---
_id: '63800'
abstract:
- lang: eng
  text: In this contribution, we address the estimation of the frequency-dependent
    elastic parameters of polymers in the ultrasound range, which is formulated as
    an inverse problem. This inverse problem is implemented as a nonlinear regression-type
    optimization problem, in which the simulation signals are fitted to the measurement
    signals. These signals consist of displacement responses in waveguides, focusing
    on hollow cylindrical geometries to enhance the simulation efficiency. To accelerate
    the optimization and reduce the number of model evaluations and wait times, we
    propose two novel methods. First, we introduce an adaptation of the Levenberg–Marquardt
    method derived from a geometrical interpretation of the least-squares optimization
    problem. Second, we introduce an improved objective function based on the autocorrelated
    envelopes of the measurement and simulation signals. Given that this study primarily
    relies on simulation data to quantify optimization convergence, we aggregate the
    expected ranges of realistic material parameters and derive their distributions
    to ensure the reproducibility of optimizations with proper measurements. We demonstrate
    the effectiveness of our objective function modification and step adaptation for
    various materials with isotropic material symmetry by comparing them with the
    Broyden–Fletcher–Goldfarb–Shanno method. In all cases, our method reduces the
    total number of model evaluations, thereby shortening the time to identify the
    material parameters.
author:
- first_name: Dominik
  full_name: Itner, Dominik
  last_name: Itner
- first_name: Dmitrij
  full_name: Dreiling, Dmitrij
  id: '32616'
  last_name: Dreiling
- first_name: Hauke
  full_name: Gravenkamp, Hauke
  last_name: Gravenkamp
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
- first_name: Carolin
  full_name: Birk, Carolin
  last_name: Birk
citation:
  ama: Itner D, Dreiling D, Gravenkamp H, Henning B, Birk C. A modified Levenberg–Marquardt
    method for estimating the elastic material parameters of polymer waveguides using
    residuals between autocorrelated frequency responses. <i>Mechanical Systems and
    Signal Processing</i>. 2026;247:113904. doi:<a href="https://doi.org/10.1016/j.ymssp.2026.113904">https://doi.org/10.1016/j.ymssp.2026.113904</a>
  apa: Itner, D., Dreiling, D., Gravenkamp, H., Henning, B., &#38; Birk, C. (2026).
    A modified Levenberg–Marquardt method for estimating the elastic material parameters
    of polymer waveguides using residuals between autocorrelated frequency responses.
    <i>Mechanical Systems and Signal Processing</i>, <i>247</i>, 113904. <a href="https://doi.org/10.1016/j.ymssp.2026.113904">https://doi.org/10.1016/j.ymssp.2026.113904</a>
  bibtex: '@article{Itner_Dreiling_Gravenkamp_Henning_Birk_2026, title={A modified
    Levenberg–Marquardt method for estimating the elastic material parameters of polymer
    waveguides using residuals between autocorrelated frequency responses}, volume={247},
    DOI={<a href="https://doi.org/10.1016/j.ymssp.2026.113904">https://doi.org/10.1016/j.ymssp.2026.113904</a>},
    journal={Mechanical Systems and Signal Processing}, author={Itner, Dominik and
    Dreiling, Dmitrij and Gravenkamp, Hauke and Henning, Bernd and Birk, Carolin},
    year={2026}, pages={113904} }'
  chicago: 'Itner, Dominik, Dmitrij Dreiling, Hauke Gravenkamp, Bernd Henning, and
    Carolin Birk. “A Modified Levenberg–Marquardt Method for Estimating the Elastic
    Material Parameters of Polymer Waveguides Using Residuals between Autocorrelated
    Frequency Responses.” <i>Mechanical Systems and Signal Processing</i> 247 (2026):
    113904. <a href="https://doi.org/10.1016/j.ymssp.2026.113904">https://doi.org/10.1016/j.ymssp.2026.113904</a>.'
  ieee: 'D. Itner, D. Dreiling, H. Gravenkamp, B. Henning, and C. Birk, “A modified
    Levenberg–Marquardt method for estimating the elastic material parameters of polymer
    waveguides using residuals between autocorrelated frequency responses,” <i>Mechanical
    Systems and Signal Processing</i>, vol. 247, p. 113904, 2026, doi: <a href="https://doi.org/10.1016/j.ymssp.2026.113904">https://doi.org/10.1016/j.ymssp.2026.113904</a>.'
  mla: Itner, Dominik, et al. “A Modified Levenberg–Marquardt Method for Estimating
    the Elastic Material Parameters of Polymer Waveguides Using Residuals between
    Autocorrelated Frequency Responses.” <i>Mechanical Systems and Signal Processing</i>,
    vol. 247, 2026, p. 113904, doi:<a href="https://doi.org/10.1016/j.ymssp.2026.113904">https://doi.org/10.1016/j.ymssp.2026.113904</a>.
  short: D. Itner, D. Dreiling, H. Gravenkamp, B. Henning, C. Birk, Mechanical Systems
    and Signal Processing 247 (2026) 113904.
date_created: 2026-01-29T08:53:42Z
date_updated: 2026-02-02T12:44:47Z
department:
- _id: '49'
doi: https://doi.org/10.1016/j.ymssp.2026.113904
intvolume: '       247'
keyword:
- Material parameter estimation
- Waveguide
- Nonlinear optimization
- Inverse problem
- Least squares
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.sciencedirect.com/science/article/pii/S0888327026000610/pdfft?md5=16e8493b44527f4ab0a6d13f634a01c3&pid=1-s2.0-S0888327026000610-main.pdf
oa: '1'
page: '113904'
project:
- _id: '89'
  name: Vollständige Bestimmung der akustischen Materialparameter von Polymeren
publication: Mechanical Systems and Signal Processing
publication_identifier:
  issn:
  - 0888-3270
publication_status: published
status: public
title: A modified Levenberg–Marquardt method for estimating the elastic material parameters
  of polymer waveguides using residuals between autocorrelated frequency responses
type: journal_article
user_id: '32616'
volume: 247
year: '2026'
...
---
_id: '64916'
abstract:
- lang: eng
  text: The joining of dissimilar materials, such as steel and aluminum, entails significant
    challenges during thermal curing processes due to differing coefficients of thermal
    expansion. This study addresses the formation of “viscous fingering” instabilities
    in structural adhesive joints, which are induced by thermally driven relative
    displacements during the liquid phase of the adhesive. Using a component-like
    specimen “bridge specimen,” the dependency of this phenomenon on process temperature
    and structural stiffness (rivet distance) was characterized. Experimental results
    reveal that while the relative displacement scales cubically with the free buckling
    length, the resulting adhesive area reduction follows an exponential trend, leading
    to a loss of effective bond area of up to 79%, which significantly compromises
    the joint strength in automotive applications. To predict these process-induced
    defects, a thermo-chemo-viscoelastic-viscoplastic adhesive model implemented in
    LS-DYNA was applied. The model combines curing kinetics, viscoelastic relaxation,
    and pressure-dependent plasticity and features a geometric damage parameter (D)
    that captures the adhesive area reduction caused by viscous fingering as an exponential
    function of the accumulated normal strain in the liquid phase. This damage parameter,
    calibrated on base-specimen level, was transferred to the component geometry.
    The simulation demonstrated high predictive accuracy with a maximum deviation
    of the adhesive area reduction of 3.1% compared to experimental data. This validates
    the model’s capability to predict manufacturing-induced damage in complex hybrid
    structures solely based on thermal boundary conditions.
article_type: original
author:
- first_name: Mohamad
  full_name: Al Trjman, Mohamad
  id: '65415'
  last_name: Al Trjman
- first_name: Felix
  full_name: Beule, Felix
  id: '66192'
  last_name: Beule
- first_name: Dominik
  full_name: Teutenberg, Dominik
  id: '537'
  last_name: Teutenberg
- first_name: Gerson
  full_name: Meschut, Gerson
  id: '32056'
  last_name: Meschut
  orcid: 0000-0002-2763-1246
- first_name: Julia
  full_name: Riese, Julia
  id: '101499'
  last_name: Riese
  orcid: 0000-0002-3053-0534
citation:
  ama: Al Trjman M, Beule F, Teutenberg D, Meschut G, Riese J. Experimental characterization
    and numerical analysis of the influence of the CED coating process on viscous
    fingering formation in hybrid-jointed mixed structures. <i>The Journal of Adhesion</i>.
    Published online 2026:1-24. doi:<a href="https://doi.org/10.1080/00218464.2026.2644394">10.1080/00218464.2026.2644394</a>
  apa: Al Trjman, M., Beule, F., Teutenberg, D., Meschut, G., &#38; Riese, J. (2026).
    Experimental characterization and numerical analysis of the influence of the CED
    coating process on viscous fingering formation in hybrid-jointed mixed structures.
    <i>The Journal of Adhesion</i>, 1–24. <a href="https://doi.org/10.1080/00218464.2026.2644394">https://doi.org/10.1080/00218464.2026.2644394</a>
  bibtex: '@article{Al Trjman_Beule_Teutenberg_Meschut_Riese_2026, title={Experimental
    characterization and numerical analysis of the influence of the CED coating process
    on viscous fingering formation in hybrid-jointed mixed structures}, DOI={<a href="https://doi.org/10.1080/00218464.2026.2644394">10.1080/00218464.2026.2644394</a>},
    journal={The Journal of Adhesion}, publisher={Informa UK Limited}, author={Al
    Trjman, Mohamad and Beule, Felix and Teutenberg, Dominik and Meschut, Gerson and
    Riese, Julia}, year={2026}, pages={1–24} }'
  chicago: Al Trjman, Mohamad, Felix Beule, Dominik Teutenberg, Gerson Meschut, and
    Julia Riese. “Experimental Characterization and Numerical Analysis of the Influence
    of the CED Coating Process on Viscous Fingering Formation in Hybrid-Jointed Mixed
    Structures.” <i>The Journal of Adhesion</i>, 2026, 1–24. <a href="https://doi.org/10.1080/00218464.2026.2644394">https://doi.org/10.1080/00218464.2026.2644394</a>.
  ieee: 'M. Al Trjman, F. Beule, D. Teutenberg, G. Meschut, and J. Riese, “Experimental
    characterization and numerical analysis of the influence of the CED coating process
    on viscous fingering formation in hybrid-jointed mixed structures,” <i>The Journal
    of Adhesion</i>, pp. 1–24, 2026, doi: <a href="https://doi.org/10.1080/00218464.2026.2644394">10.1080/00218464.2026.2644394</a>.'
  mla: Al Trjman, Mohamad, et al. “Experimental Characterization and Numerical Analysis
    of the Influence of the CED Coating Process on Viscous Fingering Formation in
    Hybrid-Jointed Mixed Structures.” <i>The Journal of Adhesion</i>, Informa UK Limited,
    2026, pp. 1–24, doi:<a href="https://doi.org/10.1080/00218464.2026.2644394">10.1080/00218464.2026.2644394</a>.
  short: M. Al Trjman, F. Beule, D. Teutenberg, G. Meschut, J. Riese, The Journal
    of Adhesion (2026) 1–24.
date_created: 2026-03-14T18:43:41Z
date_updated: 2026-03-14T19:04:46Z
ddc:
- '620'
- '670'
- '660'
department:
- _id: '9'
doi: 10.1080/00218464.2026.2644394
file:
- access_level: closed
  content_type: application/pdf
  creator: mohamada
  date_created: 2026-03-14T18:50:31Z
  date_updated: 2026-03-14T18:50:31Z
  file_id: '64917'
  file_name: Experimental characterization and numerical analysis of the influence
    of the CED coating process on viscous fingering formation in hybrid-jointed mixe.pdf
  file_size: 14668789
  relation: main_file
  success: 1
file_date_updated: 2026-03-14T18:50:31Z
has_accepted_license: '1'
keyword:
- Adhesive area reduction
- CED coating process
- delta alpha problem
- epoxy structural adhesive
- influence of manufacture
- multi-material design
- numerical simulation (FEM)
- relative displacements
- viscous fingering (saffman-taylor-instability).
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
page: 1-24
publication: The Journal of Adhesion
publication_identifier:
  issn:
  - 0021-8464
  - 1545-5823
publication_status: published
publisher: Informa UK Limited
status: public
title: Experimental characterization and numerical analysis of the influence of the
  CED coating process on viscous fingering formation in hybrid-jointed mixed structures
type: journal_article
user_id: '65415'
year: '2026'
...
---
_id: '43464'
abstract:
- lang: eng
  text: <jats:p>Lightweight design is a common approach to reduce energy demand in
    the use stage of vehicles. The production of lightweight materials is usually
    associated with an increase in energy demand, so the environmental impacts of
    lightweight structures need to be assessed holistically using a life cycle assessment.
    To estimate the life cycle environmental impacts of a product in its developmental
    stage, for example, by life cycle engineering, future changes in relevant influencing
    factors must be considered. Prospective life cycle assessment provides methods
    for integrating future scenarios into life cycle assessment studies. However,
    approaches for integrating prospective life cycle assessment into product development
    are limited. The objective of this work is to provide the methodological foundation
    for integrating future scenarios of relevant influencing factors in the development
    of lightweight structures. The applicability of the novel methodology is demonstrated
    by a case study of a structural component in a steel, aluminium, and hybrid design.
    The results show that appropriate decarbonisation measures can reduce the life
    cycle greenhouse gas emissions by up to 95 percent until 2050. We also found that
    shifts in the environmentally optimal design are possible in future scenarios.
    Therefore, the methodology and data provided contribute to improved decision-making
    in product development.</jats:p>
article_number: '3371'
author:
- first_name: Moritz
  full_name: Ostermann, Moritz
  id: '44763'
  last_name: Ostermann
  orcid: https://orcid.org/0000-0003-1146-0443
- first_name: Julian
  full_name: Grenz, Julian
  last_name: Grenz
- first_name: Marcel
  full_name: Triebus, Marcel
  id: '66036'
  last_name: Triebus
- first_name: Felipe
  full_name: Cerdas, Felipe
  last_name: Cerdas
- first_name: Thorsten
  full_name: Marten, Thorsten
  id: '338'
  last_name: Marten
- first_name: Thomas
  full_name: Tröster, Thomas
  id: '553'
  last_name: Tröster
- first_name: Christoph
  full_name: Herrmann, Christoph
  last_name: Herrmann
citation:
  ama: 'Ostermann M, Grenz J, Triebus M, et al. Integrating Prospective Scenarios
    in Life Cycle Engineering: Case Study of Lightweight Structures. <i>Energies</i>.
    2023;16(8). doi:<a href="https://doi.org/10.3390/en16083371">10.3390/en16083371</a>'
  apa: 'Ostermann, M., Grenz, J., Triebus, M., Cerdas, F., Marten, T., Tröster, T.,
    &#38; Herrmann, C. (2023). Integrating Prospective Scenarios in Life Cycle Engineering:
    Case Study of Lightweight Structures. <i>Energies</i>, <i>16</i>(8), Article 3371.
    <a href="https://doi.org/10.3390/en16083371">https://doi.org/10.3390/en16083371</a>'
  bibtex: '@article{Ostermann_Grenz_Triebus_Cerdas_Marten_Tröster_Herrmann_2023, title={Integrating
    Prospective Scenarios in Life Cycle Engineering: Case Study of Lightweight Structures},
    volume={16}, DOI={<a href="https://doi.org/10.3390/en16083371">10.3390/en16083371</a>},
    number={83371}, journal={Energies}, publisher={MDPI AG}, author={Ostermann, Moritz
    and Grenz, Julian and Triebus, Marcel and Cerdas, Felipe and Marten, Thorsten
    and Tröster, Thomas and Herrmann, Christoph}, year={2023} }'
  chicago: 'Ostermann, Moritz, Julian Grenz, Marcel Triebus, Felipe Cerdas, Thorsten
    Marten, Thomas Tröster, and Christoph Herrmann. “Integrating Prospective Scenarios
    in Life Cycle Engineering: Case Study of Lightweight Structures.” <i>Energies</i>
    16, no. 8 (2023). <a href="https://doi.org/10.3390/en16083371">https://doi.org/10.3390/en16083371</a>.'
  ieee: 'M. Ostermann <i>et al.</i>, “Integrating Prospective Scenarios in Life Cycle
    Engineering: Case Study of Lightweight Structures,” <i>Energies</i>, vol. 16,
    no. 8, Art. no. 3371, 2023, doi: <a href="https://doi.org/10.3390/en16083371">10.3390/en16083371</a>.'
  mla: 'Ostermann, Moritz, et al. “Integrating Prospective Scenarios in Life Cycle
    Engineering: Case Study of Lightweight Structures.” <i>Energies</i>, vol. 16,
    no. 8, 3371, MDPI AG, 2023, doi:<a href="https://doi.org/10.3390/en16083371">10.3390/en16083371</a>.'
  short: M. Ostermann, J. Grenz, M. Triebus, F. Cerdas, T. Marten, T. Tröster, C.
    Herrmann, Energies 16 (2023).
date_created: 2023-04-13T09:11:33Z
date_updated: 2023-04-13T09:19:56Z
department:
- _id: '9'
- _id: '321'
- _id: '149'
doi: 10.3390/en16083371
intvolume: '        16'
issue: '8'
keyword:
- Life Cycle Engineering
- Life Cycle Assessment
- Lightweight Design
- Prospective LCA
- Future-oriented LCA
- Energy System
- Material production
- Sustainable production
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.mdpi.com/1996-1073/16/8/3371
oa: '1'
publication: Energies
publication_identifier:
  issn:
  - 1996-1073
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: 'Integrating Prospective Scenarios in Life Cycle Engineering: Case Study of
  Lightweight Structures'
type: journal_article
user_id: '44763'
volume: 16
year: '2023'
...
---
_id: '43046'
abstract:
- lang: eng
  text: In the laser sintering technology, the semi-crystalline polymer material is
    exposed to elevated temperatures during processing, which leads to serious material
    ageing for most materials. This has already been investigated intensively by various
    authors. However, the ageing of the material at ambient temperatures during shelf
    life has not been the focus so far. The need to analyse the shelf life can be
    derived from an ecological and economic point of view. This work is focusing on
    the shelf life of PA2200 (PA12). To reduce the potential influences of powder
    production fluctuations, two different powder batches stored for 5.5 years and
    6.5 years are investigated and compared to a reference powder produced 0.5 years
    before these investigations. Multiple powder analyses and part characterisations
    have been performed. A significant yellowing and molecular chain length reduction
    can be derived from the measurement results. Whereas the influence on mechanical
    part performance was minor, the parts built with the stored powders are more yellowish.
    As it is most likely that this is due to the consumption of polyamide stabilisers,
    it can be assumed that these parts will be subject to significantly faster ageing.
    Therefore, it is still not recommended to use the stored powders for critical
    parts or light intense and humid environments.
author:
- first_name: Sven Helge
  full_name: Klippstein, Sven Helge
  id: '71545'
  last_name: Klippstein
- first_name: Ivo
  full_name: Kletetzka, Ivo
  id: '50769'
  last_name: Kletetzka
- first_name: Ilknur
  full_name: Sural, Ilknur
  last_name: Sural
- first_name: Hans-Joachim
  full_name: Schmid, Hans-Joachim
  id: '464'
  last_name: Schmid
  orcid: 000-0001-8590-1921
citation:
  ama: Klippstein SH, Kletetzka I, Sural I, Schmid H-J. Influence of a prolonged shelf
    time on PA12 laser sintering powder and resulting part properties. <i>The International
    Journal of Advanced Manufacturing Technology </i>. Published online 2023. doi:<a
    href="https://doi.org/10.1007/s00170-023-11243-1">https://doi.org/10.1007/s00170-023-11243-1</a>
  apa: Klippstein, S. H., Kletetzka, I., Sural, I., &#38; Schmid, H.-J. (2023). Influence
    of a prolonged shelf time on PA12 laser sintering powder and resulting part properties.
    <i>The International Journal of Advanced Manufacturing Technology </i>. <a href="https://doi.org/10.1007/s00170-023-11243-1">https://doi.org/10.1007/s00170-023-11243-1</a>
  bibtex: '@article{Klippstein_Kletetzka_Sural_Schmid_2023, title={Influence of a
    prolonged shelf time on PA12 laser sintering powder and resulting part properties},
    DOI={<a href="https://doi.org/10.1007/s00170-023-11243-1">https://doi.org/10.1007/s00170-023-11243-1</a>},
    journal={The International Journal of Advanced Manufacturing Technology }, publisher={Springer},
    author={Klippstein, Sven Helge and Kletetzka, Ivo and Sural, Ilknur and Schmid,
    Hans-Joachim}, year={2023} }'
  chicago: Klippstein, Sven Helge, Ivo Kletetzka, Ilknur Sural, and Hans-Joachim Schmid.
    “Influence of a Prolonged Shelf Time on PA12 Laser Sintering Powder and Resulting
    Part Properties.” <i>The International Journal of Advanced Manufacturing Technology
    </i>, 2023. <a href="https://doi.org/10.1007/s00170-023-11243-1">https://doi.org/10.1007/s00170-023-11243-1</a>.
  ieee: 'S. H. Klippstein, I. Kletetzka, I. Sural, and H.-J. Schmid, “Influence of
    a prolonged shelf time on PA12 laser sintering powder and resulting part properties,”
    <i>The International Journal of Advanced Manufacturing Technology </i>, 2023,
    doi: <a href="https://doi.org/10.1007/s00170-023-11243-1">https://doi.org/10.1007/s00170-023-11243-1</a>.'
  mla: Klippstein, Sven Helge, et al. “Influence of a Prolonged Shelf Time on PA12
    Laser Sintering Powder and Resulting Part Properties.” <i>The International Journal
    of Advanced Manufacturing Technology </i>, Springer, 2023, doi:<a href="https://doi.org/10.1007/s00170-023-11243-1">https://doi.org/10.1007/s00170-023-11243-1</a>.
  short: S.H. Klippstein, I. Kletetzka, I. Sural, H.-J. Schmid, The International
    Journal of Advanced Manufacturing Technology  (2023).
date_created: 2023-03-18T14:28:46Z
date_updated: 2023-09-07T11:57:59Z
department:
- _id: '150'
- _id: '624'
- _id: '219'
- _id: '9'
doi: https://doi.org/10.1007/s00170-023-11243-1
keyword:
- Selective laser sintering
- Shelf life
- Polyamide 12
- powder
- PA2200
- material ageing
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://link.springer.com/article/10.1007/s00170-023-11243-1
oa: '1'
publication: 'The International Journal of Advanced Manufacturing Technology '
publication_status: published
publisher: Springer
quality_controlled: '1'
status: public
title: Influence of a prolonged shelf time on PA12 laser sintering powder and resulting
  part properties
type: journal_article
user_id: '50769'
year: '2023'
...
---
_id: '34211'
abstract:
- lang: eng
  text: "Nowadays, clinching is a widely used joining technique, where sheets are
    joined by pure deformation to create an interlock without the need for auxiliary
    parts. This leads to advantages such as reduced joining time and manufacturing\r\ncosts.
    On the other hand, the joint strength solely relies on directed material deformation,
    which renders an accurate material modelling essential to reliably predict the
    joint forming. The formation of the joint locally involves large plastic strains
    and possibly complex non-proportional loading paths, as typical of many metal
    forming applications. Consequently, a finite plasticity formulation is utilised
    incorporating a Chaboche–Rousselier kinematic hardening law to capture the Bauschinger
    effect. Material parameters are identified from tension–compression tests on miniature
    spec-\r\nimens for the dual-phase steel HCT590X. The resulting material model
    is implemented in LS-Dyna to study the locally diverse loading paths and give
    a quantitative statement on the importance of kinematic hardening for clinching.
    It turns out that the Bauschinger effect mainly affects the springback of the
    sheets and has a smaller effect on the joint forming itself."
author:
- first_name: Johannes
  full_name: Friedlein, Johannes
  last_name: Friedlein
- first_name: Julia
  full_name: Mergheim, Julia
  last_name: Mergheim
- first_name: Paul
  full_name: Steinmann, Paul
  last_name: Steinmann
citation:
  ama: 'Friedlein J, Mergheim J, Steinmann P. Influence of Kinematic Hardening on
    Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal. In: <i>The Minerals, Metals
    &#38;amp; Materials Series</i>. Springer International Publishing; 2022. doi:<a
    href="https://doi.org/10.1007/978-3-031-06212-4_31">10.1007/978-3-031-06212-4_31</a>'
  apa: Friedlein, J., Mergheim, J., &#38; Steinmann, P. (2022). Influence of Kinematic
    Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal. In <i>The
    Minerals, Metals &#38;amp; Materials Series</i>. Springer International Publishing.
    <a href="https://doi.org/10.1007/978-3-031-06212-4_31">https://doi.org/10.1007/978-3-031-06212-4_31</a>
  bibtex: '@inbook{Friedlein_Mergheim_Steinmann_2022, place={Cham}, title={Influence
    of Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal},
    DOI={<a href="https://doi.org/10.1007/978-3-031-06212-4_31">10.1007/978-3-031-06212-4_31</a>},
    booktitle={The Minerals, Metals &#38;amp; Materials Series}, publisher={Springer
    International Publishing}, author={Friedlein, Johannes and Mergheim, Julia and
    Steinmann, Paul}, year={2022} }'
  chicago: 'Friedlein, Johannes, Julia Mergheim, and Paul Steinmann. “Influence of
    Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal.”
    In <i>The Minerals, Metals &#38;amp; Materials Series</i>. Cham: Springer International
    Publishing, 2022. <a href="https://doi.org/10.1007/978-3-031-06212-4_31">https://doi.org/10.1007/978-3-031-06212-4_31</a>.'
  ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “Influence of Kinematic Hardening
    on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal,” in <i>The Minerals,
    Metals &#38;amp; Materials Series</i>, Cham: Springer International Publishing,
    2022.'
  mla: Friedlein, Johannes, et al. “Influence of Kinematic Hardening on Clinch Joining
    of Dual-Phase Steel HCT590X Sheet Metal.” <i>The Minerals, Metals &#38;amp; Materials
    Series</i>, Springer International Publishing, 2022, doi:<a href="https://doi.org/10.1007/978-3-031-06212-4_31">10.1007/978-3-031-06212-4_31</a>.
  short: 'J. Friedlein, J. Mergheim, P. Steinmann, in: The Minerals, Metals &#38;amp;
    Materials Series, Springer International Publishing, Cham, 2022.'
date_created: 2022-12-05T21:01:29Z
date_updated: 2022-12-05T21:05:52Z
doi: 10.1007/978-3-031-06212-4_31
keyword:
- Clinching
- Material modelling
- Kinematic hardening
- Parameter identification
- Bauschinger effect
language:
- iso: eng
place: Cham
project:
- _id: '130'
  grant_number: '418701707'
  name: 'TRR 285: TRR 285'
- _id: '131'
  name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '139'
  name: 'TRR 285 – A05: TRR 285 - Subproject A05'
publication: The Minerals, Metals &amp; Materials Series
publication_identifier:
  isbn:
  - '9783031062117'
  - '9783031062124'
  issn:
  - 2367-1181
  - 2367-1696
publication_status: published
publisher: Springer International Publishing
status: public
title: Influence of Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X
  Sheet Metal
type: book_chapter
user_id: '7850'
year: '2022'
...
---
_id: '33988'
article_number: '2100396'
article_type: original
author:
- first_name: Elmar
  full_name: Moritzer, Elmar
  last_name: Moritzer
- first_name: Christine
  full_name: Driediger, Christine
  last_name: Driediger
citation:
  ama: Moritzer E, Driediger C. Reactive Direct Bonding of Digital Light Process Components.
    <i>Macromolecular Symposia</i>. 2022;404(1). doi:<a href="https://doi.org/10.1002/masy.202100396">10.1002/masy.202100396</a>
  apa: Moritzer, E., &#38; Driediger, C. (2022). Reactive Direct Bonding of Digital
    Light Process Components. <i>Macromolecular Symposia</i>, <i>404</i>(1), Article
    2100396. <a href="https://doi.org/10.1002/masy.202100396">https://doi.org/10.1002/masy.202100396</a>
  bibtex: '@article{Moritzer_Driediger_2022, title={Reactive Direct Bonding of Digital
    Light Process Components}, volume={404}, DOI={<a href="https://doi.org/10.1002/masy.202100396">10.1002/masy.202100396</a>},
    number={12100396}, journal={Macromolecular Symposia}, publisher={Wiley}, author={Moritzer,
    Elmar and Driediger, Christine}, year={2022} }'
  chicago: Moritzer, Elmar, and Christine Driediger. “Reactive Direct Bonding of Digital
    Light Process Components.” <i>Macromolecular Symposia</i> 404, no. 1 (2022). <a
    href="https://doi.org/10.1002/masy.202100396">https://doi.org/10.1002/masy.202100396</a>.
  ieee: 'E. Moritzer and C. Driediger, “Reactive Direct Bonding of Digital Light Process
    Components,” <i>Macromolecular Symposia</i>, vol. 404, no. 1, Art. no. 2100396,
    2022, doi: <a href="https://doi.org/10.1002/masy.202100396">10.1002/masy.202100396</a>.'
  mla: Moritzer, Elmar, and Christine Driediger. “Reactive Direct Bonding of Digital
    Light Process Components.” <i>Macromolecular Symposia</i>, vol. 404, no. 1, 2100396,
    Wiley, 2022, doi:<a href="https://doi.org/10.1002/masy.202100396">10.1002/masy.202100396</a>.
  short: E. Moritzer, C. Driediger, Macromolecular Symposia 404 (2022).
date_created: 2022-11-03T13:21:13Z
date_updated: 2022-11-03T13:32:18Z
department:
- _id: '9'
- _id: '367'
doi: 10.1002/masy.202100396
has_accepted_license: '1'
intvolume: '       404'
issue: '1'
keyword:
- digital light processing
- material combination
- reactive direct bonding
- vat photopolymerization
language:
- iso: eng
publication: Macromolecular Symposia
publication_identifier:
  issn:
  - 1022-1360
  - 1521-3900
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Reactive Direct Bonding of Digital Light Process Components
type: journal_article
user_id: '38770'
volume: 404
year: '2022'
...
---
_id: '22274'
abstract:
- lang: eng
  text: 'The use of high-strength steel and aluminium is rising due to the intensified
    efforts being made in lightweight design, and self-piercing riveting is becoming
    increasingly important. Conventional rivets for self-piercing riveting differ
    in their geometry, the material used, the condition of the material and the coating.
    To shorten the manufacturing process, the use of stainless steel with high strain
    hardening as the rivet material represents a promising approach. This allows the
    coating of the rivets to be omitted due to the corrosion resistance of the material
    and, since the strength of the stainless steel is achieved by cold forming, heat
    treatment is no longer required. In addition, it is possible to adjust the local
    strength within the rivet. Because of that, the authors have elaborated a concept
    for using high nitrogen steel 1.3815 as the rivet material. The present investigation
    focusses on the joint strength in order to evaluate the capability of rivets in
    high nitrogen steel by comparison to conventional rivets made of treatable steel.
    Due to certain challenges in the forming process of the high nitrogen steel rivets,
    deviations result from the targeted rivet geometry. Mainly these deviations cause
    a lower joint strength with these rivets, which is, however, adequate. All in
    all, the capability of the new rivet is proven by the results of this investigation. '
author:
- first_name: Benedikt
  full_name: Uhe, Benedikt
  id: '38131'
  last_name: Uhe
- first_name: Clara-Maria
  full_name: Kuball, Clara-Maria
  last_name: Kuball
- first_name: Marion
  full_name: Merklein, Marion
  last_name: Merklein
- first_name: Gerson
  full_name: Meschut, Gerson
  id: '32056'
  last_name: Meschut
  orcid: 0000-0002-2763-1246
citation:
  ama: 'Uhe B, Kuball C-M, Merklein M, Meschut G. Strength of self-piercing riveted
    Joints with conventional Rivets and Rivets made of High Nitrogen Steel. In: ;
    2021. doi:<a href="https://doi.org/10.25518/esaform21.1911">10.25518/esaform21.1911</a>'
  apa: Uhe, B., Kuball, C.-M., Merklein, M., &#38; Meschut, G. (2021). <i>Strength
    of self-piercing riveted Joints with conventional Rivets and Rivets made of High
    Nitrogen Steel</i>. 24th International Conference on Material Forming (ESAFORM),
    Liège, Belgien. <a href="https://doi.org/10.25518/esaform21.1911">https://doi.org/10.25518/esaform21.1911</a>
  bibtex: '@inproceedings{Uhe_Kuball_Merklein_Meschut_2021, title={Strength of self-piercing
    riveted Joints with conventional Rivets and Rivets made of High Nitrogen Steel},
    DOI={<a href="https://doi.org/10.25518/esaform21.1911">10.25518/esaform21.1911</a>},
    author={Uhe, Benedikt and Kuball, Clara-Maria and Merklein, Marion and Meschut,
    Gerson}, year={2021} }'
  chicago: Uhe, Benedikt, Clara-Maria Kuball, Marion Merklein, and Gerson Meschut.
    “Strength of Self-Piercing Riveted Joints with Conventional Rivets and Rivets
    Made of High Nitrogen Steel,” 2021. <a href="https://doi.org/10.25518/esaform21.1911">https://doi.org/10.25518/esaform21.1911</a>.
  ieee: 'B. Uhe, C.-M. Kuball, M. Merklein, and G. Meschut, “Strength of self-piercing
    riveted Joints with conventional Rivets and Rivets made of High Nitrogen Steel,”
    presented at the 24th International Conference on Material Forming (ESAFORM),
    Liège, Belgien, 2021, doi: <a href="https://doi.org/10.25518/esaform21.1911">10.25518/esaform21.1911</a>.'
  mla: Uhe, Benedikt, et al. <i>Strength of Self-Piercing Riveted Joints with Conventional
    Rivets and Rivets Made of High Nitrogen Steel</i>. 2021, doi:<a href="https://doi.org/10.25518/esaform21.1911">10.25518/esaform21.1911</a>.
  short: 'B. Uhe, C.-M. Kuball, M. Merklein, G. Meschut, in: 2021.'
conference:
  end_date: 2021-04-16
  location: Liège, Belgien
  name: 24th International Conference on Material Forming (ESAFORM)
  start_date: 2021-04-14
date_created: 2021-05-31T10:17:37Z
date_updated: 2026-02-27T10:25:13Z
department:
- _id: '157'
doi: 10.25518/esaform21.1911
keyword:
- Self-piercing Riveting
- Joining Technology
- Rivet Geometry
- Rivet Material
- High Nitrogen Steel
- Joint Strength
language:
- iso: eng
quality_controlled: '1'
status: public
title: Strength of self-piercing riveted Joints with conventional Rivets and Rivets
  made of High Nitrogen Steel
type: conference
user_id: '53912'
year: '2021'
...
---
_id: '19973'
abstract:
- lang: eng
  text: As a result of lightweight design, increased use is being made of high-strength
    steel and aluminium in car bodies. Self-piercing riveting is an established technique
    for joining these materials. The dissimilar properties of the two materials have
    led to a number of different rivet geometries in the past. Each rivet geometry
    fulfils the requirements of the materials within a limited range. In the present
    investigation, an improved rivet geometry is developed, which permits the reliable
    joining of two material combinations that could only be joined by two different
    rivet geometries up until now. Material combination 1 consists of high-strength
    steel on both sides, while material combination 2 comprises aluminium on the punch
    side and high-strength steel on the die side. The material flow and the stress
    and strain conditions prevailing during the joining process are analysed by means
    of numerical simulation. The rivet geometry is then improved step-by-step on the
    basis of this analysis. Finally, the improved rivet geometry is manufactured and
    the findings of the investigation are verified in experimental joining tests.
article_type: original
author:
- first_name: Benedikt
  full_name: Uhe, Benedikt
  id: '38131'
  last_name: Uhe
- first_name: Clara-Maria
  full_name: Kuball, Clara-Maria
  last_name: Kuball
- first_name: Marion
  full_name: Merklein, Marion
  last_name: Merklein
- first_name: Gerson
  full_name: Meschut, Gerson
  id: '32056'
  last_name: Meschut
  orcid: 0000-0002-2763-1246
citation:
  ama: Uhe B, Kuball C-M, Merklein M, Meschut G. Improvement of a rivet geometry for
    the self-piercing riveting of high-strength steel and multi-material joints. <i>Production
    Engineering</i>. 2020;14:417-423. doi:<a href="https://doi.org/10.1007/s11740-020-00973-w">10.1007/s11740-020-00973-w</a>
  apa: Uhe, B., Kuball, C.-M., Merklein, M., &#38; Meschut, G. (2020). Improvement
    of a rivet geometry for the self-piercing riveting of high-strength steel and
    multi-material joints. <i>Production Engineering</i>, <i>14</i>, 417–423. <a href="https://doi.org/10.1007/s11740-020-00973-w">https://doi.org/10.1007/s11740-020-00973-w</a>
  bibtex: '@article{Uhe_Kuball_Merklein_Meschut_2020, title={Improvement of a rivet
    geometry for the self-piercing riveting of high-strength steel and multi-material
    joints}, volume={14}, DOI={<a href="https://doi.org/10.1007/s11740-020-00973-w">10.1007/s11740-020-00973-w</a>},
    journal={Production Engineering}, author={Uhe, Benedikt and Kuball, Clara-Maria
    and Merklein, Marion and Meschut, Gerson}, year={2020}, pages={417–423} }'
  chicago: 'Uhe, Benedikt, Clara-Maria Kuball, Marion Merklein, and Gerson Meschut.
    “Improvement of a Rivet Geometry for the Self-Piercing Riveting of High-Strength
    Steel and Multi-Material Joints.” <i>Production Engineering</i> 14 (2020): 417–23.
    <a href="https://doi.org/10.1007/s11740-020-00973-w">https://doi.org/10.1007/s11740-020-00973-w</a>.'
  ieee: 'B. Uhe, C.-M. Kuball, M. Merklein, and G. Meschut, “Improvement of a rivet
    geometry for the self-piercing riveting of high-strength steel and multi-material
    joints,” <i>Production Engineering</i>, vol. 14, pp. 417–423, 2020, doi: <a href="https://doi.org/10.1007/s11740-020-00973-w">10.1007/s11740-020-00973-w</a>.'
  mla: Uhe, Benedikt, et al. “Improvement of a Rivet Geometry for the Self-Piercing
    Riveting of High-Strength Steel and Multi-Material Joints.” <i>Production Engineering</i>,
    vol. 14, 2020, pp. 417–23, doi:<a href="https://doi.org/10.1007/s11740-020-00973-w">10.1007/s11740-020-00973-w</a>.
  short: B. Uhe, C.-M. Kuball, M. Merklein, G. Meschut, Production Engineering 14
    (2020) 417–423.
date_created: 2020-10-12T08:14:13Z
date_updated: 2026-02-27T10:41:55Z
department:
- _id: '157'
doi: 10.1007/s11740-020-00973-w
intvolume: '        14'
keyword:
- Self-piercing riveting
- Joining technology
- Rivet geometry
- Multi-material design
- High-strength steel
- Aluminium
language:
- iso: eng
page: 417-423
publication: Production Engineering
publication_status: published
quality_controlled: '1'
status: public
title: Improvement of a rivet geometry for the self-piercing riveting of high-strength
  steel and multi-material joints
type: journal_article
user_id: '53912'
volume: 14
year: '2020'
...
---
_id: '15332'
abstract:
- lang: eng
  text: "Artificial intelligence (AI) has the potential for far-reaching – in our
    opinion – irreversible changes.\r\nThey range from effects on the individual and
    society to new societal and social issues. The question arises\r\nas to how students
    can learn the basic functioning of AI systems, what areas of life and society
    are affected\r\nby these and – most important – how their own lives are affected
    by these changes. Therefore, we are developing and evaluating school materials
    for the German ”Science Year AI”. It can be used for students of all\r\nschool
    types from the seventh grade upwards and will be distributed to about 2000 schools
    in autumn with\r\nthe support of the Federal Ministry of Education and Research.
    The material deals with the following aspects\r\nof AI: Discussing everyday experiences
    with AI, how does machine learning work, historical development\r\nof AI concepts,
    difference between man and machine, future distribution of roles between man and
    machine,\r\nin which AI world do we want to live and how much AI would we like
    to have in our lives. Through an\r\naccompanying evaluation, high quality of the
    technical content and didactic preparation is achieved in order\r\nto guarantee
    the long-term applicability in the teaching context in the different age groups
    and school types.\r\nIn this paper, we describe the current state of the material
    development, the challenges arising, and the results\r\nof tests with different
    classes to date. We also present first ideas for evaluating the results."
author:
- first_name: Michael
  full_name: Schlichtig, Michael
  id: '32312'
  last_name: Schlichtig
  orcid: 0000-0001-6600-6171
- first_name: Simone Anna
  full_name: Opel, Simone Anna
  id: '72932'
  last_name: Opel
- first_name: Lea
  full_name: Budde, Lea
  id: '32443'
  last_name: Budde
- first_name: Carsten
  full_name: Schulte, Carsten
  id: '60311'
  last_name: Schulte
citation:
  ama: 'Schlichtig M, Opel SA, Budde L, Schulte C. Understanding Artificial Intelligence
    – A Project for the Development of Comprehensive Teaching Material. In: Jasutė
    E, Pozdniakov S, eds. <i>ISSEP 2019 - 12th International Conference on Informatics
    in Schools: Situation, Evaluation and Perspectives, Local Proceedings</i>. Vol
    12. ; 2019:65-73.'
  apa: 'Schlichtig, M., Opel, S. A., Budde, L., &#38; Schulte, C. (2019). Understanding
    Artificial Intelligence – A Project for the Development of Comprehensive Teaching
    Material. In E. Jasutė &#38; S. Pozdniakov (Eds.), <i>ISSEP 2019 - 12th International
    conference on informatics in schools: Situation, evaluation and perspectives,
    Local Proceedings</i> (Vol. 12, pp. 65–73).'
  bibtex: '@inproceedings{Schlichtig_Opel_Budde_Schulte_2019, title={Understanding
    Artificial Intelligence – A Project for the Development of Comprehensive Teaching
    Material}, volume={12}, booktitle={ISSEP 2019 - 12th International conference
    on informatics in schools: Situation, evaluation and perspectives, Local Proceedings},
    author={Schlichtig, Michael and Opel, Simone Anna and Budde, Lea and Schulte,
    Carsten}, editor={Jasutė, Eglė and Pozdniakov, Sergei}, year={2019}, pages={65–73}
    }'
  chicago: 'Schlichtig, Michael, Simone Anna Opel, Lea Budde, and Carsten Schulte.
    “Understanding Artificial Intelligence – A Project for the Development of Comprehensive
    Teaching Material.” In <i>ISSEP 2019 - 12th International Conference on Informatics
    in Schools: Situation, Evaluation and Perspectives, Local Proceedings</i>, edited
    by Eglė Jasutė and Sergei Pozdniakov, 12:65–73, 2019.'
  ieee: 'M. Schlichtig, S. A. Opel, L. Budde, and C. Schulte, “Understanding Artificial
    Intelligence – A Project for the Development of Comprehensive Teaching Material,”
    in <i>ISSEP 2019 - 12th International conference on informatics in schools: Situation,
    evaluation and perspectives, Local Proceedings</i>, Lanarca, 2019, vol. 12, pp.
    65–73.'
  mla: 'Schlichtig, Michael, et al. “Understanding Artificial Intelligence – A Project
    for the Development of Comprehensive Teaching Material.” <i>ISSEP 2019 - 12th
    International Conference on Informatics in Schools: Situation, Evaluation and
    Perspectives, Local Proceedings</i>, edited by Eglė Jasutė and Sergei Pozdniakov,
    vol. 12, 2019, pp. 65–73.'
  short: 'M. Schlichtig, S.A. Opel, L. Budde, C. Schulte, in: E. Jasutė, S. Pozdniakov
    (Eds.), ISSEP 2019 - 12th International Conference on Informatics in Schools:
    Situation, Evaluation and Perspectives, Local Proceedings, 2019, pp. 65–73.'
conference:
  end_date: 2019-11-20
  location: Lanarca
  name: 'ISSEP 2019 - 12th International conference on informatics in schools: Situation,
    evaluation and perspectives'
  start_date: 2019-11-18
date_created: 2019-12-16T17:50:08Z
date_updated: 2022-07-26T11:41:41Z
department:
- _id: '67'
editor:
- first_name: Eglė
  full_name: Jasutė, Eglė
  last_name: Jasutė
- first_name: Sergei
  full_name: Pozdniakov, Sergei
  last_name: Pozdniakov
intvolume: '        12'
keyword:
- Artificial Intelligence
- Machine Learning
- Teaching Material
- Societal Aspects
- Ethics. Social Aspects
- Science Year
- Simulation Game
language:
- iso: eng
main_file_link:
- url: http://cyprusconferences.org/issep2019/wp-content/uploads/2019/10/LocalISSEP-v5.pdf
page: 65 - 73
publication: 'ISSEP 2019 - 12th International conference on informatics in schools:
  Situation, evaluation and perspectives, Local Proceedings'
publication_identifier:
  isbn:
  - 978-9925-553-27-3
publication_status: published
quality_controlled: '1'
status: public
title: Understanding Artificial Intelligence – A Project for the Development of Comprehensive
  Teaching Material
type: conference
user_id: '32312'
volume: 12
year: '2019'
...
---
_id: '12952'
author:
- first_name: Dmitrij
  full_name: Dreiling, Dmitrij
  id: '32616'
  last_name: Dreiling
- first_name: Nadine
  full_name: Feldmann, Nadine
  id: '23082'
  last_name: Feldmann
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
citation:
  ama: 'Dreiling D, Feldmann N, Henning B. A DC bias approach to the characterisation
    of non-linear material parameters of piezoelectric ceramics. In: AMA Service GmbH;
    2019. doi:<a href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>'
  apa: Dreiling, D., Feldmann, N., &#38; Henning, B. (2019). <i>A DC bias approach
    to the characterisation of non-linear material parameters of piezoelectric ceramics</i>.
    20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, Nürnberg. <a href="https://doi.org/10.5162/sensoren2019/5.1.2">https://doi.org/10.5162/sensoren2019/5.1.2</a>
  bibtex: '@inproceedings{Dreiling_Feldmann_Henning_2019, title={A DC bias approach
    to the characterisation of non-linear material parameters of piezoelectric ceramics},
    DOI={<a href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>},
    publisher={AMA Service GmbH}, author={Dreiling, Dmitrij and Feldmann, Nadine and
    Henning, Bernd}, year={2019} }'
  chicago: Dreiling, Dmitrij, Nadine Feldmann, and Bernd Henning. “A DC Bias Approach
    to the Characterisation of Non-Linear Material Parameters of Piezoelectric Ceramics.”
    AMA Service GmbH, 2019. <a href="https://doi.org/10.5162/sensoren2019/5.1.2">https://doi.org/10.5162/sensoren2019/5.1.2</a>.
  ieee: 'D. Dreiling, N. Feldmann, and B. Henning, “A DC bias approach to the characterisation
    of non-linear material parameters of piezoelectric ceramics,” presented at the
    20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, Nürnberg, 2019, doi: <a
    href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>.'
  mla: Dreiling, Dmitrij, et al. <i>A DC Bias Approach to the Characterisation of
    Non-Linear Material Parameters of Piezoelectric Ceramics</i>. AMA Service GmbH,
    2019, doi:<a href="https://doi.org/10.5162/sensoren2019/5.1.2">10.5162/sensoren2019/5.1.2</a>.
  short: 'D. Dreiling, N. Feldmann, B. Henning, in: AMA Service GmbH, 2019.'
conference:
  end_date: 2019-06-26
  location: Nürnberg
  name: 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019
  start_date: 2019-06-25
date_created: 2019-08-23T11:02:31Z
date_updated: 2026-01-05T08:28:49Z
department:
- _id: '49'
doi: 10.5162/sensoren2019/5.1.2
keyword:
- piezoelectric materials
- piezoelectric properties
- DC bias field
- non-linear material parameters
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.ama-science.org/proceedings/getFile/ZmDmAN
oa: '1'
project:
- _id: '90'
  name: Ein modellbasiertes Messverfahren zur Charakterisierung der frequenzabhängigen
    Materialeigenschaften von Piezokeramiken unter Verwendung eines einzelnen Probekörperindividuums
- _id: '245'
  name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
    für Leistungsschallanwendungen (NEPTUN)'
publisher: AMA Service GmbH
status: public
title: A DC bias approach to the characterisation of non-linear material parameters
  of piezoelectric ceramics
type: conference
user_id: '32616'
year: '2019'
...
---
_id: '6567'
author:
- first_name: Sarah
  full_name: Johannesmann, Sarah
  id: '29190'
  last_name: Johannesmann
- first_name: Julia
  full_name: Düchting, Julia
  last_name: Düchting
- first_name: Manuel
  full_name: Webersen, Manuel
  id: '11289'
  last_name: Webersen
  orcid: 0000-0001-6411-4232
- first_name: Leander
  full_name: Claes, Leander
  id: '11829'
  last_name: Claes
  orcid: 0000-0002-4393-268X
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
citation:
  ama: Johannesmann S, Düchting J, Webersen M, Claes L, Henning B. An acoustic waveguide-based
    approach to the complete characterisation of linear elastic, orthotropic material
    behaviour. <i>tm - Technisches Messen</i>. 2018;2018(85):478-486. doi:<a href="https://doi.org/10.1515/teme-2017-0132">10.1515/teme-2017-0132</a>
  apa: Johannesmann, S., Düchting, J., Webersen, M., Claes, L., &#38; Henning, B.
    (2018). An acoustic waveguide-based approach to the complete characterisation
    of linear elastic, orthotropic material behaviour. <i>Tm - Technisches Messen</i>,
    <i>2018</i>(85), 478–486. <a href="https://doi.org/10.1515/teme-2017-0132">https://doi.org/10.1515/teme-2017-0132</a>
  bibtex: '@article{Johannesmann_Düchting_Webersen_Claes_Henning_2018, title={An acoustic
    waveguide-based approach to the complete characterisation of linear elastic, orthotropic
    material behaviour}, volume={2018}, DOI={<a href="https://doi.org/10.1515/teme-2017-0132">10.1515/teme-2017-0132</a>},
    number={85}, journal={tm - Technisches Messen}, author={Johannesmann, Sarah and
    Düchting, Julia and Webersen, Manuel and Claes, Leander and Henning, Bernd}, year={2018},
    pages={478–486} }'
  chicago: 'Johannesmann, Sarah, Julia Düchting, Manuel Webersen, Leander Claes, and
    Bernd Henning. “An Acoustic Waveguide-Based Approach to the Complete Characterisation
    of Linear Elastic, Orthotropic Material Behaviour.” <i>Tm - Technisches Messen</i>
    2018, no. 85 (2018): 478–86. <a href="https://doi.org/10.1515/teme-2017-0132">https://doi.org/10.1515/teme-2017-0132</a>.'
  ieee: S. Johannesmann, J. Düchting, M. Webersen, L. Claes, and B. Henning, “An acoustic
    waveguide-based approach to the complete characterisation of linear elastic, orthotropic
    material behaviour,” <i>tm - Technisches Messen</i>, vol. 2018, no. 85, pp. 478–486,
    2018.
  mla: Johannesmann, Sarah, et al. “An Acoustic Waveguide-Based Approach to the Complete
    Characterisation of Linear Elastic, Orthotropic Material Behaviour.” <i>Tm - Technisches
    Messen</i>, vol. 2018, no. 85, 2018, pp. 478–86, doi:<a href="https://doi.org/10.1515/teme-2017-0132">10.1515/teme-2017-0132</a>.
  short: S. Johannesmann, J. Düchting, M. Webersen, L. Claes, B. Henning, Tm - Technisches
    Messen 2018 (2018) 478–486.
date_created: 2019-01-09T14:37:15Z
date_updated: 2022-01-06T07:03:12Z
department:
- _id: '49'
doi: 10.1515/teme-2017-0132
intvolume: '      2018'
issue: '85'
keyword:
- Continous-fibre reinforced plastics
- material parameters
- orthotropy
- ultrasonics
language:
- iso: eng
page: 478-486
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '88'
  grant_number: '260306237'
  name: Ermittlung des hydrothermischen Alterungsverhaltens endlosfaserverstärkter
    Thermoplaste und Entwicklung eines ultraschallbasierten Messsystems zur zerstörungsfreien
    Charakterisierung des Alterungszustands für die Komponentenüberwachung und Restlebenszeitprädiktion
publication: tm - Technisches Messen
publication_identifier:
  issn:
  - 0171-8096
quality_controlled: '1'
status: public
title: An acoustic waveguide-based approach to the complete characterisation of linear
  elastic, orthotropic material behaviour
type: journal_article
user_id: '11829'
volume: 2018
year: '2018'
...
---
_id: '6551'
author:
- first_name: Fabian
  full_name: Bause, Fabian
  last_name: Bause
- first_name: Jens
  full_name: Rautenberg, Jens
  last_name: Rautenberg
- first_name: Nadine
  full_name: Feldmann, Nadine
  id: '23082'
  last_name: Feldmann
- first_name: Manuel
  full_name: Webersen, Manuel
  id: '11289'
  last_name: Webersen
  orcid: 0000-0001-6411-4232
- first_name: Leander
  full_name: Claes, Leander
  id: '11829'
  last_name: Claes
  orcid: 0000-0002-4393-268X
- first_name: Hauke
  full_name: Gravenkamp, Hauke
  last_name: Gravenkamp
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
citation:
  ama: Bause F, Rautenberg J, Feldmann N, et al. Ultrasonic transmission measurements
    in the characterization of viscoelasticity utilizing polymeric waveguides. <i>Measurement
    Science and Technology</i>. 2016;27(10). doi:<a href="https://doi.org/10.1088/0957-0233/27/10/105601">10.1088/0957-0233/27/10/105601</a>
  apa: Bause, F., Rautenberg, J., Feldmann, N., Webersen, M., Claes, L., Gravenkamp,
    H., &#38; Henning, B. (2016). Ultrasonic transmission measurements in the characterization
    of viscoelasticity utilizing polymeric waveguides. <i>Measurement Science and
    Technology</i>, <i>27</i>(10). <a href="https://doi.org/10.1088/0957-0233/27/10/105601">https://doi.org/10.1088/0957-0233/27/10/105601</a>
  bibtex: '@article{Bause_Rautenberg_Feldmann_Webersen_Claes_Gravenkamp_Henning_2016,
    title={Ultrasonic transmission measurements in the characterization of viscoelasticity
    utilizing polymeric waveguides}, volume={27}, DOI={<a href="https://doi.org/10.1088/0957-0233/27/10/105601">10.1088/0957-0233/27/10/105601</a>},
    number={10}, journal={Measurement Science and Technology}, author={Bause, Fabian
    and Rautenberg, Jens and Feldmann, Nadine and Webersen, Manuel and Claes, Leander
    and Gravenkamp, Hauke and Henning, Bernd}, year={2016} }'
  chicago: Bause, Fabian, Jens Rautenberg, Nadine Feldmann, Manuel Webersen, Leander
    Claes, Hauke Gravenkamp, and Bernd Henning. “Ultrasonic Transmission Measurements
    in the Characterization of Viscoelasticity Utilizing Polymeric Waveguides.” <i>Measurement
    Science and Technology</i> 27, no. 10 (2016). <a href="https://doi.org/10.1088/0957-0233/27/10/105601">https://doi.org/10.1088/0957-0233/27/10/105601</a>.
  ieee: F. Bause <i>et al.</i>, “Ultrasonic transmission measurements in the characterization
    of viscoelasticity utilizing polymeric waveguides,” <i>Measurement Science and
    Technology</i>, vol. 27, no. 10, 2016.
  mla: Bause, Fabian, et al. “Ultrasonic Transmission Measurements in the Characterization
    of Viscoelasticity Utilizing Polymeric Waveguides.” <i>Measurement Science and
    Technology</i>, vol. 27, no. 10, 2016, doi:<a href="https://doi.org/10.1088/0957-0233/27/10/105601">10.1088/0957-0233/27/10/105601</a>.
  short: F. Bause, J. Rautenberg, N. Feldmann, M. Webersen, L. Claes, H. Gravenkamp,
    B. Henning, Measurement Science and Technology 27 (2016).
date_created: 2019-01-09T14:36:57Z
date_updated: 2022-01-06T07:03:11Z
department:
- _id: '49'
doi: 10.1088/0957-0233/27/10/105601
intvolume: '        27'
issue: '10'
keyword:
- material characterization
- material parameters
- acoustic waveguide
- daming
- ultrasonic transducer
language:
- iso: eng
project:
- _id: '52'
  name: Computing Resources Provided by the Paderborn Center for Parallel Computing
- _id: '87'
  grant_number: '222271124'
  name: Bestimmung komplexer akustischer Materialkenngrößen
publication: Measurement Science and Technology
quality_controlled: '1'
status: public
title: Ultrasonic transmission measurements in the characterization of viscoelasticity
  utilizing polymeric waveguides
type: journal_article
user_id: '23082'
volume: 27
year: '2016'
...
---
_id: '24751'
abstract:
- lang: ger
  text: 'Das Thema der vorliegenden Dissertation ist die "Prozessqualifizierung zur
    verlässlichen Herstellung von Produkten im Polymer Lasersinterverfahren". Über
    eine definierte Qualitätsprozesskette werden sämtliche, auf die Produktqualität
    relevanten Einflussparameter, bestimmt und berücksichtigt. Unterschiedliche Methoden
    zur Materialcharakterisierung des pulverförmigen Ausgangsmaterials werden analysiert
    und bewertet. Rheologische sowie chemische Eigenschaften, aber auch die Partikelgrößenverteilung
    oder die Schüttdichte werden hinsichtlich Relevanz, Einfluss und Anwenderfreundlichkeit
    untersucht. Das Ziel ist eine sinnvolle Bestimmung des Ausgangszustandes des Pulvers
    anhand definierter, relevanter Materialeigenschaften, um reproduzierbare technische
    Bauteileigenschaften zu gewährleisten. Dazu werden mechanische, dynamisch-mechanische,
    physikalische, elektrische, thermische sowie chemische Untersuchungen durchgeführt
    und hinsichtlich wichtiger Einflussparameter evaluiert. Die Bestimmung erfolgt
    über entwickelte Referenzjobs, in denen die hauptsächlichen Einflussfaktoren auf
    das Polymer-Lasersinterverfahren entlang der Qualitätsprozesskette berücksichtigt
    werden. Die charakterisierten Daten dienen zur Auslegung eines fiktiven Produktes
    aus der Luftfahrtindustrie. Mit Hilfe dieser Methoden lassen sich Materialkennwerte
    für diverse Simulationstools eindeutig bestimmen um eine realitätsnahe Berechnung
    zu gewährleisten. '
author:
- first_name: Stefan
  full_name: Rüsenberg, Stefan
  last_name: Rüsenberg
citation:
  ama: Rüsenberg S. <i>Prozessqualifizierung zur verlässlichen Herstellung von Produkten
    im Polymer Lasersinterverfahren</i>. Vol Band, 2. Shaker Verlag GmbH; 2015.
  apa: 'Rüsenberg, S. (2015). <i>Prozessqualifizierung zur verlässlichen Herstellung
    von Produkten im Polymer Lasersinterverfahren: Vol. Band, 2</i>. Shaker Verlag
    GmbH.'
  bibtex: '@book{Rüsenberg_2015, place={Düren}, series={Forschungsberichte des Direct
    Manufacturing Research Centers}, title={Prozessqualifizierung zur verlässlichen
    Herstellung von Produkten im Polymer Lasersinterverfahren}, volume={Band, 2},
    publisher={Shaker Verlag GmbH}, author={Rüsenberg, Stefan}, year={2015}, collection={Forschungsberichte
    des Direct Manufacturing Research Centers} }'
  chicago: 'Rüsenberg, Stefan. <i>Prozessqualifizierung zur verlässlichen Herstellung
    von Produkten im Polymer Lasersinterverfahren</i>. Vol. Band, 2. Forschungsberichte
    des Direct Manufacturing Research Centers. Düren: Shaker Verlag GmbH, 2015.'
  ieee: 'S. Rüsenberg, <i>Prozessqualifizierung zur verlässlichen Herstellung von
    Produkten im Polymer Lasersinterverfahren</i>, vol. Band, 2. Düren: Shaker Verlag
    GmbH, 2015.'
  mla: Rüsenberg, Stefan. <i>Prozessqualifizierung zur verlässlichen Herstellung von
    Produkten im Polymer Lasersinterverfahren</i>. Shaker Verlag GmbH, 2015.
  short: S. Rüsenberg, Prozessqualifizierung zur verlässlichen Herstellung von Produkten
    im Polymer Lasersinterverfahren, Shaker Verlag GmbH, Düren, 2015.
date_created: 2021-09-21T11:17:14Z
date_updated: 2022-01-06T06:56:33Z
department:
- _id: '150'
- _id: '624'
- _id: '219'
keyword:
- Additive Fertigung
- Polymere
- Lasersintern
- Methode
- Qualität
- Konstruktion
- Eigenschaften
- Material
- Charakterisierung
- Qualifizierung
language:
- iso: ger
main_file_link:
- url: https://www.shaker.de/de/content/catalogue/index.asp?lang=de&ID=8&ISBN=978-3-8440-3507-0&search=yes
page: '242'
place: Düren
publication_identifier:
  unknown:
  - 978-3-8440-3507-0
publication_status: published
publisher: Shaker Verlag GmbH
series_title: Forschungsberichte des Direct Manufacturing Research Centers
status: public
supervisor:
- first_name: Hans-Joachim
  full_name: Schmid, Hans-Joachim
  id: '464'
  last_name: Schmid
title: Prozessqualifizierung zur verlässlichen Herstellung von Produkten im Polymer
  Lasersinterverfahren
type: dissertation
user_id: '71545'
volume: Band, 2
year: '2015'
...
---
_id: '9952'
abstract:
- lang: eng
  text: The contact between viscoelastic materials e.g. elastomers and a rough surface
    leads to a special friction characteristic, which differs greatly in its properties
    comparing to other materials like metals. In practice, this friction combination
    occurs for example in the tire-road contact, or in the use of rubber gaskets.
    Due to the frictional forces a system is significantly influenced in its vibrational
    properties. The friction force is composed of two main components adhesion and
    hysteresis. The adhesion results from molecular bounds between the contact partners,
    while the deformation of the viscoelastic material by the roughness of the counter
    body leads to power loss. This internal friction results in an additional frictional
    force, which is described by the hysteresis. To simulate the frictional behaviour
    of elastomers on rough surfaces and thus to determine the energy dissipation in
    contact, it is necessary to develop a mechanical model which considers the roughness
    of the contact partners, as well as dynamic effects and the dependence on normal
    pressure and sliding speed. The viscoelastic material behaviour must also be considered.
    The contact between two rough surfaces is modelled as a rough rigid layer contacting
    a rough elas- tic layer. The elastic layer is modelled by point masses connected
    by Maxwell-elements. This allows the viscoelastic properties of the elastomer
    to be considered. The behaviour of whole system can be described by equations
    of motion with integrated constraints. The degrees of freedom of the model depends
    on the varying contact conditions. A point mass not in contact has two degrees
    of freedom. A point mass in contact moving along the roughness path can be described
    by only one degree of freedom. For each Maxwell-Element also an inner coordinate
    and thus a further degree of freedom is needed. Because of varying contact conditions
    dur- ing the simulation, the simulation interrupts in case the contact conditions
    change. Then the equations of motions are adapted with respect to the contact
    constraints. As a result of the simulation one obtain the energy dissipation and
    thus the friction char- acteristic during the friction process. It is possible
    to use these results in three dimensional point-contact elements in order to model
    contact surfaces on lager length scales.
author:
- first_name: Frank
  full_name: Schulte, Frank
  last_name: Schulte
- first_name: Jan
  full_name: Neuhaus, Jan
  last_name: Neuhaus
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: 'Schulte F, Neuhaus J, Sextro W. A Mechanical Model for the Dynamical Contact
    of Elastic Rough Bodies with Viscoelastic Properties. In: <i>Proceedings of ICoEV
    2015 International Conference on Engineering Vibration</i>. ; 2015:1109-1117.'
  apa: Schulte, F., Neuhaus, J., &#38; Sextro, W. (2015). A Mechanical Model for the
    Dynamical Contact of Elastic Rough Bodies with Viscoelastic Properties. In <i>Proceedings
    of ICoEV 2015 International Conference on Engineering Vibration</i> (pp. 1109–1117).
  bibtex: '@inproceedings{Schulte_Neuhaus_Sextro_2015, title={A Mechanical Model for
    the Dynamical Contact of Elastic Rough Bodies with Viscoelastic Properties}, booktitle={Proceedings
    of ICoEV 2015 International Conference on Engineering Vibration}, author={Schulte,
    Frank and Neuhaus, Jan and Sextro, Walter}, year={2015}, pages={1109–1117} }'
  chicago: Schulte, Frank, Jan Neuhaus, and Walter Sextro. “A Mechanical Model for
    the Dynamical Contact of Elastic Rough Bodies with Viscoelastic Properties.” In
    <i>Proceedings of ICoEV 2015 International Conference on Engineering Vibration</i>,
    1109–17, 2015.
  ieee: F. Schulte, J. Neuhaus, and W. Sextro, “A Mechanical Model for the Dynamical
    Contact of Elastic Rough Bodies with Viscoelastic Properties,” in <i>Proceedings
    of ICoEV 2015 International Conference on Engineering Vibration</i>, 2015, pp.
    1109–1117.
  mla: Schulte, Frank, et al. “A Mechanical Model for the Dynamical Contact of Elastic
    Rough Bodies with Viscoelastic Properties.” <i>Proceedings of ICoEV 2015 International
    Conference on Engineering Vibration</i>, 2015, pp. 1109–17.
  short: 'F. Schulte, J. Neuhaus, W. Sextro, in: Proceedings of ICoEV 2015 International
    Conference on Engineering Vibration, 2015, pp. 1109–1117.'
date_created: 2019-05-27T08:37:22Z
date_updated: 2019-09-16T10:47:53Z
department:
- _id: '151'
keyword:
- Contact Mechanics
- Viscoelastic Material
- Adhesive Friction
- Hysteresis Friction
- Energy Dissipation
- Vibration
language:
- iso: eng
page: 1109-1117
publication: Proceedings of ICoEV 2015 International Conference on Engineering Vibration
quality_controlled: '1'
status: public
title: A Mechanical Model for the Dynamical Contact of Elastic Rough Bodies with Viscoelastic
  Properties
type: conference
user_id: '55222'
year: '2015'
...
---
_id: '13892'
abstract:
- lang: eng
  text: Several ultrasonic approaches for material determination are formulated in
    terms of an (nonlinear) inverse problem, e.g. immersion technique (Castaings et
    al. (2000)) or plate-waveguide techniques (Marzani et al. (2012)). In this contribution
    we focus on cylindrical waveguides for ultrasonic material determination and especially
    on the sensitivity of recorded transmission signals to the material properties.
    We utilize composite scaled sensitivities to determine the information content
    that can be achieved by the setup to certain parameters and discuss the limitations
    of the approach.
author:
- first_name: Fabian
  full_name: Bause, Fabian
  last_name: Bause
- first_name: Hauke
  full_name: Gravenkamp, Hauke
  last_name: Gravenkamp
- first_name: Jens
  full_name: Rautenberg, Jens
  last_name: Rautenberg
- first_name: Bernd
  full_name: Henning, Bernd
  id: '213'
  last_name: Henning
citation:
  ama: 'Bause F, Gravenkamp H, Rautenberg J, Henning B. Model based sensitivity analysis
    in the determination of viscoelastic material properties using transmission measurements
    through circular waveguides. In: ; 2015:204-207.'
  apa: Bause, F., Gravenkamp, H., Rautenberg, J., &#38; Henning, B. (2015). Model
    based sensitivity analysis in the determination of viscoelastic material properties
    using transmission measurements through circular waveguides (pp. 204–207).
  bibtex: '@inproceedings{Bause_Gravenkamp_Rautenberg_Henning_2015, title={Model based
    sensitivity analysis in the determination of viscoelastic material properties
    using transmission measurements through circular waveguides}, author={Bause, Fabian
    and Gravenkamp, Hauke and Rautenberg, Jens and Henning, Bernd}, year={2015}, pages={204–207}
    }'
  chicago: Bause, Fabian, Hauke Gravenkamp, Jens Rautenberg, and Bernd Henning. “Model
    Based Sensitivity Analysis in the Determination of Viscoelastic Material Properties
    Using Transmission Measurements through Circular Waveguides,” 204–7, 2015.
  ieee: F. Bause, H. Gravenkamp, J. Rautenberg, and B. Henning, “Model based sensitivity
    analysis in the determination of viscoelastic material properties using transmission
    measurements through circular waveguides,” 2015, pp. 204–207.
  mla: Bause, Fabian, et al. <i>Model Based Sensitivity Analysis in the Determination
    of Viscoelastic Material Properties Using Transmission Measurements through Circular
    Waveguides</i>. 2015, pp. 204–07.
  short: 'F. Bause, H. Gravenkamp, J. Rautenberg, B. Henning, in: 2015, pp. 204–207.'
date_created: 2019-10-16T14:23:19Z
date_updated: 2022-01-06T06:51:46Z
department:
- _id: '49'
keyword:
- Sensitivity inverse problem ultrasonic material determination
language:
- iso: eng
page: 204-207
status: public
title: Model based sensitivity analysis in the determination of viscoelastic material
  properties using transmission measurements through circular waveguides
type: conference
user_id: '15911'
year: '2015'
...
---
_id: '9866'
abstract:
- lang: eng
  text: The hydrothermal method utilizes a solution-based chemical reaction to synthesize
    piezoelectric thin films and powders. This method has a number of advantages,
    such as low-temperature synthesis, and high purity and high quality of the product.
    In order to promote hydrothermal reactions, we developed an ultrasonic assisted
    hydrothermal method and confirmed that it produces dense and thick lead--zirconate--titanate
    (PZT) films. In the hydrothermal method, a crystal growth process follows the
    nucleation process. In this study, we verified that ultrasonic irradiation is
    effective for the nucleation process, and there is an optimum irradiation period
    to obtain thicker PZT films. With this optimization, a 9.2-$\mu$ m-thick PZT polycrystalline
    film was obtained in a single deposition process. For this film, ultrasonic irradiation
    was carried out from the beginning of the reaction for 18 h, followed by a 6 h
    deposition without ultrasonic irradiation. These results indicate that the ultrasonic
    irradiation mainly promotes the nucleation process.
author:
- first_name: Kanako
  full_name: Ohta, Kanako
  last_name: Ohta
- first_name: Gaku
  full_name: Isobe, Gaku
  last_name: Isobe
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
citation:
  ama: Ohta K, Isobe G, Bornmann P, Hemsel T, Morita T. Study on optimizing ultrasonic
    irradiation period for thick polycrystalline PZT film by hydrothermal method.
    <i>Ultrasonics</i>. 2013;53(4):837-841. doi:<a href="https://doi.org/10.1016/j.ultras.2012.12.003">10.1016/j.ultras.2012.12.003</a>
  apa: Ohta, K., Isobe, G., Bornmann, P., Hemsel, T., &#38; Morita, T. (2013). Study
    on optimizing ultrasonic irradiation period for thick polycrystalline PZT film
    by hydrothermal method. <i>Ultrasonics</i>, <i>53</i>(4), 837–841. <a href="https://doi.org/10.1016/j.ultras.2012.12.003">https://doi.org/10.1016/j.ultras.2012.12.003</a>
  bibtex: '@article{Ohta_Isobe_Bornmann_Hemsel_Morita_2013, title={Study on optimizing
    ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal
    method}, volume={53}, DOI={<a href="https://doi.org/10.1016/j.ultras.2012.12.003">10.1016/j.ultras.2012.12.003</a>},
    number={4}, journal={Ultrasonics}, author={Ohta, Kanako and Isobe, Gaku and Bornmann,
    Peter and Hemsel, Tobias and Morita, Takeshi}, year={2013}, pages={837–841} }'
  chicago: 'Ohta, Kanako, Gaku Isobe, Peter Bornmann, Tobias Hemsel, and Takeshi Morita.
    “Study on Optimizing Ultrasonic Irradiation Period for Thick Polycrystalline PZT
    Film by Hydrothermal Method.” <i>Ultrasonics</i> 53, no. 4 (2013): 837–41. <a
    href="https://doi.org/10.1016/j.ultras.2012.12.003">https://doi.org/10.1016/j.ultras.2012.12.003</a>.'
  ieee: K. Ohta, G. Isobe, P. Bornmann, T. Hemsel, and T. Morita, “Study on optimizing
    ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal
    method,” <i>Ultrasonics</i>, vol. 53, no. 4, pp. 837–841, 2013.
  mla: Ohta, Kanako, et al. “Study on Optimizing Ultrasonic Irradiation Period for
    Thick Polycrystalline PZT Film by Hydrothermal Method.” <i>Ultrasonics</i>, vol.
    53, no. 4, 2013, pp. 837–41, doi:<a href="https://doi.org/10.1016/j.ultras.2012.12.003">10.1016/j.ultras.2012.12.003</a>.
  short: K. Ohta, G. Isobe, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics 53 (2013)
    837–841.
date_created: 2019-05-20T12:03:07Z
date_updated: 2019-09-16T10:54:27Z
department:
- _id: '151'
doi: 10.1016/j.ultras.2012.12.003
intvolume: '        53'
issue: '4'
keyword:
- Piezoelectric material
language:
- iso: eng
page: 837 - 841
publication: Ultrasonics
publication_identifier:
  issn:
  - 0041-624X
quality_controlled: '1'
status: public
title: Study on optimizing ultrasonic irradiation period for thick polycrystalline
  PZT film by hydrothermal method
type: journal_article
user_id: '55222'
volume: 53
year: '2013'
...
---
_id: '9758'
abstract:
- lang: eng
  text: As a lead-free piezoelectric ceramics, (K,Na)NbO$_{3}$ is a promising material
    because of its good piezoelectric properties. In this study, (K$_{1-x}$Na$_{x}$)NbO$_{3}$
    ceramics were synthesized from a KNbO$_{3}$ and NaNbO$_{3}$ mixture powder prepared
    by the hydrothermal reaction. The hydrothermal reaction enables the production
    of high quality powder for the ceramics fabrication process. To obtain (K$_{1-x}$Na$_{x}$)NbO$_{3}$
    ceramics, these two powders KNbO$_{3}$ and NaNbO$_{3}$ were mixed and then sintered
    together. X-Ray diffraction analysis revealed that the solid solution ceramics
    (K$_{1-x}$Na$_{x}$)NbO$_{3}$ was produced by the sintering process. The K/Na ratio
    in (K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics was optimized for the best piezoelectric
    properties. The optimized forms was (K$_{0.48}$Na$_{0.52}$)NbO$_{3}$, which showed
    the following piezoelectric properties; k$_{33}$=0.56, d$_{33}$=114pC/N. In addition,
    the ferroelectric properties, P$_{r}$=7.72mC/cm$^{2}$, E$_{c}$=857V/mm, and the
    Curie temperature T$_{c}$=420$_{o}$C were also measured.
author:
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Norihito
  full_name: Takiguchi, Norihito
  last_name: Takiguchi
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
- first_name: Mutsuo
  full_name: Ishikawa, Mutsuo
  last_name: Ishikawa
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
citation:
  ama: Maeda T, Takiguchi N, Morita T, Ishikawa M, Hemsel T. Hydrothermal (K1-xNax)NbO3
    Lead-free Piezoelectric Ceramics. <i>Journal of Korean Physical Society</i>. 2010;57(4):924-928.
    doi:<a href="https://doi.org/10.3938/jkps.57.924">10.3938/jkps.57.924</a>
  apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., &#38; Hemsel, T. (2010).
    Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics. <i>Journal of Korean
    Physical Society</i>, <i>57</i>(4), 924–928. <a href="https://doi.org/10.3938/jkps.57.924">https://doi.org/10.3938/jkps.57.924</a>
  bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={Hydrothermal
    (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics}, volume={57}, DOI={<a href="https://doi.org/10.3938/jkps.57.924">10.3938/jkps.57.924</a>},
    number={4}, journal={Journal of Korean Physical Society}, author={Maeda, Takafumi
    and Takiguchi, Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias},
    year={2010}, pages={924–928} }'
  chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa,
    and Tobias Hemsel. “Hydrothermal (K1-XNax)NbO3 Lead-Free Piezoelectric Ceramics.”
    <i>Journal of Korean Physical Society</i> 57, no. 4 (2010): 924–28. <a href="https://doi.org/10.3938/jkps.57.924">https://doi.org/10.3938/jkps.57.924</a>.'
  ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “Hydrothermal
    (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics,” <i>Journal of Korean Physical
    Society</i>, vol. 57, no. 4, pp. 924–928, 2010.
  mla: Maeda, Takafumi, et al. “Hydrothermal (K1-XNax)NbO3 Lead-Free Piezoelectric
    Ceramics.” <i>Journal of Korean Physical Society</i>, vol. 57, no. 4, 2010, pp.
    924–28, doi:<a href="https://doi.org/10.3938/jkps.57.924">10.3938/jkps.57.924</a>.
  short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Journal of Korean
    Physical Society 57 (2010) 924–928.
date_created: 2019-05-13T10:19:43Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.3938/jkps.57.924
intvolume: '        57'
issue: '4'
keyword:
- Lead-free piezoelectric material
- KNN
- Hydrothermal method
language:
- iso: eng
page: 924-928
publication: Journal of Korean Physical Society
publication_identifier:
  issn:
  - 1948-5719
quality_controlled: '1'
status: public
title: Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics
type: journal_article
user_id: '55222'
volume: 57
year: '2010'
...
---
_id: '9759'
abstract:
- lang: eng
  text: Among various lead-free piezoelectric materials, (K,Na)NbO$_{3}$ is a very
    promising candidate. In this study, (K,Na)NbO$_{3}$ ceramics were sintered from
    mixed (K,Na)NbO$_{3}$ and NaNbO$_{3}$ powders prepared by hydrothermal reaction.
    These two powders were mixed with distilled water in a KNbO$_{3}$/NaNbO$_{3}$
    molar ratio of 1. After sintering the mixed powder, the solid solution of (Na,K)NbO$_{3}$
    ceramics was obtained. The electrical properties such as the electromechanical
    coupling factors k$_{p}$ and k$_{33}$, the mechanical quality factor, Q$_{m}$,
    and the piezoelectric constant d$_{33}$ of the sintered (K,Na)NbO$_{3}$ ceramics
    were 0.32, 0.48, 71 (radial mode), 118 ((33)mode), and 107 pC/N, respectively.
author:
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Norihito
  full_name: Takiguchi, Norihito
  last_name: Takiguchi
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
- first_name: Mutsuo
  full_name: Ishikawa, Mutsuo
  last_name: Ishikawa
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
citation:
  ama: Maeda T, Takiguchi N, Morita T, Ishikawa M, Hemsel T. (K,Na)NbO3 lead-free
    piezoelectric ceramics synthesized from hydrothermal powders. <i>Materials Letters</i>.
    2010;64(2):125-128. doi:<a href="https://doi.org/10.1016/j.matlet.2009.10.012">10.1016/j.matlet.2009.10.012</a>
  apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., &#38; Hemsel, T. (2010).
    (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders.
    <i>Materials Letters</i>, <i>64</i>(2), 125–128. <a href="https://doi.org/10.1016/j.matlet.2009.10.012">https://doi.org/10.1016/j.matlet.2009.10.012</a>
  bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={(K,Na)NbO3
    lead-free piezoelectric ceramics synthesized from hydrothermal powders}, volume={64},
    DOI={<a href="https://doi.org/10.1016/j.matlet.2009.10.012">10.1016/j.matlet.2009.10.012</a>},
    number={2}, journal={Materials Letters}, author={Maeda, Takafumi and Takiguchi,
    Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias}, year={2010},
    pages={125–128} }'
  chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa,
    and Tobias Hemsel. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized from
    Hydrothermal Powders.” <i>Materials Letters</i> 64, no. 2 (2010): 125–28. <a href="https://doi.org/10.1016/j.matlet.2009.10.012">https://doi.org/10.1016/j.matlet.2009.10.012</a>.'
  ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “(K,Na)NbO3
    lead-free piezoelectric ceramics synthesized from hydrothermal powders,” <i>Materials
    Letters</i>, vol. 64, no. 2, pp. 125–128, 2010.
  mla: Maeda, Takafumi, et al. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized
    from Hydrothermal Powders.” <i>Materials Letters</i>, vol. 64, no. 2, 2010, pp.
    125–28, doi:<a href="https://doi.org/10.1016/j.matlet.2009.10.012">10.1016/j.matlet.2009.10.012</a>.
  short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Materials Letters
    64 (2010) 125–128.
date_created: 2019-05-13T10:21:17Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1016/j.matlet.2009.10.012
intvolume: '        64'
issue: '2'
keyword:
- Lead-free piezoelectric material
- (K
- Na)NbO$_{3}$ ceramics
- Sintering solid solution
- Piezoelectric properties
language:
- iso: eng
page: 125-128
publication: Materials Letters
publication_identifier:
  issn:
  - 1948-5719
quality_controlled: '1'
status: public
title: (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders
type: journal_article
user_id: '55222'
volume: 64
year: '2010'
...