer with focussing sonotrode</i>. International Congress on Ultrasonics
    (ICU), Paderborn, Germany.
  bibtex: '@inproceedings{Hemsel_Scheidemann_Bornmann_Littmann_Sextro_2025, title={Intensive
    ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with
    focussing sonotrode}, author={Hemsel, Tobias and Scheidemann, Claus and Bornmann,
    Peter and Littmann, Walter and Sextro, Walter}, year={2025} }'
  chicago: Hemsel, Tobias, Claus Scheidemann, Peter Bornmann, Walter Littmann, and
    Walter Sextro. “Intensive Ultrasonic Cleaning of Surfaces by Means of Lead-Free
    Ultrasonic Transducer with Focussing Sonotrode,” 2025.
  ieee: T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, and W. Sextro, “Intensive
    ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with
    focussing sonotrode,” presented at the International Congress on Ultrasonics (ICU),
    Paderborn, Germany, 2025.
  mla: Hemsel, Tobias, et al. <i>Intensive Ultrasonic Cleaning of Surfaces by Means
    of Lead-Free Ultrasonic Transducer with Focussing Sonotrode</i>. 2025.
  short: 'T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, W. Sextro, in: 2025.'
conference:
  end_date: 2025-09-25
  location: Paderborn, Germany
  name: International Congress on Ultrasonics (ICU)
  start_date: 2025-09-21
date_created: 2026-03-02T10:47:48Z
date_updated: 2026-03-02T10:58:37Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hemsel
  date_created: 2026-03-02T10:46:43Z
  date_updated: 2026-03-02T10:58:37Z
  file_id: '64801'
  file_name: ICU_2025_Hemsel.pdf
  file_size: 1946202
  relation: main_file
file_date_updated: 2026-03-02T10:58:37Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
status: public
title: Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic
  transducer with focussing sonotrode
type: conference
user_id: '210'
year: '2025'
...
---
_id: '61755'
author:
- first_name: Claus
  full_name: Scheidemann, Claus
  id: '38259'
  last_name: Scheidemann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Scheidemann C, Hemsel T, Sextro W. Time dependent material characteristics
    of prestressed piezoelectric ceramics in langevin transducers. In: ; 2025.'
  apa: Scheidemann, C., Hemsel, T., &#38; Sextro, W. (2025). <i>Time dependent material
    characteristics of prestressed piezoelectric ceramics in langevin transducers</i>.
    22nd International Workshop on Piezoelectric Materials and Applications in Actuators
    (IWPMA), Vilnius, Lithuania.
  bibtex: '@inproceedings{Scheidemann_Hemsel_Sextro_2025, title={Time dependent material
    characteristics of prestressed piezoelectric ceramics in langevin transducers},
    author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}, year={2025}
    }'
  chicago: Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. “Time Dependent Material
    Characteristics of Prestressed Piezoelectric Ceramics in Langevin Transducers,”
    2025.
  ieee: C. Scheidemann, T. Hemsel, and W. Sextro, “Time dependent material characteristics
    of prestressed piezoelectric ceramics in langevin transducers,” presented at the
    22nd International Workshop on Piezoelectric Materials and Applications in Actuators
    (IWPMA), Vilnius, Lithuania, 2025.
  mla: Scheidemann, Claus, et al. <i>Time Dependent Material Characteristics of Prestressed
    Piezoelectric Ceramics in Langevin Transducers</i>. 2025.
  short: 'C. Scheidemann, T. Hemsel, W. Sextro, in: 2025.'
conference:
  end_date: 2025-07-3
  location: Vilnius, Lithuania
  name: 22nd International Workshop on Piezoelectric Materials and Applications in
    Actuators (IWPMA)
  start_date: 2025-07-1
date_created: 2025-10-08T14:22:32Z
date_updated: 2026-03-02T10:59:53Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hemsel
  date_created: 2026-01-30T11:07:48Z
  date_updated: 2026-03-02T10:59:53Z
  file_id: '63817'
  file_name: SHS25_IWPMA_2025.pdf
  file_size: 644147
  relation: main_file
file_date_updated: 2026-03-02T10:59:53Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
  name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
    für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Time dependent material characteristics of prestressed piezoelectric ceramics
  in langevin transducers
type: conference
user_id: '210'
year: '2025'
...
---
_id: '61757'
author:
- first_name: Claus
  full_name: Scheidemann, Claus
  id: '38259'
  last_name: Scheidemann
- first_name: Julius
  full_name: Porzenheim, Julius
  last_name: Porzenheim
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Scheidemann C, Porzenheim J, Hemsel T, Sextro W. Investigation of the Setting
    Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers. In: ; 2025.'
  apa: Scheidemann, C., Porzenheim, J., Hemsel, T., &#38; Sextro, W. (2025). <i>Investigation
    of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers</i>.
    2025 International Congress on Ultrasonics (ICU), Paderborn, Germany.
  bibtex: '@inproceedings{Scheidemann_Porzenheim_Hemsel_Sextro_2025, title={Investigation
    of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers},
    author={Scheidemann, Claus and Porzenheim, Julius and Hemsel, Tobias and Sextro,
    Walter}, year={2025} }'
  chicago: Scheidemann, Claus, Julius Porzenheim, Tobias Hemsel, and Walter Sextro.
    “Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic
    Transducers,” 2025.
  ieee: C. Scheidemann, J. Porzenheim, T. Hemsel, and W. Sextro, “Investigation of
    the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers,”
    presented at the 2025 International Congress on Ultrasonics (ICU), Paderborn,
    Germany, 2025.
  mla: Scheidemann, Claus, et al. <i>Investigation of the Setting Behaviour of Mechanically
    Biased Piezoelectric Ultrasonic Transducers</i>. 2025.
  short: 'C. Scheidemann, J. Porzenheim, T. Hemsel, W. Sextro, in: 2025.'
conference:
  end_date: 2025-09-25
  location: Paderborn, Germany
  name: 2025 International Congress on Ultrasonics (ICU)
  start_date: 2025-09-21
date_created: 2025-10-08T14:33:44Z
date_updated: 2026-03-02T10:59:36Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
  content_type: application/pdf
  creator: hemsel
  date_created: 2026-01-30T07:30:44Z
  date_updated: 2026-03-02T10:59:36Z
  file_id: '63816'
  file_name: Sch25_ICU_2025.pdf
  file_size: 783790
  relation: main_file
file_date_updated: 2026-03-02T10:59:36Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
  name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
    für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric
  Ultrasonic Transducers
type: conference
user_id: '210'
year: '2025'
...
---
_id: '57829'
abstract:
- lang: eng
  text: 'Artificial intelligence (AI) is driving transformative changes across numerous
    fields, revolutionizing conventional processes and creating new opportunities
    for innovation. The development of mechatronic systems is undergoing a similar
    transformation. Over the past decade, modeling, simulation, and optimization techniques
    have become integral to the design process, paving the way for the adoption of
    AI-based methods. In this paper, we examine the potential for integrating AI into
    the engineering design process, using the V-model from the VDI guideline 2206,
    considered the state-of-the-art in product design, as a foundation. We identify
    and classify AI methods based on their suitability for specific stages within
    the engineering product design workflow. Furthermore, we present a series of application
    examples where AI-assisted design has been successfully implemented by the authors.
    These examples, drawn from research projects within the DFG Priority Program \emph{SPP~2353:
    Daring More Intelligence - Design Assistants in Mechanics and Dynamics}, showcase
    a diverse range of applications across mechanics and mechatronics, including areas
    such as acoustics and robotics.'
author:
- first_name: Kristin M.
  full_name: de Payrebrune, Kristin M.
  last_name: de Payrebrune
- first_name: Kathrin
  full_name: Flaßkamp, Kathrin
  last_name: Flaßkamp
- first_name: Tom
  full_name: Ströhla, Tom
  last_name: Ströhla
- first_name: Thomas
  full_name: Sattel, Thomas
  last_name: Sattel
- first_name: Dieter
  full_name: Bestle, Dieter
  last_name: Bestle
- first_name: Benedict
  full_name: Röder, Benedict
  last_name: Röder
- first_name: Peter
  full_name: Eberhard, Peter
  last_name: Eberhard
- first_name: Sebastian
  full_name: Peitz, Sebastian
  last_name: Peitz
- first_name: Marcus
  full_name: Stoffel, Marcus
  last_name: Stoffel
- first_name: Gulakala
  full_name: Rutwik, Gulakala
  last_name: Rutwik
- first_name: Borse
  full_name: Aditya, Borse
  last_name: Aditya
- first_name: Meike Claudia
  full_name: Wohlleben, Meike Claudia
  id: '43991'
  last_name: Wohlleben
  orcid: 0009-0009-9767-7168
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Maximilian
  full_name: Raff, Maximilian
  last_name: Raff
- first_name: C. David
  full_name: Remy, C. David
  last_name: Remy
- first_name: Manish
  full_name: Yadav, Manish
  last_name: Yadav
- first_name: Merten
  full_name: Stender, Merten
  last_name: Stender
- first_name: Jan
  full_name: van Delden, Jan
  last_name: van Delden
- first_name: Timo
  full_name: Lüddecke, Timo
  last_name: Lüddecke
- first_name: Sabine C.
  full_name: Langer, Sabine C.
  last_name: Langer
- first_name: Julius
  full_name: Schultz, Julius
  last_name: Schultz
- first_name: Christopher
  full_name: Blech, Christopher
  last_name: Blech
citation:
  ama: de Payrebrune KM, Flaßkamp K, Ströhla T, et al. The impact of AI on engineering
    design procedures for dynamical systems. <i>Technische Mechanik - European Journal
    of Engineering Mechanics</i>. 2025;45(1):1-23. doi:<a href="https://doi.org/10.24352/UB.OVGU-2025-037">10.24352/UB.OVGU-2025-037</a>
  apa: de Payrebrune, K. M., Flaßkamp, K., Ströhla, T., Sattel, T., Bestle, D., Röder,
    B., Eberhard, P., Peitz, S., Stoffel, M., Rutwik, G., Aditya, B., Wohlleben, M.
    C., Sextro, W., Raff, M., Remy, C. D., Yadav, M., Stender, M., van Delden, J.,
    Lüddecke, T., … Blech, C. (2025). The impact of AI on engineering design procedures
    for dynamical systems. <i>Technische Mechanik - European Journal of Engineering
    Mechanics</i>, <i>45</i>(1), 1–23. <a href="https://doi.org/10.24352/UB.OVGU-2025-037">https://doi.org/10.24352/UB.OVGU-2025-037</a>
  bibtex: '@article{de Payrebrune_Flaßkamp_Ströhla_Sattel_Bestle_Röder_Eberhard_Peitz_Stoffel_Rutwik_et
    al._2025, title={The impact of AI on engineering design procedures for dynamical
    systems}, volume={45}, DOI={<a href="https://doi.org/10.24352/UB.OVGU-2025-037">10.24352/UB.OVGU-2025-037</a>},
    number={1}, journal={Technische Mechanik - European Journal of Engineering Mechanics},
    author={de Payrebrune, Kristin M. and Flaßkamp, Kathrin and Ströhla, Tom and Sattel,
    Thomas and Bestle, Dieter and Röder, Benedict and Eberhard, Peter and Peitz, Sebastian
    and Stoffel, Marcus and Rutwik, Gulakala and et al.}, year={2025}, pages={1–23}
    }'
  chicago: 'Payrebrune, Kristin M. de, Kathrin Flaßkamp, Tom Ströhla, Thomas Sattel,
    Dieter Bestle, Benedict Röder, Peter Eberhard, et al. “The Impact of AI on Engineering
    Design Procedures for Dynamical Systems.” <i>Technische Mechanik - European Journal
    of Engineering Mechanics</i> 45, no. 1 (2025): 1–23. <a href="https://doi.org/10.24352/UB.OVGU-2025-037">https://doi.org/10.24352/UB.OVGU-2025-037</a>.'
  ieee: 'K. M. de Payrebrune <i>et al.</i>, “The impact of AI on engineering design
    procedures for dynamical systems,” <i>Technische Mechanik - European Journal of
    Engineering Mechanics</i>, vol. 45, no. 1, pp. 1–23, 2025, doi: <a href="https://doi.org/10.24352/UB.OVGU-2025-037">10.24352/UB.OVGU-2025-037</a>.'
  mla: de Payrebrune, Kristin M., et al. “The Impact of AI on Engineering Design Procedures
    for Dynamical Systems.” <i>Technische Mechanik - European Journal of Engineering
    Mechanics</i>, vol. 45, no. 1, 2025, pp. 1–23, doi:<a href="https://doi.org/10.24352/UB.OVGU-2025-037">10.24352/UB.OVGU-2025-037</a>.
  short: K.M. de Payrebrune, K. Flaßkamp, T. Ströhla, T. Sattel, D. Bestle, B. Röder,
    P. Eberhard, S. Peitz, M. Stoffel, G. Rutwik, B. Aditya, M.C. Wohlleben, W. Sextro,
    M. Raff, C.D. Remy, M. Yadav, M. Stender, J. van Delden, T. Lüddecke, S.C. Langer,
    J. Schultz, C. Blech, Technische Mechanik - European Journal of Engineering Mechanics
    45 (2025) 1–23.
date_created: 2024-12-18T09:07:41Z
date_updated: 2026-03-03T06:31:55Z
doi: 10.24352/UB.OVGU-2025-037
intvolume: '        45'
issue: '1'
language:
- iso: eng
page: 1-23
publication: Technische Mechanik - European Journal of Engineering Mechanics
quality_controlled: '1'
status: public
title: The impact of AI on engineering design procedures for dynamical systems
type: journal_article
user_id: '43991'
volume: 45
year: '2025'
...
