---
_id: '66762'
author:
- first_name: Rita
full_name: Morrien, Rita
id: '363'
last_name: Morrien
citation:
ama: 'Morrien R. “Future Fresko” - Charlotte Kraffts Münsterland-Blog MOMUMENT als
dystopische Heimatliteratur. In: Höppner S, Maxwill A, Literaturkommission Westfalen
des Landschaftsverbandes Westfalen-Lippe, eds. Literatur in Westfalen. Beiträge
zur Forschung 22. Vol 22. Literatur in Westfalen. Aisthesis Verlag; 2026:429-438.'
apa: Morrien, R. (2026). “Future Fresko” - Charlotte Kraffts Münsterland-Blog MOMUMENT
als dystopische Heimatliteratur. In S. Höppner, A. Maxwill, & Literaturkommission
Westfalen des Landschaftsverbandes Westfalen-Lippe (Eds.), Literatur in Westfalen.
Beiträge zur Forschung 22 (Vol. 22, pp. 429–438). Aisthesis Verlag.
bibtex: '@inbook{Morrien_2026, place={Bielefeld}, series={Literatur in Westfalen},
title={“Future Fresko” - Charlotte Kraffts Münsterland-Blog MOMUMENT als dystopische
Heimatliteratur}, volume={22}, booktitle={Literatur in Westfalen. Beiträge zur
Forschung 22}, publisher={Aisthesis Verlag}, author={Morrien, Rita}, editor={Höppner,
Stefan and Maxwill, Arnold and Literaturkommission Westfalen des Landschaftsverbandes
Westfalen-Lippe}, year={2026}, pages={429–438}, collection={Literatur in Westfalen}
}'
chicago: 'Morrien, Rita. “‘Future Fresko’ - Charlotte Kraffts Münsterland-Blog MOMUMENT
als dystopische Heimatliteratur.” In Literatur in Westfalen. Beiträge zur Forschung
22, edited by Stefan Höppner, Arnold Maxwill, and Literaturkommission Westfalen
des Landschaftsverbandes Westfalen-Lippe, 22:429–38. Literatur in Westfalen. Bielefeld:
Aisthesis Verlag, 2026.'
ieee: 'R. Morrien, “‘Future Fresko’ - Charlotte Kraffts Münsterland-Blog MOMUMENT
als dystopische Heimatliteratur,” in Literatur in Westfalen. Beiträge zur Forschung
22, vol. 22, S. Höppner, A. Maxwill, and Literaturkommission Westfalen des
Landschaftsverbandes Westfalen-Lippe, Eds. Bielefeld: Aisthesis Verlag, 2026,
pp. 429–438.'
mla: Morrien, Rita. “‘Future Fresko’ - Charlotte Kraffts Münsterland-Blog MOMUMENT
als dystopische Heimatliteratur.” Literatur in Westfalen. Beiträge zur Forschung
22, edited by Stefan Höppner et al., vol. 22, Aisthesis Verlag, 2026, pp.
429–38.
short: 'R. Morrien, in: S. Höppner, A. Maxwill, Literaturkommission Westfalen des
Landschaftsverbandes Westfalen-Lippe (Eds.), Literatur in Westfalen. Beiträge
zur Forschung 22, Aisthesis Verlag, Bielefeld, 2026, pp. 429–438.'
corporate_editor:
- Literaturkommission Westfalen des Landschaftsverbandes Westfalen-Lippe
date_created: 2026-08-20T11:48:37Z
date_updated: 2026-08-20T11:48:47Z
editor:
- first_name: Stefan
full_name: Höppner, Stefan
last_name: Höppner
- first_name: Arnold
full_name: Maxwill, Arnold
last_name: Maxwill
intvolume: ' 22'
language:
- iso: ger
page: 429-438
place: Bielefeld
publication: Literatur in Westfalen. Beiträge zur Forschung 22
publication_identifier:
isbn:
- 978-3-8498-2149-4
publication_status: published
publisher: Aisthesis Verlag
quality_controlled: '1'
series_title: Literatur in Westfalen
status: public
title: '"Future Fresko" - Charlotte Kraffts Münsterland-Blog MOMUMENT als dystopische
Heimatliteratur'
type: book_chapter
user_id: '363'
volume: 22
year: '2026'
...
---
_id: '66955'
author:
- first_name: Nicole
full_name: Lutters, Nicole
id: '22006'
last_name: Lutters
orcid: 0009-0006-7828-8448
- first_name: Julia
full_name: Riese, Julia
id: '101499'
last_name: Riese
orcid: 0000-0002-3053-0534
- first_name: Özgün Alkim
full_name: Boz, Özgün Alkim
id: '116497'
last_name: Boz
citation:
ama: 'Lutters N, Riese J, Boz ÖA. Electrification of Separation Column with 3D-Printed
Ceramic Packings. In: Book of Full Paper 13th International Conference on Distillation
& Absorption. ; 2026:709-714. doi:10.83455/2026DISTILLATIONADSORPTION'
apa: Lutters, N., Riese, J., & Boz, Ö. A. (2026). Electrification of Separation
Column with 3D-Printed Ceramic Packings. Book of Full Paper 13th International
Conference on Distillation & Absorption, 709–714. https://doi.org/10.83455/2026DISTILLATIONADSORPTION
bibtex: '@inproceedings{Lutters_Riese_Boz_2026, title={Electrification of Separation
Column with 3D-Printed Ceramic Packings}, DOI={10.83455/2026DISTILLATIONADSORPTION},
booktitle={Book of Full Paper 13th International Conference on Distillation &
Absorption}, author={Lutters, Nicole and Riese, Julia and Boz, Özgün Alkim}, year={2026},
pages={709–714} }'
chicago: Lutters, Nicole, Julia Riese, and Özgün Alkim Boz. “Electrification of
Separation Column with 3D-Printed Ceramic Packings.” In Book of Full Paper
13th International Conference on Distillation & Absorption, 709–14, 2026.
https://doi.org/10.83455/2026DISTILLATIONADSORPTION.
ieee: 'N. Lutters, J. Riese, and Ö. A. Boz, “Electrification of Separation Column
with 3D-Printed Ceramic Packings,” in Book of Full Paper 13th International
Conference on Distillation & Absorption, 2026, pp. 709–714, doi: 10.83455/2026DISTILLATIONADSORPTION.'
mla: Lutters, Nicole, et al. “Electrification of Separation Column with 3D-Printed
Ceramic Packings.” Book of Full Paper 13th International Conference on Distillation
& Absorption, 2026, pp. 709–14, doi:10.83455/2026DISTILLATIONADSORPTION.
short: 'N. Lutters, J. Riese, Ö.A. Boz, in: Book of Full Paper 13th International
Conference on Distillation & Absorption, 2026, pp. 709–714.'
date_created: 2026-09-04T07:36:15Z
date_updated: 2026-09-04T07:36:19Z
department:
- _id: '831'
doi: 10.83455/2026DISTILLATIONADSORPTION
language:
- iso: eng
page: 709-714
publication: Book of Full Paper 13th International Conference on Distillation & Absorption
quality_controlled: '1'
status: public
title: Electrification of Separation Column with 3D-Printed Ceramic Packings
type: conference
user_id: '101499'
year: '2026'
...
---
_id: '67019'
abstract:
- lang: eng
text: In order to make rail transportation more attractive compared to motorized
private transport, intelligent solutions are required across the entire mobility
chain. Train stations, as places of connection and transfer, offer the greatest
potential in this context. Thus, the deployment of autonomous service robots at
train stations offers a wide range of possibilities for supporting passengers
on their journeys by rail, for example, by providing information, accompanying
them to the next link in the mobility chain, or transporting their luggage. Since
such robots are battery-powered, one challenge is to carefully plan activities
based on the remaining battery capacity. Therefore, the aim of this work is to
predict battery usage and, in turn, battery state, in order to inform passengers,
and to enable intelligent planning of its usage.In this work, realistic operational
conditions of a service robot are systematically assessed through measurements
on the service robot itself and through passenger surveys at a train station.
The estimated operational conditions are experimentally replicated to simulate
the heterogeneous use of the battery pack, while acquiring condition monitoring
data throughout its use. The battery pack is modeled based on the single particle
model, which can robustly predict the battery state by simulating its usage considering
past operational conditions. The approach is validated using experimental data
obtained from simulating realistic usage. On the one hand, additional battery
packs are employed, and on the other hand, the load is varied. The advantage of
this approach lies in the ability to account for future changes, such as higher
loads than anticipated, to provide robust predictions.This enables the intelligent
use of service robots, offering passengers an improved service experience at train
stations.
author:
- first_name: Alexander
full_name: Löwen, Alexander
id: '47233'
last_name: Löwen
- first_name: Enrique
full_name: Aleman-Gallegos, Enrique
last_name: Aleman-Gallegos
- first_name: Osarenren
full_name: Aimiyekagbon, Osarenren
id: '9557'
last_name: Aimiyekagbon
- first_name: Sven
full_name: Wachsmuth, Sven
last_name: Wachsmuth
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Löwen A, Aleman-Gallegos E, Aimiyekagbon O, Wachsmuth S, Sextro W. Prediction
and simulation of battery pack usage for intelligent service robot deployment
at a train station. In: PHM Society European Conference. Vol 9. PHM Society;
2026:1-10. doi:10.36001/phme.2026.v9i1.4952'
apa: Löwen, A., Aleman-Gallegos, E., Aimiyekagbon, O., Wachsmuth, S., & Sextro,
W. (2026). Prediction and simulation of battery pack usage for intelligent service
robot deployment at a train station. PHM Society European Conference, 9(1),
1–10. https://doi.org/10.36001/phme.2026.v9i1.4952
bibtex: '@inproceedings{Löwen_Aleman-Gallegos_Aimiyekagbon_Wachsmuth_Sextro_2026,
place={Oslo}, title={Prediction and simulation of battery pack usage for intelligent
service robot deployment at a train station}, volume={9}, DOI={10.36001/phme.2026.v9i1.4952},
number={1}, booktitle={PHM Society European Conference}, publisher={PHM Society},
author={Löwen, Alexander and Aleman-Gallegos, Enrique and Aimiyekagbon, Osarenren
and Wachsmuth, Sven and Sextro, Walter}, year={2026}, pages={1–10} }'
chicago: 'Löwen, Alexander, Enrique Aleman-Gallegos, Osarenren Aimiyekagbon, Sven
Wachsmuth, and Walter Sextro. “Prediction and Simulation of Battery Pack Usage
for Intelligent Service Robot Deployment at a Train Station.” In PHM Society
European Conference, 9:1–10. Oslo: PHM Society, 2026. https://doi.org/10.36001/phme.2026.v9i1.4952.'
ieee: 'A. Löwen, E. Aleman-Gallegos, O. Aimiyekagbon, S. Wachsmuth, and W. Sextro,
“Prediction and simulation of battery pack usage for intelligent service robot
deployment at a train station,” in PHM Society European Conference, Oslo,
2026, vol. 9, no. 1, pp. 1–10, doi: 10.36001/phme.2026.v9i1.4952.'
mla: Löwen, Alexander, et al. “Prediction and Simulation of Battery Pack Usage for
Intelligent Service Robot Deployment at a Train Station.” PHM Society European
Conference, vol. 9, no. 1, PHM Society, 2026, pp. 1–10, doi:10.36001/phme.2026.v9i1.4952.
short: 'A. Löwen, E. Aleman-Gallegos, O. Aimiyekagbon, S. Wachsmuth, W. Sextro,
in: PHM Society European Conference, PHM Society, Oslo, 2026, pp. 1–10.'
conference:
end_date: 2026-07-10
location: Oslo
start_date: 2026-07-08
date_created: 2026-09-07T12:52:16Z
date_updated: 2026-09-07T13:01:58Z
department:
- _id: '151'
doi: 10.36001/phme.2026.v9i1.4952
intvolume: ' 9'
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://papers.phmsociety.org/index.php/phme/article/view/4952
oa: '1'
page: 1-10
place: Oslo
popular_science: '1'
publication: PHM Society European Conference
publication_identifier:
issn:
- 2325-016X
- 2325-016X
publication_status: published
publisher: PHM Society
quality_controlled: '1'
related_material:
link:
- relation: confirmation
url: https://papers.phmsociety.org/index.php/phme/article/view/4952
status: public
title: Prediction and simulation of battery pack usage for intelligent service robot
deployment at a train station
type: conference
user_id: '47233'
volume: 9
year: '2026'
...
---
_id: '58438'
abstract:
- lang: eng
text: This study presents a numerical approach using a 3D finite element model to
quantify the remaining clamp load of a plastic nut joint after a specific time.
The viscoelastic relaxation of a thermoplastic nut, which is predominantly screwed
on a welding stud, is described by a material card using Prony Series. Prony Series
are derived from experimental dynamical mechanical analysis with different moisture
and fiber contents of the thermoplastic. Since plastic nuts usually do not have
preformed threads, the increased temperatures and resulting stresses from the
thread-forming process are considered in the simulation. An FE model is created
and verified by substrate stress relaxation tests. Experimental clamp load measurements
with miniature compression load cells verify the clamp load prediction and show
a good agreement. The developed model is used to analyze the clamp load distribution
within the threads and reveals an almost even distribution within the threads.
author:
- first_name: Jan
full_name: Wippermann, Jan
last_name: Wippermann
- first_name: Gerson
full_name: Meschut, Gerson
last_name: Meschut
citation:
ama: Wippermann J, Meschut G. Numerical modeling of clamp load relaxation of plastic
nuts under varying moisture and fiber contents. Welding in the World. Published
online 2025. doi:10.1007/s40194-025-01928-4
apa: Wippermann, J., & Meschut, G. (2025). Numerical modeling of clamp load
relaxation of plastic nuts under varying moisture and fiber contents. Welding
in the World. https://doi.org/10.1007/s40194-025-01928-4
bibtex: '@article{Wippermann_Meschut_2025, title={Numerical modeling of clamp load
relaxation of plastic nuts under varying moisture and fiber contents}, DOI={10.1007/s40194-025-01928-4},
journal={Welding in the World}, publisher={Springer Science and Business Media
LLC}, author={Wippermann, Jan and Meschut, Gerson}, year={2025} }'
chicago: Wippermann, Jan, and Gerson Meschut. “Numerical Modeling of Clamp Load
Relaxation of Plastic Nuts under Varying Moisture and Fiber Contents.” Welding
in the World, 2025. https://doi.org/10.1007/s40194-025-01928-4.
ieee: 'J. Wippermann and G. Meschut, “Numerical modeling of clamp load relaxation
of plastic nuts under varying moisture and fiber contents,” Welding in the
World, 2025, doi: 10.1007/s40194-025-01928-4.'
mla: Wippermann, Jan, and Gerson Meschut. “Numerical Modeling of Clamp Load Relaxation
of Plastic Nuts under Varying Moisture and Fiber Contents.” Welding in the
World, Springer Science and Business Media LLC, 2025, doi:10.1007/s40194-025-01928-4.
short: J. Wippermann, G. Meschut, Welding in the World (2025).
date_created: 2025-01-30T14:26:50Z
date_updated: 2025-01-30T14:40:06Z
department:
- _id: '157'
doi: 10.1007/s40194-025-01928-4
language:
- iso: eng
publication: Welding in the World
publication_identifier:
issn:
- 0043-2288
- 1878-6669
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Numerical modeling of clamp load relaxation of plastic nuts under varying moisture
and fiber contents
type: journal_article
user_id: '55686'
year: '2025'
...
---
_id: '58492'
abstract:
- lang: eng
text: A coupled finite plasticity ductile damage and failure model is proposed for
the finite element simulation of clinch joining, which incorporates stress-state
dependency and regularisation by gradient-enhancement of the damage variable.
Ductile damage is determined based on a failure indicator governed by a failure
surface in stress space. The latter is exemplary chosen as a combination of the
Hosford–Coulomb and Cockcroft–Latham–Oh failure criteria for the high and low
stress triaxiality range, respectively, to cover the wide stress range encountered
in forming. Damage is coupled to elasto-plasticity to capture the damage-induced
degradation of the stiffness and flow stress. This affects the material behaviour
up to failure, thereby realistically altering the stress state. Consequently,
especially for highly ductile materials, where substantial necking and localisation
precede material fracture, the failure prediction is enhanced. The resulting stress
softening is regularised by gradient-enhancement to obtain mesh-objective results.
The analysis of a modified punch test experiment emphasises how the damage-induced
softening effect can strongly alter the actual stress state towards failure. Moreover,
the impact of successful regularisation is shown, and the applicability of the
damage and failure model to clinch joining is proven.
article_number: '106026'
article_type: original
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. Modelling of stress-state-dependent ductile
damage with gradient-enhancement exemplified for clinch joining. Journal of
the Mechanics and Physics of Solids. 2025;196. doi:10.1016/j.jmps.2025.106026
apa: Friedlein, J., Mergheim, J., & Steinmann, P. (2025). Modelling of stress-state-dependent
ductile damage with gradient-enhancement exemplified for clinch joining. Journal
of the Mechanics and Physics of Solids, 196, Article 106026. https://doi.org/10.1016/j.jmps.2025.106026
bibtex: '@article{Friedlein_Mergheim_Steinmann_2025, title={Modelling of stress-state-dependent
ductile damage with gradient-enhancement exemplified for clinch joining}, volume={196},
DOI={10.1016/j.jmps.2025.106026},
number={106026}, journal={Journal of the Mechanics and Physics of Solids}, publisher={Elsevier
BV}, author={Friedlein, Johannes and Mergheim, Julia and Steinmann, Paul}, year={2025}
}'
chicago: Friedlein, Johannes, Julia Mergheim, and Paul Steinmann. “Modelling of
Stress-State-Dependent Ductile Damage with Gradient-Enhancement Exemplified for
Clinch Joining.” Journal of the Mechanics and Physics of Solids 196 (2025).
https://doi.org/10.1016/j.jmps.2025.106026.
ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “Modelling of stress-state-dependent
ductile damage with gradient-enhancement exemplified for clinch joining,” Journal
of the Mechanics and Physics of Solids, vol. 196, Art. no. 106026, 2025, doi:
10.1016/j.jmps.2025.106026.'
mla: Friedlein, Johannes, et al. “Modelling of Stress-State-Dependent Ductile Damage
with Gradient-Enhancement Exemplified for Clinch Joining.” Journal of the Mechanics
and Physics of Solids, vol. 196, 106026, Elsevier BV, 2025, doi:10.1016/j.jmps.2025.106026.
short: J. Friedlein, J. Mergheim, P. Steinmann, Journal of the Mechanics and Physics
of Solids 196 (2025).
date_created: 2025-01-31T17:04:12Z
date_updated: 2025-01-31T17:06:22Z
doi: 10.1016/j.jmps.2025.106026
intvolume: ' 196'
keyword:
- Finite plasticity
- Ductile damage
- Gradient-enhancement
- Stress-state dependency
- Failure
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
publication: Journal of the Mechanics and Physics of Solids
publication_identifier:
issn:
- 0022-5096
publication_status: published
publisher: Elsevier BV
status: public
title: Modelling of stress-state-dependent ductile damage with gradient-enhancement
exemplified for clinch joining
type: journal_article
user_id: '84990'
volume: 196
year: '2025'
...
---
_id: '59599'
abstract:
- lang: eng
text: 'Background: Agility is crucial in game sports, requiring both motor and cognitive
skills. Athletes must perceive and process information to adapt movements, yet
traditional agility tests often lack cognitive and multidirectional demands. Additionally,
modern test systems are mostly stationary. This study evaluated the novel and
portable “Functional Agility Square Test” (FAST) for validity, reliability, and
usefulness. Methods: To assess discriminant validity, 22 game sports (GS) and
22 non-game sports (NGS) athletes participated in one session. Test–retest reliability
was examined with 36 GS athletes (20 female) across three sessions. Participants
performed cognitive (FAST_COG), preplanned (FAST_MOT), and randomized (FAST_SAT)
reactive change-of-direction tasks, each repeated three times per session. Results:
Results showed significantly lower response times (RTs) in GS compared to NGS
(p < 0.05). Mean RTs indicated moderate relative reliability (ICC 0.50–0.74),
while medians showed moderate to good reliability (ICC 0.59–0.83). Usefulness
was evident from the first session (FAST_MOT) or from the third session (FAST_SAT)
based on median RTs. Conclusions: Thus, the FAST seems to be valid, reliable,
and sensitive for GS-based agility assessment. Its portable setup enables ecologically
valid field testing. Future research should further increase task complexity to
better simulate game conditions.'
article_number: '126'
author:
- first_name: Romina Desiree
full_name: Müller, Romina Desiree
id: '62569'
last_name: Müller
- first_name: Daniel
full_name: Büchel, Daniel
id: '41088'
last_name: Büchel
- first_name: Jochen
full_name: Baumeister, Jochen
id: '46'
last_name: Baumeister
orcid: 0000-0003-2683-5826
citation:
ama: Müller RD, Büchel D, Baumeister J. Validation, Reliability, and Usefulness
of the Functional Agility Square Test [FAST]. Journal of Functional Morphology
and Kinesiology. 2025;10(2). doi:10.3390/jfmk10020126
apa: Müller, R. D., Büchel, D., & Baumeister, J. (2025). Validation, Reliability,
and Usefulness of the Functional Agility Square Test [FAST]. Journal of Functional
Morphology and Kinesiology, 10(2), Article 126. https://doi.org/10.3390/jfmk10020126
bibtex: '@article{Müller_Büchel_Baumeister_2025, title={Validation, Reliability,
and Usefulness of the Functional Agility Square Test [FAST]}, volume={10}, DOI={10.3390/jfmk10020126}, number={2126},
journal={Journal of Functional Morphology and Kinesiology}, publisher={MDPI AG},
author={Müller, Romina Desiree and Büchel, Daniel and Baumeister, Jochen}, year={2025}
}'
chicago: Müller, Romina Desiree, Daniel Büchel, and Jochen Baumeister. “Validation,
Reliability, and Usefulness of the Functional Agility Square Test [FAST].” Journal
of Functional Morphology and Kinesiology 10, no. 2 (2025). https://doi.org/10.3390/jfmk10020126.
ieee: 'R. D. Müller, D. Büchel, and J. Baumeister, “Validation, Reliability, and
Usefulness of the Functional Agility Square Test [FAST],” Journal of Functional
Morphology and Kinesiology, vol. 10, no. 2, Art. no. 126, 2025, doi: 10.3390/jfmk10020126.'
mla: Müller, Romina Desiree, et al. “Validation, Reliability, and Usefulness of
the Functional Agility Square Test [FAST].” Journal of Functional Morphology
and Kinesiology, vol. 10, no. 2, 126, MDPI AG, 2025, doi:10.3390/jfmk10020126.
short: R.D. Müller, D. Büchel, J. Baumeister, Journal of Functional Morphology and
Kinesiology 10 (2025).
date_created: 2025-04-16T09:15:59Z
date_updated: 2025-04-16T09:19:31Z
doi: 10.3390/jfmk10020126
intvolume: ' 10'
issue: '2'
language:
- iso: eng
publication: Journal of Functional Morphology and Kinesiology
publication_identifier:
issn:
- 2411-5142
publication_status: published
publisher: MDPI AG
status: public
title: Validation, Reliability, and Usefulness of the Functional Agility Square Test
[FAST]
type: journal_article
user_id: '62569'
volume: 10
year: '2025'
...
---
_id: '59805'
abstract:
- lang: eng
text: The LLC converter achieves the highest efficiency in resonant operation. Conventionally,
the input DC-link voltage is controlled to operate the LLC converter at resonance
for the given operating point. However, the DC-link capacitor voltage shows a
low-frequency voltage ripple (typically the second harmonic of grid frequency)
in cascaded converters so that the LLC has to adapt its switching frequency within
the grid period. Conventionally, the LLC converter operates 50% of the time above
the resonant frequency of 40 kHz and 50% below resonance. Both operating conditions
cause additional losses. However, experimental measurements indicate that the
below-resonance operation causes significantly higher losses than above-resonance
operation due to much higher primary and secondary transformer currents. It is
better to increase the DC-link voltage by 30% of the peak-to-peak low-frequency
voltage ripple to mostly avoid below-resonance operation (i.e., from 650 V to
680 V in this case). With the proposed control, the LLC converter operates about
75% of time over resonance and only 25% of time below resonance. The overall efficiency
increases from 97.66% to 97.7% for the average operating point with an 80% load
current. This corresponds to a 2% total loss reduction. Finally, the peak resonance
capacitor voltage decreases from 910 V to 790 V (−13%).
article_number: '1517'
author:
- first_name: Roland
full_name: Unruh, Roland
id: '34289'
last_name: Unruh
- first_name: Joachim
full_name: Böcker, Joachim
id: '66'
last_name: Böcker
orcid: 0000-0002-8480-7295
- first_name: Frank
full_name: Schafmeister, Frank
id: '71291'
last_name: Schafmeister
citation:
ama: Unruh R, Böcker J, Schafmeister F. Adaptive DC-Link Voltage Control for 22
kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple. Electronics.
2025;14(8). doi:10.3390/electronics14081517
apa: Unruh, R., Böcker, J., & Schafmeister, F. (2025). Adaptive DC-Link Voltage
Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage
Ripple. Electronics, 14(8), Article 1517. https://doi.org/10.3390/electronics14081517
bibtex: '@article{Unruh_Böcker_Schafmeister_2025, title={Adaptive DC-Link Voltage
Control for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage
Ripple}, volume={14}, DOI={10.3390/electronics14081517},
number={81517}, journal={Electronics}, publisher={MDPI AG}, author={Unruh, Roland
and Böcker, Joachim and Schafmeister, Frank}, year={2025} }'
chicago: Unruh, Roland, Joachim Böcker, and Frank Schafmeister. “Adaptive DC-Link
Voltage Control for 22 KW, 40 KHz LLC Resonant Converter Considering Low-Frequency
Voltage Ripple.” Electronics 14, no. 8 (2025). https://doi.org/10.3390/electronics14081517.
ieee: 'R. Unruh, J. Böcker, and F. Schafmeister, “Adaptive DC-Link Voltage Control
for 22 kW, 40 kHz LLC Resonant Converter Considering Low-Frequency Voltage Ripple,”
Electronics, vol. 14, no. 8, Art. no. 1517, 2025, doi: 10.3390/electronics14081517.'
mla: Unruh, Roland, et al. “Adaptive DC-Link Voltage Control for 22 KW, 40 KHz LLC
Resonant Converter Considering Low-Frequency Voltage Ripple.” Electronics,
vol. 14, no. 8, 1517, MDPI AG, 2025, doi:10.3390/electronics14081517.
short: R. Unruh, J. Böcker, F. Schafmeister, Electronics 14 (2025).
date_created: 2025-05-05T12:27:39Z
date_updated: 2025-05-05T12:34:00Z
department:
- _id: '52'
doi: 10.3390/electronics14081517
intvolume: ' 14'
issue: '8'
keyword:
- adaptive DC-link voltage
- cascaded H-bridge
- resonant operation
- Full-Bridge Converter
- loss minimization
- LLC Resonant Converter
- peak capacitor voltage reduction
language:
- iso: eng
main_file_link:
- url: https://www.mdpi.com/2079-9292/14/8/1517
publication: Electronics
publication_identifier:
issn:
- 2079-9292
publication_status: published
publisher: MDPI AG
status: public
title: Adaptive DC-Link Voltage Control for 22 kW, 40 kHz LLC Resonant Converter Considering
Low-Frequency Voltage Ripple
type: journal_article
user_id: '34289'
volume: 14
year: '2025'
...
---
_id: '59876'
abstract:
- lang: eng
text: 'Abstract. Clinching is a conventional mechanical joining process
used in Multi-Material Design in the automotive sector. To receive the desired
geometrical characteristics in clinch joints, correct process design is required.
To reduce the cost of finding fitting process parameters, numerical simulation
of the joining process can be used to predict the geometrical characteristics,
such as interlock, instead of an experimental approach. These numerical simulation
models consume computational resources and time. In this paper machine learning
is used to find correlations between features of the joining process and geometrical
characteristics in the joint. This serves the purpose of predicting the joint’s
target values more resource-efficiently. Modelling with machine learning requires
a structured dataset with sufficient parameter variation. To create this data
base the following procedure was used. For joining partners, a HC340LA steel alloy
with 2 mm material thickness was used punch-sided and an EN AW 5182 aluminum alloy
with 1.5 mm thickness was used die-sided. For this combination a suitable tool
combination and punch distance was experimentally identified. A finite element
model was created to reproduce the joining process. For the modelling of the material
of both joining partners flow curves determined by Vallaster et al. were used
[1]. The punch and die were recreated digitally by opto-electronic measurements
and transformed into a mesh suitable for numerical simulation. The model was validated
by comparing process values like the maximum force applied by the punch and geometrical
values in the joints cross section. Additionally, a process window for suitable
punch distances was experimentally determined. Afterwards a variation of 70 different
process designs was conducted with variants inside and outside the process window.
The results were used for training, testing and validating various machine learning
models. All models competed against each other to find the must suited model to
predict every geometric value. To ensure good model performances and prevent the
model from overfitting, a tenfold cross validation was used for validating the
models. Analysis of the results gives the following key findings: i) Good predictability
is reached for the interlock and sheet thickness of the joint. ii) Prediction
neck thickness showed low error values, but also low correlation. iii)The prediction
of those key values for evaluating clinch joint characteristics by machine learning
models positively impacts needed resources in comparison to numerical models.'
author:
- first_name: Jean-Patrick
full_name: Ludwig, Jean-Patrick
id: '76631'
last_name: Ludwig
- first_name: 'Seraphin '
full_name: 'Tsi-Nda Lontsi, Seraphin '
last_name: Tsi-Nda Lontsi
- first_name: Jonas
full_name: Neumann, Jonas
last_name: Neumann
- first_name: Lukas
full_name: Kappis, Lukas
last_name: Kappis
- first_name: 'Christian '
full_name: 'Scharr, Christian '
last_name: Scharr
- first_name: Wilko
full_name: Flügge, Wilko
last_name: Flügge
- 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: 'Ludwig J-P, Tsi-Nda Lontsi S, Neumann J, et al. Data driven prognosis of clinch
joints in multi-material design. In: Materials Research Proceedings. Vol
54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-157'
apa: Ludwig, J.-P., Tsi-Nda Lontsi, S., Neumann, J., Kappis, L., Scharr, C., Flügge,
W., Merklein, M., & Meschut, G. (2025). Data driven prognosis of clinch joints
in multi-material design. Materials Research Proceedings, 54. https://doi.org/10.21741/9781644903599-157
bibtex: '@inproceedings{Ludwig_Tsi-Nda Lontsi_Neumann_Kappis_Scharr_Flügge_Merklein_Meschut_2025,
place={Paestum}, title={Data driven prognosis of clinch joints in multi-material
design}, volume={54}, DOI={10.21741/9781644903599-157},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Ludwig, Jean-Patrick and Tsi-Nda Lontsi, Seraphin and Neumann,
Jonas and Kappis, Lukas and Scharr, Christian and Flügge, Wilko and Merklein,
Marion and Meschut, Gerson}, year={2025} }'
chicago: 'Ludwig, Jean-Patrick, Seraphin Tsi-Nda Lontsi, Jonas Neumann, Lukas Kappis,
Christian Scharr, Wilko Flügge, Marion Merklein, and Gerson Meschut. “Data Driven
Prognosis of Clinch Joints in Multi-Material Design.” In Materials Research
Proceedings, Vol. 54. Paestum: Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903599-157.'
ieee: 'J.-P. Ludwig et al., “Data driven prognosis of clinch joints in multi-material
design,” in Materials Research Proceedings, 2025, vol. 54, doi: 10.21741/9781644903599-157.'
mla: Ludwig, Jean-Patrick, et al. “Data Driven Prognosis of Clinch Joints in Multi-Material
Design.” Materials Research Proceedings, vol. 54, Materials Research Forum
LLC, 2025, doi:10.21741/9781644903599-157.
short: 'J.-P. Ludwig, S. Tsi-Nda Lontsi, J. Neumann, L. Kappis, C. Scharr, W. Flügge,
M. Merklein, G. Meschut, in: Materials Research Proceedings, Materials Research
Forum LLC, Paestum, 2025.'
date_created: 2025-05-13T06:51:37Z
date_updated: 2025-05-13T07:20:19Z
department:
- _id: '157'
doi: 10.21741/9781644903599-157
intvolume: ' 54'
language:
- iso: eng
place: Paestum
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
status: public
title: Data driven prognosis of clinch joints in multi-material design
type: conference
user_id: '76631'
volume: 54
year: '2025'
...
---
_id: '58531'
abstract:
- lang: eng
text: "Zusammenfassung\r\n Die fortschreitende
Digitalisierung stellt Schulen vor Herausforderungen, insbesondere bei der Nutzung
digitaler Medien in unterrichtlichen Lehr- und Lernprozessen mit dem Ziel, den
(über-) fachlichen Kompetenzerwerb aller Schüler*innen zu unterstützen. Betrachtet
man die digitalen Kompetenzen, zeigt sich, dass auch diese sozialen Disparitäten
unterliegen. Dennoch lassen sich in ICILS organisational resiliente Schulen identifizieren,
deren Schüler*innen trotz herausfordernder Schüler*innenkomposition überdurchschnittliche
digitale Kompetenzen erreichen. Studien, die fachspezifische Kompetenzen untersuchen,
lassen erkennen, dass organisational resiliente Schulen gemeinsame Merkmale aufweisen.
Ein Merkmal, das in diesem Zusammenhang bedeutsam erscheint, ist die Gestaltung
von Unterrichtsqualitätsmerkmalen. Digitale Kompetenzen erscheinen diesbezüglich
unerforscht, sodass der vorliegende Beitrag mittels Daten aus der BMBF-geförderten
qualitativen ICILS-Vertiefungsstudie UneS-ICILS 2018 (Unerwartbar erfolgreiche
Schulen im digitalen Wandel) Basisdimensionen von Unterrichtsqualität an resilienten
Schulen in Bezug auf digitale Kompetenzen untersucht. Für die Analyse wurden 22 leitfadengestützte
Interviews mit Lehrkräften und sieben Gruppeninterviews mit Schüler*innen im Hinblick
auf eine ‚effiziente Klassenführung‘, ‚kognitive Aktivierung‘ und ‚konstruktive
Unterstützung‘ inhaltsanalytisch ausgewertet. Im Ergebnis zeigt die Analyse der
Dimension ‚effiziente Klassenführung‘, dass sich u. a. die Organisation und Struktur
mittels digitaler Medien wie beispielsweise durch den Einsatz digitaler Lernplattformen
als bedeutende Faktoren herausstellen. Hinsichtlich der ‚kognitiven Aktivierung‘
wird der Einsatz digitaler Tools für das Anknüpfen an individuelles Vorwissen
als bedeutend hervorgehoben. Darüber hinaus zeigt sich bei der Dimension ‚konstruktive
Unterstützung‘ die Förderung des selbstgesteuerten Lernens und das Ausbilden von
Unterstützungsstrukturen zum (kooperativen) Lernen mit digitalen Medien als bedeutsam.
Induktiv ergänzt wurde die Dimension ‚Inhaltswahl und selektive Fokussierung‘,
die die hohe Relevanz des Erwerbs digitaler Kompetenzen im Unterricht an den resilienten
Schulen verdeutlicht."
author:
- first_name: Kerstin
full_name: Drossel, Kerstin
id: '48921'
last_name: Drossel
- first_name: Jan
full_name: Niemann, Jan
id: '32467'
last_name: Niemann
- first_name: Anna
full_name: Oldak, Anna
id: '98273'
last_name: Oldak
- first_name: Birgit
full_name: Eickelmann, Birgit
id: '40387'
last_name: Eickelmann
orcid: 0000-0001-6124-746X
citation:
ama: Drossel K, Niemann J, Oldak A, Eickelmann B. Basisdimensionen der Unterrichtsqualität
im Kontext des Erwerbs digitaler Kompetenzen an resilienten Schulen. Zeitschrift
für Bildungsforschung. Published online 2025. doi:10.1007/s35834-024-00468-z
apa: Drossel, K., Niemann, J., Oldak, A., & Eickelmann, B. (2025). Basisdimensionen
der Unterrichtsqualität im Kontext des Erwerbs digitaler Kompetenzen an resilienten
Schulen. Zeitschrift für Bildungsforschung. https://doi.org/10.1007/s35834-024-00468-z
bibtex: '@article{Drossel_Niemann_Oldak_Eickelmann_2025, title={Basisdimensionen
der Unterrichtsqualität im Kontext des Erwerbs digitaler Kompetenzen an resilienten
Schulen}, DOI={10.1007/s35834-024-00468-z},
journal={Zeitschrift für Bildungsforschung}, publisher={Springer Science and Business
Media LLC}, author={Drossel, Kerstin and Niemann, Jan and Oldak, Anna and Eickelmann,
Birgit}, year={2025} }'
chicago: Drossel, Kerstin, Jan Niemann, Anna Oldak, and Birgit Eickelmann. “Basisdimensionen
der Unterrichtsqualität im Kontext des Erwerbs digitaler Kompetenzen an resilienten
Schulen.” Zeitschrift für Bildungsforschung, 2025. https://doi.org/10.1007/s35834-024-00468-z.
ieee: 'K. Drossel, J. Niemann, A. Oldak, and B. Eickelmann, “Basisdimensionen der
Unterrichtsqualität im Kontext des Erwerbs digitaler Kompetenzen an resilienten
Schulen,” Zeitschrift für Bildungsforschung, 2025, doi: 10.1007/s35834-024-00468-z.'
mla: Drossel, Kerstin, et al. “Basisdimensionen der Unterrichtsqualität im Kontext
des Erwerbs digitaler Kompetenzen an resilienten Schulen.” Zeitschrift für
Bildungsforschung, Springer Science and Business Media LLC, 2025, doi:10.1007/s35834-024-00468-z.
short: K. Drossel, J. Niemann, A. Oldak, B. Eickelmann, Zeitschrift für Bildungsforschung
(2025).
date_created: 2025-02-07T06:53:08Z
date_updated: 2025-06-10T09:05:24Z
department:
- _id: '462'
doi: 10.1007/s35834-024-00468-z
language:
- iso: ger
publication: Zeitschrift für Bildungsforschung
publication_identifier:
issn:
- 2190-6890
- 2190-6904
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Basisdimensionen der Unterrichtsqualität im Kontext des Erwerbs digitaler Kompetenzen
an resilienten Schulen
type: journal_article
user_id: '40387'
year: '2025'
...
---
_id: '60179'
author:
- first_name: KS
full_name: Weber, KS
last_name: Weber
- first_name: S
full_name: Schlesinger, S
last_name: Schlesinger
- first_name: J
full_name: Goletzke, J
last_name: Goletzke
- first_name: K
full_name: Straßburger, K
last_name: Straßburger
- first_name: OP
full_name: Zaharia, OP
last_name: Zaharia
- first_name: S
full_name: Trenkamp, S
last_name: Trenkamp
- first_name: R
full_name: Wagner, R
last_name: Wagner
- first_name: W
full_name: Lieb, W
last_name: Lieb
- first_name: Anette
full_name: Buyken, Anette
id: '65985'
last_name: Buyken
- first_name: M
full_name: Roden, M
last_name: Roden
- first_name: C
full_name: Herder, C
last_name: Herder
- first_name: GDS
full_name: group, GDS
last_name: group
citation:
ama: Weber K, Schlesinger S, Goletzke J, et al. Associations of carbohydrate quality
and cardiovascular risk factors vary among diabetes subtypes. Cardiovasc Diabetol.
2025;24(1):53.
apa: Weber, K., Schlesinger, S., Goletzke, J., Straßburger, K., Zaharia, O., Trenkamp,
S., Wagner, R., Lieb, W., Buyken, A., Roden, M., Herder, C., & group, G. (2025).
Associations of carbohydrate quality and cardiovascular risk factors vary among
diabetes subtypes. Cardiovasc Diabetol, 24(1), 53.
bibtex: '@article{Weber_Schlesinger_Goletzke_Straßburger_Zaharia_Trenkamp_Wagner_Lieb_Buyken_Roden_et
al._2025, title={Associations of carbohydrate quality and cardiovascular risk
factors vary among diabetes subtypes.}, volume={24}, number={1}, journal={Cardiovasc
Diabetol}, author={Weber, KS and Schlesinger, S and Goletzke, J and Straßburger,
K and Zaharia, OP and Trenkamp, S and Wagner, R and Lieb, W and Buyken, Anette
and Roden, M and et al.}, year={2025}, pages={53} }'
chicago: 'Weber, KS, S Schlesinger, J Goletzke, K Straßburger, OP Zaharia, S Trenkamp,
R Wagner, et al. “Associations of Carbohydrate Quality and Cardiovascular Risk
Factors Vary among Diabetes Subtypes.” Cardiovasc Diabetol 24, no. 1 (2025):
53.'
ieee: K. Weber et al., “Associations of carbohydrate quality and cardiovascular
risk factors vary among diabetes subtypes.,” Cardiovasc Diabetol, vol.
24, no. 1, p. 53, 2025.
mla: Weber, KS, et al. “Associations of Carbohydrate Quality and Cardiovascular
Risk Factors Vary among Diabetes Subtypes.” Cardiovasc Diabetol, vol. 24,
no. 1, 2025, p. 53.
short: K. Weber, S. Schlesinger, J. Goletzke, K. Straßburger, O. Zaharia, S. Trenkamp,
R. Wagner, W. Lieb, A. Buyken, M. Roden, C. Herder, G. group, Cardiovasc Diabetol
24 (2025) 53.
date_created: 2025-06-11T08:45:21Z
date_updated: 2025-06-11T08:46:27Z
department:
- _id: '22'
external_id:
pmid:
- '39915806'
intvolume: ' 24'
issue: '1'
language:
- iso: eng
page: '53'
pmid: '1'
publication: Cardiovasc Diabetol
publication_identifier:
issn:
- 1475-2840
status: public
title: Associations of carbohydrate quality and cardiovascular risk factors vary among
diabetes subtypes.
type: journal_article
user_id: '92491'
volume: 24
year: '2025'
...
---
_id: '60180'
author:
- first_name: RM
full_name: Kranz, RM
last_name: Kranz
- first_name: C
full_name: Kettler, C
last_name: Kettler
- first_name: C
full_name: Anand, C
last_name: Anand
- first_name: C
full_name: Koeder, C
last_name: Koeder
- first_name: S
full_name: Husain, S
last_name: Husain
- first_name: N
full_name: Schoch, N
last_name: Schoch
- first_name: Anette
full_name: Buyken, Anette
id: '65985'
last_name: Buyken
- first_name: H
full_name: Englert, H
last_name: Englert
citation:
ama: 'Kranz R, Kettler C, Anand C, et al. Effect of a controlled lifestyle intervention
on medication use and costs: The Healthy Lifestyle Community Program (cohort 2).
Nutr Health. 2025;31(1):175-186.'
apa: 'Kranz, R., Kettler, C., Anand, C., Koeder, C., Husain, S., Schoch, N., Buyken,
A., & Englert, H. (2025). Effect of a controlled lifestyle intervention on
medication use and costs: The Healthy Lifestyle Community Program (cohort 2).
Nutr Health, 31(1), 175–186.'
bibtex: '@article{Kranz_Kettler_Anand_Koeder_Husain_Schoch_Buyken_Englert_2025,
title={Effect of a controlled lifestyle intervention on medication use and costs:
The Healthy Lifestyle Community Program (cohort 2).}, volume={31}, number={1},
journal={Nutr Health}, author={Kranz, RM and Kettler, C and Anand, C and Koeder,
C and Husain, S and Schoch, N and Buyken, Anette and Englert, H}, year={2025},
pages={175–186} }'
chicago: 'Kranz, RM, C Kettler, C Anand, C Koeder, S Husain, N Schoch, Anette Buyken,
and H Englert. “Effect of a Controlled Lifestyle Intervention on Medication Use
and Costs: The Healthy Lifestyle Community Program (Cohort 2).” Nutr Health
31, no. 1 (2025): 175–86.'
ieee: 'R. Kranz et al., “Effect of a controlled lifestyle intervention on
medication use and costs: The Healthy Lifestyle Community Program (cohort 2).,”
Nutr Health, vol. 31, no. 1, pp. 175–186, 2025.'
mla: 'Kranz, RM, et al. “Effect of a Controlled Lifestyle Intervention on Medication
Use and Costs: The Healthy Lifestyle Community Program (Cohort 2).” Nutr Health,
vol. 31, no. 1, 2025, pp. 175–86.'
short: R. Kranz, C. Kettler, C. Anand, C. Koeder, S. Husain, N. Schoch, A. Buyken,
H. Englert, Nutr Health 31 (2025) 175–186.
date_created: 2025-06-11T08:46:42Z
date_updated: 2025-06-11T08:47:39Z
department:
- _id: '22'
external_id:
pmid:
- '36938591'
intvolume: ' 31'
issue: '1'
language:
- iso: eng
page: 175-186
pmid: '1'
publication: Nutr Health
publication_identifier:
issn:
- 0260-1060
status: public
title: 'Effect of a controlled lifestyle intervention on medication use and costs:
The Healthy Lifestyle Community Program (cohort 2).'
type: journal_article
user_id: '92491'
volume: 31
year: '2025'
...
---
_id: '63856'
abstract:
- lang: eng
text: Electron energy-loss spectroscopy (EELS) is an advanced analytical technique
in transmission electron microscopy, as it provides insights into material characteristics,
such as electronic properties or elemental composition, at the atomic scale. The
precision of every EELS analysis, however, is inherently limited by noises and
blur. This thesis offers a comprehensive understanding of the noise, which is
particularly valuable at low dwell times necessary for beam sensitive materials
and for electron-matter interactions with low frequency of occurrence, where the
noise dominates the measurement. Additionally, correlations encountered in the
noise of an EELS measurement are described from both a theoretical and experimental
perspective. These correlations are caused by a convolution of the noisy signal
with the detector point spread function. Methods for characterizing key noise
parameters of typical detectors are described, allowing the noise model to be
tailored to any EELS detector. Ultimately, a novel deconvolution method enabling
significant sharpening and denoising of EELS measurements is introduced and demonstrated.
Its efficiency is further validated on both simulation and experimental data.
The described advancement offered by the proposed deconvolution method enables
the extension of current electron microscope capabilities, facilitating analysis
that would be unfeasible with existing deconvolution techniques.
author:
- first_name: Christian
full_name: Zietlow, Christian
id: '77368'
last_name: Zietlow
orcid: https://orcid.org/0000-0001-9696-619X
citation:
ama: Zietlow C. A Novel Lagrangian-Based Method for the Deconvolution of Electron
Energy-Loss Spectra. Universitätsbibliothek Paderborn; 2025. doi:10.17619/UNIPB/1-2438
apa: Zietlow, C. (2025). A novel Lagrangian-based method for the deconvolution
of electron energy-loss spectra. Universitätsbibliothek Paderborn. https://doi.org/10.17619/UNIPB/1-2438
bibtex: '@book{Zietlow_2025, title={A novel Lagrangian-based method for the deconvolution
of electron energy-loss spectra}, DOI={10.17619/UNIPB/1-2438},
publisher={Universitätsbibliothek Paderborn}, author={Zietlow, Christian}, year={2025}
}'
chicago: Zietlow, Christian. A Novel Lagrangian-Based Method for the Deconvolution
of Electron Energy-Loss Spectra. Universitätsbibliothek Paderborn, 2025. https://doi.org/10.17619/UNIPB/1-2438.
ieee: C. Zietlow, A novel Lagrangian-based method for the deconvolution of electron
energy-loss spectra. Universitätsbibliothek Paderborn, 2025.
mla: Zietlow, Christian. A Novel Lagrangian-Based Method for the Deconvolution
of Electron Energy-Loss Spectra. Universitätsbibliothek Paderborn, 2025, doi:10.17619/UNIPB/1-2438.
short: C. Zietlow, A Novel Lagrangian-Based Method for the Deconvolution of Electron
Energy-Loss Spectra, Universitätsbibliothek Paderborn, 2025.
date_created: 2026-02-04T06:57:14Z
date_updated: 2026-02-04T12:28:17Z
department:
- _id: '15'
doi: 10.17619/UNIPB/1-2438
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication_status: published
publisher: Universitätsbibliothek Paderborn
related_material:
link:
- relation: software
url: https://doi.org/10.17619/UNIPB/1-2438
status: public
supervisor:
- first_name: Jörg K. N.
full_name: Lindner, Jörg K. N.
id: '20797'
last_name: Lindner
title: A novel Lagrangian-based method for the deconvolution of electron energy-loss
spectra
type: dissertation
user_id: '77368'
year: '2025'
...
---
_id: '63882'
article_number: '120867'
author:
- first_name: Lars
full_name: Dinkelbach, Lars
last_name: Dinkelbach
- first_name: Stefan A.
full_name: Wudy, Stefan A.
last_name: Wudy
- first_name: Michaela F.
full_name: Hartmann, Michaela F.
last_name: Hartmann
- first_name: Lars
full_name: Libuda, Lars
last_name: Libuda
- first_name: Manuel
full_name: Föcker, Manuel
last_name: Föcker
- first_name: Johannes
full_name: Hebebrand, Johannes
last_name: Hebebrand
- first_name: Anke
full_name: Hinney, Anke
last_name: Hinney
- first_name: Ute
full_name: Nöthlings, Ute
last_name: Nöthlings
- first_name: Ute
full_name: Alexy, Ute
last_name: Alexy
- first_name: Corinna
full_name: Grasemann, Corinna
last_name: Grasemann
- first_name: Raphael
full_name: Hirtz, Raphael
last_name: Hirtz
citation:
ama: Dinkelbach L, Wudy SA, Hartmann MF, et al. Urinary steroid metabolome shows
adrenal, gonadal, and neuroactive steroid dysregulation in adolescents with depressive
symptoms. Journal of Affective Disorders. 2025;399. doi:10.1016/j.jad.2025.120867
apa: Dinkelbach, L., Wudy, S. A., Hartmann, M. F., Libuda, L., Föcker, M., Hebebrand,
J., Hinney, A., Nöthlings, U., Alexy, U., Grasemann, C., & Hirtz, R. (2025).
Urinary steroid metabolome shows adrenal, gonadal, and neuroactive steroid dysregulation
in adolescents with depressive symptoms. Journal of Affective Disorders,
399, Article 120867. https://doi.org/10.1016/j.jad.2025.120867
bibtex: '@article{Dinkelbach_Wudy_Hartmann_Libuda_Föcker_Hebebrand_Hinney_Nöthlings_Alexy_Grasemann_et
al._2025, title={Urinary steroid metabolome shows adrenal, gonadal, and neuroactive
steroid dysregulation in adolescents with depressive symptoms}, volume={399},
DOI={10.1016/j.jad.2025.120867},
number={120867}, journal={Journal of Affective Disorders}, publisher={Elsevier
BV}, author={Dinkelbach, Lars and Wudy, Stefan A. and Hartmann, Michaela F. and
Libuda, Lars and Föcker, Manuel and Hebebrand, Johannes and Hinney, Anke and Nöthlings,
Ute and Alexy, Ute and Grasemann, Corinna and et al.}, year={2025} }'
chicago: Dinkelbach, Lars, Stefan A. Wudy, Michaela F. Hartmann, Lars Libuda, Manuel
Föcker, Johannes Hebebrand, Anke Hinney, et al. “Urinary Steroid Metabolome Shows
Adrenal, Gonadal, and Neuroactive Steroid Dysregulation in Adolescents with Depressive
Symptoms.” Journal of Affective Disorders 399 (2025). https://doi.org/10.1016/j.jad.2025.120867.
ieee: 'L. Dinkelbach et al., “Urinary steroid metabolome shows adrenal, gonadal,
and neuroactive steroid dysregulation in adolescents with depressive symptoms,”
Journal of Affective Disorders, vol. 399, Art. no. 120867, 2025, doi: 10.1016/j.jad.2025.120867.'
mla: Dinkelbach, Lars, et al. “Urinary Steroid Metabolome Shows Adrenal, Gonadal,
and Neuroactive Steroid Dysregulation in Adolescents with Depressive Symptoms.”
Journal of Affective Disorders, vol. 399, 120867, Elsevier BV, 2025, doi:10.1016/j.jad.2025.120867.
short: L. Dinkelbach, S.A. Wudy, M.F. Hartmann, L. Libuda, M. Föcker, J. Hebebrand,
A. Hinney, U. Nöthlings, U. Alexy, C. Grasemann, R. Hirtz, Journal of Affective
Disorders 399 (2025).
date_created: 2026-02-05T09:22:45Z
date_updated: 2026-02-05T09:22:55Z
department:
- _id: '35'
- _id: '17'
- _id: '22'
doi: 10.1016/j.jad.2025.120867
intvolume: ' 399'
language:
- iso: eng
publication: Journal of Affective Disorders
publication_identifier:
issn:
- 0165-0327
publication_status: published
publisher: Elsevier BV
status: public
title: Urinary steroid metabolome shows adrenal, gonadal, and neuroactive steroid
dysregulation in adolescents with depressive symptoms
type: journal_article
user_id: '88682'
volume: 399
year: '2025'
...
---
_id: '64098'
author:
- first_name: Christian
full_name: Scheideler, Christian
id: '20792'
last_name: Scheideler
- first_name: Andreas
full_name: Padalkin, Andreas
id: '88238'
last_name: Padalkin
- first_name: Manish
full_name: Kumar, Manish
last_name: Kumar
citation:
ama: 'Scheideler C, Padalkin A, Kumar M. Reconfiguration and locomotion with joint
movements in the amoebot model. Auton. Robots 49(3): 22 (2025). Reconfiguration
and locomotion with joint movements in the amoebot model Auton Robots 49(3): 22
(2025). Published online 2025.'
apa: 'Scheideler, C., Padalkin, A., & Kumar, M. (2025). Reconfiguration and
locomotion with joint movements in the amoebot model. Auton. Robots 49(3): 22
(2025). Reconfiguration and Locomotion with Joint Movements in the Amoebot
Model. Auton. Robots 49(3): 22 (2025).'
bibtex: '@article{Scheideler_Padalkin_Kumar_2025, title={Reconfiguration and locomotion
with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025)}, journal={Reconfiguration
and locomotion with joint movements in the amoebot model. Auton. Robots 49(3):
22 (2025)}, author={Scheideler, Christian and Padalkin, Andreas and Kumar, Manish},
year={2025} }'
chicago: 'Scheideler, Christian, Andreas Padalkin, and Manish Kumar. “Reconfiguration
and Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3):
22 (2025).” Reconfiguration and Locomotion with Joint Movements in the Amoebot
Model. Auton. Robots 49(3): 22 (2025), 2025.'
ieee: 'C. Scheideler, A. Padalkin, and M. Kumar, “Reconfiguration and locomotion
with joint movements in the amoebot model. Auton. Robots 49(3): 22 (2025),” Reconfiguration
and locomotion with joint movements in the amoebot model. Auton. Robots 49(3):
22 (2025), 2025.'
mla: 'Scheideler, Christian, et al. “Reconfiguration and Locomotion with Joint Movements
in the Amoebot Model. Auton. Robots 49(3): 22 (2025).” Reconfiguration and
Locomotion with Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22
(2025), 2025.'
short: 'C. Scheideler, A. Padalkin, M. Kumar, Reconfiguration and Locomotion with
Joint Movements in the Amoebot Model. Auton. Robots 49(3): 22 (2025) (2025).'
date_created: 2026-02-10T09:41:12Z
date_updated: 2026-02-11T09:11:49Z
department:
- _id: '34'
- _id: '7'
- _id: '79'
language:
- iso: eng
publication: 'Reconfiguration and locomotion with joint movements in the amoebot model.
Auton. Robots 49(3): 22 (2025)'
status: public
title: 'Reconfiguration and locomotion with joint movements in the amoebot model.
Auton. Robots 49(3): 22 (2025)'
type: journal_article
user_id: '15578'
year: '2025'
...
---
_id: '64094'
author:
- first_name: Christian
full_name: Scheideler, Christian
id: '20792'
last_name: Scheideler
- first_name: Matthias
full_name: Artmann, Matthias
id: '63743'
last_name: Artmann
- first_name: 'Tobias '
full_name: 'Maurer, Tobias '
last_name: Maurer
- first_name: Andreas
full_name: Padalkin, Andreas
id: '88238'
last_name: Padalkin
- first_name: Daniel
full_name: Warner, Daniel
id: '3902'
last_name: Warner
citation:
ama: 'Scheideler C, Artmann M, Maurer T, Padalkin A, Warner D. AmoebotSim 2.0: A
Visual Simulation Environment for the Amoebot Model with Reconfigurable Circuits
and Joint Movements (Media Exposition). . In: ; 2025.'
apa: 'Scheideler, C., Artmann, M., Maurer, T., Padalkin, A., & Warner, D. (2025).
AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with
Reconfigurable Circuits and Joint Movements (Media Exposition). .'
bibtex: '@inproceedings{Scheideler_Artmann_Maurer_Padalkin_Warner_2025, place={SoCG
2025: 81:1-81:5}, title={AmoebotSim 2.0: A Visual Simulation Environment for the
Amoebot Model with Reconfigurable Circuits and Joint Movements (Media Exposition).
}, author={Scheideler, Christian and Artmann, Matthias and Maurer, Tobias and
Padalkin, Andreas and Warner, Daniel}, year={2025} }'
chicago: 'Scheideler, Christian, Matthias Artmann, Tobias Maurer, Andreas Padalkin,
and Daniel Warner. “AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot
Model with Reconfigurable Circuits and Joint Movements (Media Exposition). .”
SoCG 2025: 81:1-81:5, 2025.'
ieee: 'C. Scheideler, M. Artmann, T. Maurer, A. Padalkin, and D. Warner, “AmoebotSim
2.0: A Visual Simulation Environment for the Amoebot Model with Reconfigurable
Circuits and Joint Movements (Media Exposition). ,” 2025.'
mla: 'Scheideler, Christian, et al. AmoebotSim 2.0: A Visual Simulation Environment
for the Amoebot Model with Reconfigurable Circuits and Joint Movements (Media
Exposition). . 2025.'
short: 'C. Scheideler, M. Artmann, T. Maurer, A. Padalkin, D. Warner, in: SoCG 2025:
81:1-81:5, 2025.'
date_created: 2026-02-10T09:01:15Z
date_updated: 2026-02-11T09:11:42Z
department:
- _id: '34'
- _id: '7'
- _id: '79'
language:
- iso: eng
place: 'SoCG 2025: 81:1-81:5'
status: public
title: 'AmoebotSim 2.0: A Visual Simulation Environment for the Amoebot Model with
Reconfigurable Circuits and Joint Movements (Media Exposition). '
type: conference
user_id: '15578'
year: '2025'
...
---
_id: '62728'
author:
- first_name: Laura
full_name: Müller, Laura
id: '44605'
last_name: Müller
- first_name: Marc
full_name: Hinterthaner, Marc
last_name: Hinterthaner
- first_name: Eduard
full_name: Ortlieb, Eduard
last_name: Ortlieb
- first_name: Norman
full_name: Mohnfeld, Norman
last_name: Mohnfeld
- first_name: Andreas Maximilian
full_name: Schultz, Andreas Maximilian
id: '40599'
last_name: Schultz
- first_name: Johanna
full_name: Uhe, Johanna
last_name: Uhe
- first_name: Oliver
full_name: Koepler, Oliver
last_name: Koepler
- first_name: Iryna
full_name: Mozgova, Iryna
id: '95903'
last_name: Mozgova
citation:
ama: 'Müller L, Hinterthaner M, Ortlieb E, et al. Getting Things Done: How to Make
Simulation Data FAIR and Ready to Reuse. In: IFIP Advances in Information and
Communication Technology. Springer Nature Switzerland; 2025:140-150. doi:10.1007/978-3-032-09704-0_14'
apa: 'Müller, L., Hinterthaner, M., Ortlieb, E., Mohnfeld, N., Schultz, A. M., Uhe,
J., Koepler, O., & Mozgova, I. (2025). Getting Things Done: How to Make Simulation
Data FAIR and Ready to Reuse. IFIP Advances in Information and Communication
Technology, 140–150. https://doi.org/10.1007/978-3-032-09704-0_14'
bibtex: '@inproceedings{Müller_Hinterthaner_Ortlieb_Mohnfeld_Schultz_Uhe_Koepler_Mozgova_2025,
place={Cham}, title={Getting Things Done: How to Make Simulation Data FAIR and
Ready to Reuse}, DOI={10.1007/978-3-032-09704-0_14},
booktitle={IFIP Advances in Information and Communication Technology}, publisher={Springer
Nature Switzerland}, author={Müller, Laura and Hinterthaner, Marc and Ortlieb,
Eduard and Mohnfeld, Norman and Schultz, Andreas Maximilian and Uhe, Johanna and
Koepler, Oliver and Mozgova, Iryna}, year={2025}, pages={140–150} }'
chicago: 'Müller, Laura, Marc Hinterthaner, Eduard Ortlieb, Norman Mohnfeld, Andreas
Maximilian Schultz, Johanna Uhe, Oliver Koepler, and Iryna Mozgova. “Getting Things
Done: How to Make Simulation Data FAIR and Ready to Reuse.” In IFIP Advances
in Information and Communication Technology, 140–50. Cham: Springer Nature
Switzerland, 2025. https://doi.org/10.1007/978-3-032-09704-0_14.'
ieee: 'L. Müller et al., “Getting Things Done: How to Make Simulation Data
FAIR and Ready to Reuse,” in IFIP Advances in Information and Communication
Technology, 2025, pp. 140–150, doi: 10.1007/978-3-032-09704-0_14.'
mla: 'Müller, Laura, et al. “Getting Things Done: How to Make Simulation Data FAIR
and Ready to Reuse.” IFIP Advances in Information and Communication Technology,
Springer Nature Switzerland, 2025, pp. 140–50, doi:10.1007/978-3-032-09704-0_14.'
short: 'L. Müller, M. Hinterthaner, E. Ortlieb, N. Mohnfeld, A.M. Schultz, J. Uhe,
O. Koepler, I. Mozgova, in: IFIP Advances in Information and Communication Technology,
Springer Nature Switzerland, Cham, 2025, pp. 140–150.'
date_created: 2025-12-01T14:12:55Z
date_updated: 2026-02-20T13:01:07Z
department:
- _id: '741'
doi: 10.1007/978-3-032-09704-0_14
language:
- iso: eng
page: 140-150
place: Cham
publication: IFIP Advances in Information and Communication Technology
publication_identifier:
isbn:
- '9783032097033'
- '9783032097040'
issn:
- 1868-4238
- 1868-422X
publication_status: published
publisher: Springer Nature Switzerland
quality_controlled: '1'
status: public
title: 'Getting Things Done: How to Make Simulation Data FAIR and Ready to Reuse'
type: conference
user_id: '44605'
year: '2025'
...
---
_id: '58844'
author:
- first_name: Lars
full_name: Schmelzle, Lars
last_name: Schmelzle
- first_name: Felix
full_name: Beule, Felix
id: '66192'
last_name: Beule
- first_name: Gunnar
full_name: Possart, Gunnar
last_name: Possart
- first_name: Dominik
full_name: Teutenberg, Dominik
id: '537'
last_name: Teutenberg
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: 'Schmelzle L, Beule F, Possart G, Teutenberg D, Mergheim J, Meschut G. Methodenentwicklung
zur Simulation von hyperelastischen Klebverbindungen unter Crashbelastung. In:
DECHEMA, ed. 25. Kolloquium: Gemeinsame Forschung in Der Klebtechnik. ;
2025.'
apa: 'Schmelzle, L., Beule, F., Possart, G., Teutenberg, D., Mergheim, J., &
Meschut, G. (2025). Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen
unter Crashbelastung. In DECHEMA (Ed.), 25. Kolloquium: Gemeinsame Forschung
in der Klebtechnik.'
bibtex: '@inproceedings{Schmelzle_Beule_Possart_Teutenberg_Mergheim_Meschut_2025,
title={Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen
unter Crashbelastung}, booktitle={25. Kolloquium: Gemeinsame Forschung in der
Klebtechnik}, author={Schmelzle, Lars and Beule, Felix and Possart, Gunnar and
Teutenberg, Dominik and Mergheim, Julia and Meschut, Gerson}, editor={DECHEMA},
year={2025} }'
chicago: 'Schmelzle, Lars, Felix Beule, Gunnar Possart, Dominik Teutenberg, Julia
Mergheim, and Gerson Meschut. “Methodenentwicklung Zur Simulation von Hyperelastischen
Klebverbindungen Unter Crashbelastung.” In 25. Kolloquium: Gemeinsame Forschung
in Der Klebtechnik, edited by DECHEMA, 2025.'
ieee: 'L. Schmelzle, F. Beule, G. Possart, D. Teutenberg, J. Mergheim, and G. Meschut,
“Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter
Crashbelastung,” in 25. Kolloquium: Gemeinsame Forschung in der Klebtechnik,
Köln, 2025.'
mla: 'Schmelzle, Lars, et al. “Methodenentwicklung Zur Simulation von Hyperelastischen
Klebverbindungen Unter Crashbelastung.” 25. Kolloquium: Gemeinsame Forschung
in Der Klebtechnik, edited by DECHEMA, 2025.'
short: 'L. Schmelzle, F. Beule, G. Possart, D. Teutenberg, J. Mergheim, G. Meschut,
in: DECHEMA (Ed.), 25. Kolloquium: Gemeinsame Forschung in Der Klebtechnik, 2025.'
conference:
end_date: 2025-02-19
location: Köln
name: '25. Kolloquium: Gemeinsame Forschung in der Klebtechnik'
start_date: 2025-02-18
corporate_editor:
- DECHEMA
date_created: 2025-02-26T07:23:07Z
date_updated: 2026-02-23T11:44:37Z
department:
- _id: '157'
language:
- iso: eng
publication: '25. Kolloquium: Gemeinsame Forschung in der Klebtechnik'
status: public
title: Methodenentwicklung zur Simulation von hyperelastischen Klebverbindungen unter
Crashbelastung
type: conference
user_id: '537'
year: '2025'
...
---
_id: '59587'
abstract:
- lang: eng
text: Abstract. As a widely used sheet metal in clinched joints within the automotive
industry, the aluminum alloy EN AW-6014 has been the focus of numerous studies.
High-cycle fatigue (HCF) is a critical aspect when assessing the durability of
clinched joints. In the present work, the HCF behavior of EN AW-6014 T4 was explored
both experimentally and numerically. To model the fatigue behavior, Lemaitre’s
two-scale damage model was used. Two key parameters, damage strength and damage
exponent, are necessary for numerical investigations of HCF behavior. These parameters
were determined through experiments with flat specimens and subsequently validated
within a numerical model of clinched joints. The numerical results for fatigue
match the experimental ones of the clinched joints quite well.
author:
- first_name: Chin
full_name: Chen, Chin
last_name: Chen
- first_name: Malte Christian
full_name: Schlichter, Malte Christian
id: '61977'
last_name: Schlichter
- first_name: Sven
full_name: Harzheim, Sven
last_name: Harzheim
- first_name: Martin
full_name: Hofmann, Martin
last_name: Hofmann
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
- first_name: Thomas
full_name: Wallmersperger, Thomas
last_name: Wallmersperger
citation:
ama: 'Chen C, Schlichter MC, Harzheim S, et al. High-cycle fatigue testing and parameter
identification for numerical simulation of aluminum alloy EN AW-6014. In: Materials
Research Proceedings. Vol 52. Materials Research Forum LLC; 2025. doi:10.21741/9781644903551-23'
apa: Chen, C., Schlichter, M. C., Harzheim, S., Hofmann, M., Bobbert, M., Meschut,
G., & Wallmersperger, T. (2025). High-cycle fatigue testing and parameter
identification for numerical simulation of aluminum alloy EN AW-6014. Materials
Research Proceedings, 52. https://doi.org/10.21741/9781644903551-23
bibtex: '@inproceedings{Chen_Schlichter_Harzheim_Hofmann_Bobbert_Meschut_Wallmersperger_2025,
title={High-cycle fatigue testing and parameter identification for numerical simulation
of aluminum alloy EN AW-6014}, volume={52}, DOI={10.21741/9781644903551-23},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Chen, Chin and Schlichter, Malte Christian and Harzheim, Sven and
Hofmann, Martin and Bobbert, Mathias and Meschut, Gerson and Wallmersperger, Thomas},
year={2025} }'
chicago: Chen, Chin, Malte Christian Schlichter, Sven Harzheim, Martin Hofmann,
Mathias Bobbert, Gerson Meschut, and Thomas Wallmersperger. “High-Cycle Fatigue
Testing and Parameter Identification for Numerical Simulation of Aluminum Alloy
EN AW-6014.” In Materials Research Proceedings, Vol. 52. Materials Research
Forum LLC, 2025. https://doi.org/10.21741/9781644903551-23.
ieee: 'C. Chen et al., “High-cycle fatigue testing and parameter identification
for numerical simulation of aluminum alloy EN AW-6014,” in Materials Research
Proceedings, 2025, vol. 52, doi: 10.21741/9781644903551-23.'
mla: Chen, Chin, et al. “High-Cycle Fatigue Testing and Parameter Identification
for Numerical Simulation of Aluminum Alloy EN AW-6014.” Materials Research
Proceedings, vol. 52, Materials Research Forum LLC, 2025, doi:10.21741/9781644903551-23.
short: 'C. Chen, M.C. Schlichter, S. Harzheim, M. Hofmann, M. Bobbert, G. Meschut,
T. Wallmersperger, in: Materials Research Proceedings, Materials Research Forum
LLC, 2025.'
date_created: 2025-04-15T11:14:53Z
date_updated: 2026-02-24T13:43:56Z
department:
- _id: '157'
doi: 10.21741/9781644903551-23
intvolume: ' 52'
language:
- iso: eng
project:
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _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
quality_controlled: '1'
status: public
title: High-cycle fatigue testing and parameter identification for numerical simulation
of aluminum alloy EN AW-6014
type: conference
user_id: '7850'
volume: 52
year: '2025'
...
---
_id: '60440'
abstract:
- lang: eng
text: The versatile self-pierce riveting (V-SPR) is a further development of semi-tubular
self-pierce riveting. V-SPR enables adaptation to changing boundary conditions,
such as a change in the material thickness combination, without varying the rivet
die combination due to increased punch actuation and the use of multi-range capable
rivets [1]. The inner punch first sets the rivet. The outer punch then forms the
rivet head to the respective sheet thickness. For this, the rivet requires a hard
shank and a ductile rivet head, which is achieved by an inductive local hardening
process [2]. Until now, the joint formation of rivets with graded hardness profile
has been challenging to estimate in the FEM simulation due to the inhomogeneous
material conditions in the rivet. In this study, a method capable of reproducing
the experimentally determined hardness levels of rivets in detail is shown. This
FE model enables the realistic modelling of the mechanical properties of the rivet
on the basis of the hardness profile in order to predict the correct deformation
processes and stresses during the riveting process. First, the detailed experimental
hardness mapping of the locally heat-treated rivets is transferred into the FE
model. The FEM material model can predict the local strength of the rivet based
on hardness by scaling the flow curves. To estimate the predictive capability
of the FEM model, the joint formation of rivets with different graded hardness
profiles is compared experimentally and simulative. Based on the validated model,
the influence of different rivet hardness profiles on the joint formation is analysed
numerically. By adapting the material model, a high level of correlation between
the experiment's joint formation and the simulation can be achieved.
author:
- first_name: Pia Katharina
full_name: Holtkamp, Pia Katharina
id: '44935'
last_name: Holtkamp
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: 'Holtkamp PK, Bielak CR, Bobbert M, Meschut G. Simulation of the joining process
of graded hardened multi-range capable rivets. In: Materials Research Proceedings.
Vol 54. Materials Research Forum LLC; 2025. doi:10.21741/9781644903599-153'
apa: Holtkamp, P. K., Bielak, C. R., Bobbert, M., & Meschut, G. (2025). Simulation
of the joining process of graded hardened multi-range capable rivets. Materials
Research Proceedings, 54. https://doi.org/10.21741/9781644903599-153
bibtex: '@inproceedings{Holtkamp_Bielak_Bobbert_Meschut_2025, title={Simulation
of the joining process of graded hardened multi-range capable rivets}, volume={54},
DOI={10.21741/9781644903599-153},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Holtkamp, Pia Katharina and Bielak, Christian Roman and Bobbert,
Mathias and Meschut, Gerson}, year={2025} }'
chicago: Holtkamp, Pia Katharina, Christian Roman Bielak, Mathias Bobbert, and Gerson
Meschut. “Simulation of the Joining Process of Graded Hardened Multi-Range Capable
Rivets.” In Materials Research Proceedings, Vol. 54. Materials Research
Forum LLC, 2025. https://doi.org/10.21741/9781644903599-153.
ieee: 'P. K. Holtkamp, C. R. Bielak, M. Bobbert, and G. Meschut, “Simulation of
the joining process of graded hardened multi-range capable rivets,” in Materials
Research Proceedings, 2025, vol. 54, doi: 10.21741/9781644903599-153.'
mla: Holtkamp, Pia Katharina, et al. “Simulation of the Joining Process of Graded
Hardened Multi-Range Capable Rivets.” Materials Research Proceedings, vol.
54, Materials Research Forum LLC, 2025, doi:10.21741/9781644903599-153.
short: 'P.K. Holtkamp, C.R. Bielak, M. Bobbert, G. Meschut, in: Materials Research
Proceedings, Materials Research Forum LLC, 2025.'
date_created: 2025-06-27T08:23:00Z
date_updated: 2026-02-24T14:12:10Z
department:
- _id: '43'
- _id: '157'
doi: 10.21741/9781644903599-153
intvolume: ' 54'
language:
- iso: eng
project:
- _id: '130'
name: 'TRR 285: TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
- _id: '133'
name: 'TRR 285 - C: TRR 285 - Project Area C'
- _id: '146'
name: 'TRR 285 – C02: TRR 285 - Subproject C02'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Simulation of the joining process of graded hardened multi-range capable rivets
type: conference
user_id: '7850'
volume: 54
year: '2025'
...
---
_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. Sheet Metal 2025. Materials
Research Proceedings. Materials Research Forum LLC, Materials Research Foundations;
2025:268–275. doi:10.21741/9781644903551-33'
apa: Gröger, B., Gerritzen, J., Hornig, A., & 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, & F. Micari (Eds.), Sheet Metal 2025 (pp. 268–275). Materials
Research Forum LLC, Materials Research Foundations. https://doi.org/10.21741/9781644903551-33
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={10.21741/9781644903551-33},
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 Sheet Metal 2025, 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. https://doi.org/10.21741/9781644903551-33.
ieee: 'B. Gröger, J. Gerritzen, A. Hornig, and M. Gude, “Modeling approaches for
the decomposition behavior of preconsolidated rovings throughout local deformation
processes,” in Sheet Metal 2025, 2025, pp. 268–275, doi: 10.21741/9781644903551-33.'
mla: Gröger, Benjamin, et al. “Modeling Approaches for the Decomposition Behavior
of Preconsolidated Rovings throughout Local Deformation Processes.” Sheet Metal
2025, edited by G. Meschut et al., Materials Research Forum LLC, Materials
Research Foundations, 2025, pp. 268–275, doi:10.21741/9781644903551-33.
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'
...