---
_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: '64157'
article_number: '104471'
author:
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
citation:
ama: Friedlein J, Steinmann P, Mergheim J. One-way coupled staggered implementation
of gradient-enhanced damage models coupled to thermoplasticity. Finite Elements
in Analysis and Design. 2025;253. doi:10.1016/j.finel.2025.104471
apa: Friedlein, J., Steinmann, P., & Mergheim, J. (2025). One-way coupled staggered
implementation of gradient-enhanced damage models coupled to thermoplasticity.
Finite Elements in Analysis and Design, 253, Article 104471. https://doi.org/10.1016/j.finel.2025.104471
bibtex: '@article{Friedlein_Steinmann_Mergheim_2025, title={One-way coupled staggered
implementation of gradient-enhanced damage models coupled to thermoplasticity},
volume={253}, DOI={10.1016/j.finel.2025.104471},
number={104471}, journal={Finite Elements in Analysis and Design}, publisher={Elsevier
BV}, author={Friedlein, Johannes and Steinmann, Paul and Mergheim, Julia}, year={2025}
}'
chicago: Friedlein, Johannes, Paul Steinmann, and Julia Mergheim. “One-Way Coupled
Staggered Implementation of Gradient-Enhanced Damage Models Coupled to Thermoplasticity.”
Finite Elements in Analysis and Design 253 (2025). https://doi.org/10.1016/j.finel.2025.104471.
ieee: 'J. Friedlein, P. Steinmann, and J. Mergheim, “One-way coupled staggered implementation
of gradient-enhanced damage models coupled to thermoplasticity,” Finite Elements
in Analysis and Design, vol. 253, Art. no. 104471, 2025, doi: 10.1016/j.finel.2025.104471.'
mla: Friedlein, Johannes, et al. “One-Way Coupled Staggered Implementation of Gradient-Enhanced
Damage Models Coupled to Thermoplasticity.” Finite Elements in Analysis and
Design, vol. 253, 104471, Elsevier BV, 2025, doi:10.1016/j.finel.2025.104471.
short: J. Friedlein, P. Steinmann, J. Mergheim, Finite Elements in Analysis and
Design 253 (2025).
date_created: 2026-02-16T06:56:31Z
date_updated: 2026-02-16T06:59:05Z
doi: 10.1016/j.finel.2025.104471
intvolume: ' 253'
language:
- iso: eng
project:
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
- _id: '131'
name: TRR 285 - Project Area A
- _id: '139'
name: TRR 285 - Subproject A05
publication: Finite Elements in Analysis and Design
publication_identifier:
issn:
- 0168-874X
publication_status: published
publisher: Elsevier BV
status: public
title: One-way coupled staggered implementation of gradient-enhanced damage models
coupled to thermoplasticity
type: journal_article
user_id: '84990'
volume: 253
year: '2025'
...
---
_id: '59584'
article_number: '100299'
author:
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Stephan
full_name: Lüder, Stephan
last_name: Lüder
- first_name: Jan
full_name: Kalich, Jan
last_name: Kalich
- first_name: Hans Christian
full_name: Schmale, Hans Christian
last_name: Schmale
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Malte Christian
full_name: Schlichter, Malte Christian
id: '61977'
last_name: Schlichter
- 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: Paul
full_name: Steinmann, Paul
last_name: Steinmann
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
citation:
ama: Friedlein J, Lüder S, Kalich J, et al. Application of stress-state-dependent
ductile damage and failure model to clinch joining for a wide range of tool and
material combinations. Journal of Advanced Joining Processes. 2025;11.
doi:10.1016/j.jajp.2025.100299
apa: Friedlein, J., Lüder, S., Kalich, J., Schmale, H. C., Böhnke, M., Schlichter,
M. C., Bobbert, M., Meschut, G., Steinmann, P., & Mergheim, J. (2025). Application
of stress-state-dependent ductile damage and failure model to clinch joining for
a wide range of tool and material combinations. Journal of Advanced Joining
Processes, 11, Article 100299. https://doi.org/10.1016/j.jajp.2025.100299
bibtex: '@article{Friedlein_Lüder_Kalich_Schmale_Böhnke_Schlichter_Bobbert_Meschut_Steinmann_Mergheim_2025,
title={Application of stress-state-dependent ductile damage and failure model
to clinch joining for a wide range of tool and material combinations}, volume={11},
DOI={10.1016/j.jajp.2025.100299},
number={100299}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
BV}, author={Friedlein, Johannes and Lüder, Stephan and Kalich, Jan and Schmale,
Hans Christian and Böhnke, Max and Schlichter, Malte Christian and Bobbert, Mathias
and Meschut, Gerson and Steinmann, Paul and Mergheim, Julia}, year={2025} }'
chicago: Friedlein, Johannes, Stephan Lüder, Jan Kalich, Hans Christian Schmale,
Max Böhnke, Malte Christian Schlichter, Mathias Bobbert, Gerson Meschut, Paul
Steinmann, and Julia Mergheim. “Application of Stress-State-Dependent Ductile
Damage and Failure Model to Clinch Joining for a Wide Range of Tool and Material
Combinations.” Journal of Advanced Joining Processes 11 (2025). https://doi.org/10.1016/j.jajp.2025.100299.
ieee: 'J. Friedlein et al., “Application of stress-state-dependent ductile
damage and failure model to clinch joining for a wide range of tool and material
combinations,” Journal of Advanced Joining Processes, vol. 11, Art. no.
100299, 2025, doi: 10.1016/j.jajp.2025.100299.'
mla: Friedlein, Johannes, et al. “Application of Stress-State-Dependent Ductile
Damage and Failure Model to Clinch Joining for a Wide Range of Tool and Material
Combinations.” Journal of Advanced Joining Processes, vol. 11, 100299,
Elsevier BV, 2025, doi:10.1016/j.jajp.2025.100299.
short: J. Friedlein, S. Lüder, J. Kalich, H.C. Schmale, M. Böhnke, M.C. Schlichter,
M. Bobbert, G. Meschut, P. Steinmann, J. Mergheim, Journal of Advanced Joining
Processes 11 (2025).
date_created: 2025-04-15T11:00:56Z
date_updated: 2026-02-24T14:00:55Z
doi: 10.1016/j.jajp.2025.100299
intvolume: ' 11'
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: '138'
name: 'TRR 285 – A04: TRR 285 - Subproject A04'
- _id: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Application of stress-state-dependent ductile damage and failure model to clinch
joining for a wide range of tool and material combinations
type: journal_article
user_id: '7850'
volume: 11
year: '2025'
...
---
_id: '61174'
abstract:
- lang: eng
text: Abstract. Mechanical joining methods, such as clinching, are characterised
by locally large plastic deformations of the sheet metal to be joined. The majority
of the thereby inserted work is transformed into heat. The heat generation and
temperature evolution are systematically studied herein by means of thermomechanical
process simulations for joining the dual-phase steel HCT590X and the aluminium
alloy EN-AW 6014. The thermal-induced softening of the material is incorporated
by a suitable coupled thermoplastic constitutive model. It is observed how the
tools significantly and importantly contribute to the heat exchange. They reduce
peak temperature increases of 225 K (without heat transfer to tools) to less than
90 K for realistic behaviour of contact heat transfer. Overall, increases in temperature
during clinch joining can be expected to remain below 90 K for steel-steel joints
and around 50 K for aluminium-aluminium joints.
author:
- first_name: J.
full_name: Friedlein, J.
last_name: Friedlein
- first_name: P.
full_name: Steinmann, P.
last_name: Steinmann
- first_name: J.
full_name: Mergheim, J.
last_name: Mergheim
citation:
ama: 'Friedlein J, Steinmann P, Mergheim J. Influence of thermal effects on clinch
joining of sheet metal. In: Materials Research Proceedings. Vol 52. Materials
Research Forum LLC; 2025. doi:10.21741/9781644903551-22'
apa: Friedlein, J., Steinmann, P., & Mergheim, J. (2025). Influence of thermal
effects on clinch joining of sheet metal. Materials Research Proceedings,
52. https://doi.org/10.21741/9781644903551-22
bibtex: '@inproceedings{Friedlein_Steinmann_Mergheim_2025, title={Influence of thermal
effects on clinch joining of sheet metal}, volume={52}, DOI={10.21741/9781644903551-22},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Friedlein, J. and Steinmann, P. and Mergheim, J.}, year={2025} }'
chicago: Friedlein, J., P. Steinmann, and J. Mergheim. “Influence of Thermal Effects
on Clinch Joining of Sheet Metal.” In Materials Research Proceedings, Vol.
52. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903551-22.
ieee: 'J. Friedlein, P. Steinmann, and J. Mergheim, “Influence of thermal effects
on clinch joining of sheet metal,” in Materials Research Proceedings, 2025,
vol. 52, doi: 10.21741/9781644903551-22.'
mla: Friedlein, J., et al. “Influence of Thermal Effects on Clinch Joining of Sheet
Metal.” Materials Research Proceedings, vol. 52, Materials Research Forum
LLC, 2025, doi:10.21741/9781644903551-22.
short: 'J. Friedlein, P. Steinmann, J. Mergheim, in: Materials Research Proceedings,
Materials Research Forum LLC, 2025.'
date_created: 2025-09-10T14:33:50Z
date_updated: 2025-09-10T14:37:40Z
doi: 10.21741/9781644903551-22
intvolume: ' 52'
language:
- iso: eng
project:
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
- _id: '131'
name: TRR 285 - Project Area A
- _id: '139'
name: TRR 285 - Subproject A05
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
status: public
title: Influence of thermal effects on clinch joining of sheet metal
type: conference
user_id: '84990'
volume: 52
year: '2025'
...
---
_id: '58491'
abstract:
- lang: eng
text: Similar to bulk metal forming, clinch joining is characterised by
large plastic deformations and a variety of different 3D stress states, including
severe compression. However, inherent to plastic forming is the nucleation and
growth of defects, whose detrimental effects on the material behaviour can be
described by continuum damage models and eventually lead to material failure.
As the damage evolution strongly depends on the stress state, a stress-state-dependent
model is utilised to correctly track the accumulation. To formulate and parameterise
this model, besides classical experiments, so-called modified punch tests are
also integrated herein to enhance the calibration of the failure model by capturing
a larger range of stress states and metal-forming-specific loading conditions.
Moreover, when highly ductile materials are considered, such as the dual-phase
steel HCT590X and the aluminium alloy EN AW-6014 T4 investigated here, strong
necking and localisation might occur prior to fracture. This can alter the stress
state and affect the actual strain at failure. This influence is captured by coupling
plasticity and damage to incorporate the damage-induced softening effect. Its
relative importance is shown by conducting inverse parameter identifications to
determine damage and failure parameters for both mentioned ductile metals based
on up to 12 different experiments.
article_number: '157'
author:
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Max
full_name: Böhnke, Max
last_name: Böhnke
- first_name: Malte
full_name: Schlichter, Malte
last_name: Schlichter
- first_name: Mathias
full_name: Bobbert, Mathias
last_name: Bobbert
- first_name: Gerson
full_name: Meschut, Gerson
last_name: Meschut
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
citation:
ama: Friedlein J, Böhnke M, Schlichter M, et al. Material Parameter Identification
for a Stress-State-Dependent Ductile Damage and Failure Model Applied to Clinch
Joining. Journal of Manufacturing and Materials Processing. 2024;8(4).
doi:10.3390/jmmp8040157
apa: Friedlein, J., Böhnke, M., Schlichter, M., Bobbert, M., Meschut, G., Mergheim,
J., & Steinmann, P. (2024). Material Parameter Identification for a Stress-State-Dependent
Ductile Damage and Failure Model Applied to Clinch Joining. Journal of Manufacturing
and Materials Processing, 8(4), Article 157. https://doi.org/10.3390/jmmp8040157
bibtex: '@article{Friedlein_Böhnke_Schlichter_Bobbert_Meschut_Mergheim_Steinmann_2024,
title={Material Parameter Identification for a Stress-State-Dependent Ductile
Damage and Failure Model Applied to Clinch Joining}, volume={8}, DOI={10.3390/jmmp8040157},
number={4157}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI
AG}, author={Friedlein, Johannes and Böhnke, Max and Schlichter, Malte and Bobbert,
Mathias and Meschut, Gerson and Mergheim, Julia and Steinmann, Paul}, year={2024}
}'
chicago: Friedlein, Johannes, Max Böhnke, Malte Schlichter, Mathias Bobbert, Gerson
Meschut, Julia Mergheim, and Paul Steinmann. “Material Parameter Identification
for a Stress-State-Dependent Ductile Damage and Failure Model Applied to Clinch
Joining.” Journal of Manufacturing and Materials Processing 8, no. 4 (2024).
https://doi.org/10.3390/jmmp8040157.
ieee: 'J. Friedlein et al., “Material Parameter Identification for a Stress-State-Dependent
Ductile Damage and Failure Model Applied to Clinch Joining,” Journal of Manufacturing
and Materials Processing, vol. 8, no. 4, Art. no. 157, 2024, doi: 10.3390/jmmp8040157.'
mla: Friedlein, Johannes, et al. “Material Parameter Identification for a Stress-State-Dependent
Ductile Damage and Failure Model Applied to Clinch Joining.” Journal of Manufacturing
and Materials Processing, vol. 8, no. 4, 157, MDPI AG, 2024, doi:10.3390/jmmp8040157.
short: J. Friedlein, M. Böhnke, M. Schlichter, M. Bobbert, G. Meschut, J. Mergheim,
P. Steinmann, Journal of Manufacturing and Materials Processing 8 (2024).
date_created: 2025-01-31T16:59:13Z
date_updated: 2025-01-31T17:03:34Z
doi: 10.3390/jmmp8040157
intvolume: ' 8'
issue: '4'
keyword:
- ductile damage
- stress-state dependency
- failure
- parameter identification
- punch test
- clinching
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 Manufacturing and Materials Processing
publication_identifier:
issn:
- 2504-4494
publication_status: published
publisher: MDPI AG
status: public
title: Material Parameter Identification for a Stress-State-Dependent Ductile Damage
and Failure Model Applied to Clinch Joining
type: journal_article
user_id: '84990'
volume: 8
year: '2024'
...
---
_id: '61797'
author:
- first_name: Katharina
full_name: Hollmer, Katharina
id: '104582'
last_name: Hollmer
- first_name: Martin
full_name: Kuczyk, Martin
last_name: Kuczyk
- 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
- first_name: Martina
full_name: Zimmermann, Martina
last_name: Zimmermann
citation:
ama: 'Hollmer K, Kuczyk M, Friedlein J, Mergheim J, Steinmann P, Zimmermann M. Charakterisierung
des Verformungszustandes gleichartiger Stahl-Stahl-Clinchverbindungen durch Anwendung
quantitativer Bildanalyse . In: ; 2024.'
apa: Hollmer, K., Kuczyk, M., Friedlein, J., Mergheim, J., Steinmann, P., &
Zimmermann, M. (2024). Charakterisierung des Verformungszustandes gleichartiger
Stahl-Stahl-Clinchverbindungen durch Anwendung quantitativer Bildanalyse .
bibtex: '@inproceedings{Hollmer_Kuczyk_Friedlein_Mergheim_Steinmann_Zimmermann_2024,
title={Charakterisierung des Verformungszustandes gleichartiger Stahl-Stahl-Clinchverbindungen
durch Anwendung quantitativer Bildanalyse }, author={Hollmer, Katharina and Kuczyk,
Martin and Friedlein, Johannes and Mergheim, Julia and Steinmann, Paul and Zimmermann,
Martina}, year={2024} }'
chicago: Hollmer, Katharina, Martin Kuczyk, Johannes Friedlein, Julia Mergheim,
Paul Steinmann, and Martina Zimmermann. “Charakterisierung Des Verformungszustandes
Gleichartiger Stahl-Stahl-Clinchverbindungen Durch Anwendung Quantitativer Bildanalyse
,” 2024.
ieee: K. Hollmer, M. Kuczyk, J. Friedlein, J. Mergheim, P. Steinmann, and M. Zimmermann,
“Charakterisierung des Verformungszustandes gleichartiger Stahl-Stahl-Clinchverbindungen
durch Anwendung quantitativer Bildanalyse ,” 2024.
mla: Hollmer, Katharina, et al. Charakterisierung Des Verformungszustandes Gleichartiger
Stahl-Stahl-Clinchverbindungen Durch Anwendung Quantitativer Bildanalyse .
2024.
short: 'K. Hollmer, M. Kuczyk, J. Friedlein, J. Mergheim, P. Steinmann, M. Zimmermann,
in: 2024.'
date_created: 2025-10-13T15:16:18Z
date_updated: 2025-10-13T15:16:28Z
language:
- iso: eng
project:
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
- _id: '141'
name: TRR 285 - Subproject B02
- _id: '139'
name: TRR 285 - Subproject A05
status: public
title: 'Charakterisierung des Verformungszustandes gleichartiger Stahl-Stahl-Clinchverbindungen
durch Anwendung quantitativer Bildanalyse '
type: conference
user_id: '104582'
year: '2024'
...
---
_id: '43090'
abstract:
- lang: eng
text: Abstract. The application of the mechanical joining process clinching
allows the assembly of different sheet metal materials with a wide range of material
thickness configurations, which is of interest for lightweight multi-material
structures. In order to be able to predict the clinched joint properties as a
function of the individual manufacturing steps, current studies focus on numerical
modeling of the entire clinching process chain. It is essential to be able to
take into account the influence of the joining process-induced damage on the load-bearing
capacity of the joint during the loading phase. This study presents a numerical
damage accumulation in the clinching process based on an implemented Hosford-Coulomb
failure model using a 3D clinching process model applied on the aluminum alloy
EN AW-6014 in temper T4. A correspondence of the experimentally determined failure
location with the element of the highest numerically determined damage accumulation
is shown. Moreover, the experimentally determined failure behavior is predicted
to be in agreement in the numerical loading simulation with transferred pre-damage
from the process simulation.
author:
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: 'Bielak CR, Böhnke M, Friedlein J, et al. Numerical analysis of failure modeling
in clinching process chain simulation. In: Materials Research Proceedings.
Materials Research Forum LLC; 2023. doi:10.21741/9781644902417-33'
apa: Bielak, C. R., Böhnke, M., Friedlein, J., Bobbert, M., Mergheim, J., Steinmann,
P., & Meschut, G. (2023). Numerical analysis of failure modeling in clinching
process chain simulation. Materials Research Proceedings. SHEMET 2023.
https://doi.org/10.21741/9781644902417-33
bibtex: '@inproceedings{Bielak_Böhnke_Friedlein_Bobbert_Mergheim_Steinmann_Meschut_2023,
title={Numerical analysis of failure modeling in clinching process chain simulation},
DOI={10.21741/9781644902417-33},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Bielak, Christian Roman and Böhnke, Max and Friedlein, Johannes
and Bobbert, Mathias and Mergheim, Julia and Steinmann, Paul and Meschut, Gerson},
year={2023} }'
chicago: Bielak, Christian Roman, Max Böhnke, Johannes Friedlein, Mathias Bobbert,
Julia Mergheim, Paul Steinmann, and Gerson Meschut. “Numerical Analysis of Failure
Modeling in Clinching Process Chain Simulation.” In Materials Research Proceedings.
Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902417-33.
ieee: 'C. R. Bielak et al., “Numerical analysis of failure modeling in clinching
process chain simulation,” presented at the SHEMET 2023, 2023, doi: 10.21741/9781644902417-33.'
mla: Bielak, Christian Roman, et al. “Numerical Analysis of Failure Modeling in
Clinching Process Chain Simulation.” Materials Research Proceedings, Materials
Research Forum LLC, 2023, doi:10.21741/9781644902417-33.
short: 'C.R. Bielak, M. Böhnke, J. Friedlein, M. Bobbert, J. Mergheim, P. Steinmann,
G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC,
2023.'
conference:
name: SHEMET 2023
date_created: 2023-03-23T08:13:30Z
date_updated: 2024-03-11T08:14:08Z
department:
- _id: '157'
doi: 10.21741/9781644902417-33
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: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Numerical analysis of failure modeling in clinching process chain simulation
type: conference
user_id: '45779'
year: '2023'
...
---
_id: '43462'
abstract:
- lang: eng
text: Abstract. In the numerical simulation of mechanical joining technologies
such as clinching, the material modeling of the joining parts is of major importance.
This includes modeling the damage and failure behavior of the materials in accordance
with varying occurring stress states. This paper presents a calibration method
of three different fracture models. The calibration of the models is done by use
of experimental data from a modified punch test, tensile test and bulge test in
order to map the occurring stress states from clinching processes and to precisely
model the resulting failure behavior. Experimental investigations were carried
out for an aluminum alloy EN AW-6014 in temper T4 and compared with the simulative
results generated in LS-DYNA. The comparison of force-displacement curves and
failure initiation shows that the Hosford–Coulomb model predicts the failure behavior
for the material used and the tests applied with the best accuracy.
author:
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: 'Böhnke M, Bielak CR, Friedlein J, et al. A calibration method for failure
modeling in clinching process simulations. In: Materials Research Proceedings.
Materials Research Forum LLC; 2023. doi:10.21741/9781644902417-34'
apa: Böhnke, M., Bielak, C. R., Friedlein, J., Bobbert, M., Mergheim, J., Steinmann,
P., & Meschut, G. (2023). A calibration method for failure modeling in clinching
process simulations. Materials Research Proceedings. https://doi.org/10.21741/9781644902417-34
bibtex: '@inproceedings{Böhnke_Bielak_Friedlein_Bobbert_Mergheim_Steinmann_Meschut_2023,
title={A calibration method for failure modeling in clinching process simulations},
DOI={10.21741/9781644902417-34},
booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
LLC}, author={Böhnke, Max and Bielak, Christian Roman and Friedlein, Johannes
and Bobbert, Mathias and Mergheim, Julia and Steinmann, Paul and Meschut, Gerson},
year={2023} }'
chicago: Böhnke, Max, Christian Roman Bielak, Johannes Friedlein, Mathias Bobbert,
Julia Mergheim, Paul Steinmann, and Gerson Meschut. “A Calibration Method for
Failure Modeling in Clinching Process Simulations.” In Materials Research Proceedings.
Materials Research Forum LLC, 2023. https://doi.org/10.21741/9781644902417-34.
ieee: 'M. Böhnke et al., “A calibration method for failure modeling in clinching
process simulations,” 2023, doi: 10.21741/9781644902417-34.'
mla: Böhnke, Max, et al. “A Calibration Method for Failure Modeling in Clinching
Process Simulations.” Materials Research Proceedings, Materials Research
Forum LLC, 2023, doi:10.21741/9781644902417-34.
short: 'M. Böhnke, C.R. Bielak, J. Friedlein, M. Bobbert, J. Mergheim, P. Steinmann,
G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC,
2023.'
date_created: 2023-04-13T07:42:53Z
date_updated: 2024-03-11T08:14:53Z
department:
- _id: '157'
doi: 10.21741/9781644902417-34
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _id: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
publication: Materials Research Proceedings
publication_identifier:
issn:
- 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: A calibration method for failure modeling in clinching process simulations
type: conference
user_id: '45779'
year: '2023'
...
---
_id: '43463'
author:
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: 'Friedlein J, Bielak CR, Böhnke M, et al. Influence of plastic orthotropy on
clinching of sheet metal. In: Materials Research Proceedings. Materials
Research Forum LLC; 2023. doi:10.21741/9781644902417-17 '
apa: Friedlein, J., Bielak, C. R., Böhnke, M., Bobbert, M., Mergheim, J., Steinmann,
P., & Meschut, G. (2023). Influence of plastic orthotropy on clinching of
sheet metal. Materials Research Proceedings. https://doi.org/10.21741/9781644902417-17
bibtex: '@inproceedings{Friedlein_Bielak_Böhnke_Bobbert_Mergheim_Steinmann_Meschut_2023,
title={Influence of plastic orthotropy on clinching of sheet metal}, DOI={10.21741/9781644902417-17 }, booktitle={Materials Research Proceedings},
publisher={Materials Research Forum LLC}, author={Friedlein, Johannes and Bielak,
Christian Roman and Böhnke, Max and Bobbert, Mathias and Mergheim, Julia and Steinmann,
Paul and Meschut, Gerson}, year={2023} }'
chicago: Friedlein, Johannes, Christian Roman Bielak, Max Böhnke, Mathias Bobbert,
Julia Mergheim, Paul Steinmann, and Gerson Meschut. “Influence of Plastic Orthotropy
on Clinching of Sheet Metal.” In Materials Research Proceedings. Materials
Research Forum LLC, 2023. https://doi.org/10.21741/9781644902417-17
.
ieee: 'J. Friedlein et al., “Influence of plastic orthotropy on clinching
of sheet metal,” 2023, doi: 10.21741/9781644902417-17 .'
mla: Friedlein, Johannes, et al. “Influence of Plastic Orthotropy on Clinching of
Sheet Metal.” Materials Research Proceedings, Materials Research Forum
LLC, 2023, doi:10.21741/9781644902417-17
.
short: 'J. Friedlein, C.R. Bielak, M. Böhnke, M. Bobbert, J. Mergheim, P. Steinmann,
G. Meschut, in: Materials Research Proceedings, Materials Research Forum LLC,
2023.'
date_created: 2023-04-13T07:50:05Z
date_updated: 2024-03-11T08:13:57Z
department:
- _id: '157'
doi: '10.21741/9781644902417-17 '
language:
- iso: eng
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'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
publication: Materials Research Proceedings
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Influence of plastic orthotropy on clinching of sheet metal
type: conference
user_id: '45779'
year: '2023'
...
---
_id: '56097'
abstract:
- lang: eng
text: We contrast different gradient-enhancements for plasticity-damage material
models in the logarithmic strain space and compare them to reference models based
on multiplicative plasticity. The models being compared include plasticity - gradient-damage,
where the gradient-enhancement is applied on the local damage variable, and gradient-plasticity
- damage with a gradient-enhanced plastic hardening variable. Thereby, gradient-plasticity
proved to be able to simultaneously regularise plastic and ductile (plasticity-driven)
damage localisation as confirmed by numerical localisation analyses. This appears
to be especially advantageous for logarithmic strain space plasticity-damage,
because of the observed plastic localisation even for the case of plasticity with
hardening. Even though gradient-plasticity appears to be numerically more demanding,
two numerical examples indicate a good robustness and mesh objectivity in the
softening regime. Moreover, the internal length for plasticity is able to adjust
the damage zone width, similarly to gradient-damage, however ensuring a priori
that damage takes place exclusively inside the plastic zone.
article_number: '104946'
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. Efficient gradient enhancements for plasticity
with ductile damage in the logarithmic strain space. European Journal of Mechanics
- A/Solids. 2023;99. doi:10.1016/j.euromechsol.2023.104946
apa: Friedlein, J., Mergheim, J., & Steinmann, P. (2023). Efficient gradient
enhancements for plasticity with ductile damage in the logarithmic strain space.
European Journal of Mechanics - A/Solids, 99, Article 104946. https://doi.org/10.1016/j.euromechsol.2023.104946
bibtex: '@article{Friedlein_Mergheim_Steinmann_2023, title={Efficient gradient enhancements
for plasticity with ductile damage in the logarithmic strain space}, volume={99},
DOI={10.1016/j.euromechsol.2023.104946},
number={104946}, journal={European Journal of Mechanics - A/Solids}, publisher={Elsevier
BV}, author={Friedlein, Johannes and Mergheim, Julia and Steinmann, Paul}, year={2023}
}'
chicago: Friedlein, Johannes, Julia Mergheim, and Paul Steinmann. “Efficient Gradient
Enhancements for Plasticity with Ductile Damage in the Logarithmic Strain Space.”
European Journal of Mechanics - A/Solids 99 (2023). https://doi.org/10.1016/j.euromechsol.2023.104946.
ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “Efficient gradient enhancements
for plasticity with ductile damage in the logarithmic strain space,” European
Journal of Mechanics - A/Solids, vol. 99, Art. no. 104946, 2023, doi: 10.1016/j.euromechsol.2023.104946.'
mla: Friedlein, Johannes, et al. “Efficient Gradient Enhancements for Plasticity
with Ductile Damage in the Logarithmic Strain Space.” European Journal of Mechanics
- A/Solids, vol. 99, 104946, Elsevier BV, 2023, doi:10.1016/j.euromechsol.2023.104946.
short: J. Friedlein, J. Mergheim, P. Steinmann, European Journal of Mechanics -
A/Solids 99 (2023).
date_created: 2024-09-10T15:23:49Z
date_updated: 2026-02-24T14:37:05Z
doi: 10.1016/j.euromechsol.2023.104946
intvolume: ' 99'
keyword:
- Finite plasticity
- Logarithmic strain space
- Ductile damage
- Gradient-enhancement
- Gradient-plasticity
- Gradient-damage
- Loss of ellipticity
language:
- iso: eng
project:
- _id: '130'
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'
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
publication: European Journal of Mechanics - A/Solids
publication_identifier:
issn:
- 0997-7538
publication_status: published
publisher: Elsevier BV
status: public
title: Efficient gradient enhancements for plasticity with ductile damage in the logarithmic
strain space
type: journal_article
user_id: '84990'
volume: 99
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: The Minerals, Metals
& Materials Series. Springer International Publishing; 2022. doi:10.1007/978-3-031-06212-4_31'
apa: Friedlein, J., Mergheim, J., & Steinmann, P. (2022). Influence of Kinematic
Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal. In The
Minerals, Metals & Materials Series. Springer International Publishing.
https://doi.org/10.1007/978-3-031-06212-4_31
bibtex: '@inbook{Friedlein_Mergheim_Steinmann_2022, place={Cham}, title={Influence
of Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal},
DOI={10.1007/978-3-031-06212-4_31},
booktitle={The Minerals, Metals & 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 The Minerals, Metals & Materials Series. Cham: Springer International
Publishing, 2022. https://doi.org/10.1007/978-3-031-06212-4_31.'
ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “Influence of Kinematic Hardening
on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal,” in The Minerals,
Metals & Materials Series, Cham: Springer International Publishing,
2022.'
mla: Friedlein, Johannes, et al. “Influence of Kinematic Hardening on Clinch Joining
of Dual-Phase Steel HCT590X Sheet Metal.” The Minerals, Metals & Materials
Series, Springer International Publishing, 2022, doi:10.1007/978-3-031-06212-4_31.
short: 'J. Friedlein, J. Mergheim, P. Steinmann, in: The Minerals, Metals &
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 & 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: '30627'
abstract:
- lang: eng
text: Additive plasticity in the logarithmic strain space is compared to multiplicative
plasticity for various loading cases including coaxial and non-coaxial plastic
deformations. Even though both finite plasticity approaches are based on total
Lagrangian descriptions, the former is popular due to its inherent similarity
to the infinitesimal theory and its easy extensibility. However, since its introduction
several limitations of additive plasticity in the logarithmic strain space have
been discovered. In this study, these problems such as stress rotation and softening
are considered, revealing that fundamental differences compared to multiplicative
plasticity occur for non-coaxial plastic deformations. We focus in particular
on the observed softer response of the additive based approach, which is analysed
in depth using three numerical examples including two well-known benchmarks for
finite plasticity. By means of these finite element simulations the softer and
possibly even localising response of additive plasticity in the logarithmic strain
space is confirmed.
author:
- first_name: J.
full_name: Friedlein, J.
last_name: Friedlein
- first_name: J.
full_name: Mergheim, J.
last_name: Mergheim
- first_name: P.
full_name: Steinmann, P.
last_name: Steinmann
citation:
ama: Friedlein J, Mergheim J, Steinmann P. Observations on additive plasticity in
the logarithmic strain space at excessive strains. International Journal of
Solids and Structures. 2022;239-240:111416. doi:10.1016/j.ijsolstr.2021.111416
apa: Friedlein, J., Mergheim, J., & Steinmann, P. (2022). Observations on additive
plasticity in the logarithmic strain space at excessive strains. International
Journal of Solids and Structures, 239–240, 111416. https://doi.org/10.1016/j.ijsolstr.2021.111416
bibtex: '@article{Friedlein_Mergheim_Steinmann_2022, title={Observations on additive
plasticity in the logarithmic strain space at excessive strains}, volume={239–240},
DOI={10.1016/j.ijsolstr.2021.111416},
journal={International Journal of Solids and Structures}, author={Friedlein, J.
and Mergheim, J. and Steinmann, P.}, year={2022}, pages={111416} }'
chicago: 'Friedlein, J., J. Mergheim, and P. Steinmann. “Observations on Additive
Plasticity in the Logarithmic Strain Space at Excessive Strains.” International
Journal of Solids and Structures 239–240 (2022): 111416. https://doi.org/10.1016/j.ijsolstr.2021.111416.'
ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “Observations on additive plasticity
in the logarithmic strain space at excessive strains,” International Journal
of Solids and Structures, vol. 239–240, p. 111416, 2022, doi: 10.1016/j.ijsolstr.2021.111416.'
mla: Friedlein, J., et al. “Observations on Additive Plasticity in the Logarithmic
Strain Space at Excessive Strains.” International Journal of Solids and Structures,
vol. 239–240, 2022, p. 111416, doi:10.1016/j.ijsolstr.2021.111416.
short: J. Friedlein, J. Mergheim, P. Steinmann, International Journal of Solids
and Structures 239–240 (2022) 111416.
date_created: 2022-03-28T10:29:47Z
date_updated: 2023-01-02T10:56:30Z
department:
- _id: '630'
doi: 10.1016/j.ijsolstr.2021.111416
language:
- iso: eng
page: '111416'
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: International Journal of Solids and Structures
status: public
title: Observations on additive plasticity in the logarithmic strain space at excessive
strains
type: journal_article
user_id: '14931'
volume: 239-240
year: '2022'
...
---
_id: '34070'
article_number: '100135'
author:
- first_name: Britta
full_name: Schramm, Britta
id: '4668'
last_name: Schramm
- first_name: Sven
full_name: Harzheim, Sven
last_name: Harzheim
- first_name: Deborah
full_name: Weiß, Deborah
id: '45673'
last_name: Weiß
- first_name: Tintu David
full_name: Joy, Tintu David
id: '30821'
last_name: Joy
- first_name: Martin
full_name: Hofmann, Martin
last_name: Hofmann
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Thomas
full_name: Wallmersperger, Thomas
last_name: Wallmersperger
citation:
ama: 'Schramm B, Harzheim S, Weiß D, et al. A Review on the Modeling of the Clinching
Process Chain - Part III: Operational Phase. Journal of Advanced Joining Processes.
Published online 2022. doi:10.1016/j.jajp.2022.100135'
apa: 'Schramm, B., Harzheim, S., Weiß, D., Joy, T. D., Hofmann, M., Mergheim, J.,
& Wallmersperger, T. (2022). A Review on the Modeling of the Clinching Process
Chain - Part III: Operational Phase. Journal of Advanced Joining Processes,
Article 100135. https://doi.org/10.1016/j.jajp.2022.100135'
bibtex: '@article{Schramm_Harzheim_Weiß_Joy_Hofmann_Mergheim_Wallmersperger_2022,
title={A Review on the Modeling of the Clinching Process Chain - Part III: Operational
Phase}, DOI={10.1016/j.jajp.2022.100135},
number={100135}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
BV}, author={Schramm, Britta and Harzheim, Sven and Weiß, Deborah and Joy, Tintu
David and Hofmann, Martin and Mergheim, Julia and Wallmersperger, Thomas}, year={2022}
}'
chicago: 'Schramm, Britta, Sven Harzheim, Deborah Weiß, Tintu David Joy, Martin
Hofmann, Julia Mergheim, and Thomas Wallmersperger. “A Review on the Modeling
of the Clinching Process Chain - Part III: Operational Phase.” Journal of Advanced
Joining Processes, 2022. https://doi.org/10.1016/j.jajp.2022.100135.'
ieee: 'B. Schramm et al., “A Review on the Modeling of the Clinching Process
Chain - Part III: Operational Phase,” Journal of Advanced Joining Processes,
Art. no. 100135, 2022, doi: 10.1016/j.jajp.2022.100135.'
mla: 'Schramm, Britta, et al. “A Review on the Modeling of the Clinching Process
Chain - Part III: Operational Phase.” Journal of Advanced Joining Processes,
100135, Elsevier BV, 2022, doi:10.1016/j.jajp.2022.100135.'
short: B. Schramm, S. Harzheim, D. Weiß, T.D. Joy, M. Hofmann, J. Mergheim, T. Wallmersperger,
Journal of Advanced Joining Processes (2022).
date_created: 2022-11-14T08:55:34Z
date_updated: 2023-04-27T10:14:11Z
department:
- _id: '143'
doi: 10.1016/j.jajp.2022.100135
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Engineering (miscellaneous)
- Chemical Engineering (miscellaneous)
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '143'
name: 'TRR 285 – B04: TRR 285 - Subproject B04'
- _id: '142'
name: 'TRR 285 – B03: TRR 285 - Subproject B03'
- _id: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: 'A Review on the Modeling of the Clinching Process Chain - Part III: Operational
Phase'
type: journal_article
user_id: '45673'
year: '2022'
...
---
_id: '34069'
article_number: '100133'
author:
- first_name: Britta
full_name: Schramm, Britta
id: '4668'
last_name: Schramm
- first_name: Sven
full_name: Martin, Sven
id: '38177'
last_name: Martin
- first_name: Christian
full_name: Steinfelder, Christian
last_name: Steinfelder
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Alexander
full_name: Brosius, Alexander
last_name: Brosius
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
- first_name: Thomas
full_name: Wallmersperger, Thomas
last_name: Wallmersperger
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
citation:
ama: 'Schramm B, Martin S, Steinfelder C, et al. A Review on the Modeling of the
Clinching Process Chain - Part I: Design Phase. Journal of Advanced Joining
Processes. 2022;6. doi:10.1016/j.jajp.2022.100133'
apa: 'Schramm, B., Martin, S., Steinfelder, C., Bielak, C. R., Brosius, A., Meschut,
G., Tröster, T., Wallmersperger, T., & Mergheim, J. (2022). A Review on the
Modeling of the Clinching Process Chain - Part I: Design Phase. Journal of
Advanced Joining Processes, 6, Article 100133. https://doi.org/10.1016/j.jajp.2022.100133'
bibtex: '@article{Schramm_Martin_Steinfelder_Bielak_Brosius_Meschut_Tröster_Wallmersperger_Mergheim_2022,
title={A Review on the Modeling of the Clinching Process Chain - Part I: Design
Phase}, volume={6}, DOI={10.1016/j.jajp.2022.100133},
number={100133}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
BV}, author={Schramm, Britta and Martin, Sven and Steinfelder, Christian and Bielak,
Christian Roman and Brosius, Alexander and Meschut, Gerson and Tröster, Thomas
and Wallmersperger, Thomas and Mergheim, Julia}, year={2022} }'
chicago: 'Schramm, Britta, Sven Martin, Christian Steinfelder, Christian Roman Bielak,
Alexander Brosius, Gerson Meschut, Thomas Tröster, Thomas Wallmersperger, and
Julia Mergheim. “A Review on the Modeling of the Clinching Process Chain - Part
I: Design Phase.” Journal of Advanced Joining Processes 6 (2022). https://doi.org/10.1016/j.jajp.2022.100133.'
ieee: 'B. Schramm et al., “A Review on the Modeling of the Clinching Process
Chain - Part I: Design Phase,” Journal of Advanced Joining Processes, vol.
6, Art. no. 100133, 2022, doi: 10.1016/j.jajp.2022.100133.'
mla: 'Schramm, Britta, et al. “A Review on the Modeling of the Clinching Process
Chain - Part I: Design Phase.” Journal of Advanced Joining Processes, vol.
6, 100133, Elsevier BV, 2022, doi:10.1016/j.jajp.2022.100133.'
short: B. Schramm, S. Martin, C. Steinfelder, C.R. Bielak, A. Brosius, G. Meschut,
T. Tröster, T. Wallmersperger, J. Mergheim, Journal of Advanced Joining Processes
6 (2022).
date_created: 2022-11-14T08:53:49Z
date_updated: 2023-04-28T11:30:38Z
department:
- _id: '143'
- _id: '157'
doi: 10.1016/j.jajp.2022.100133
intvolume: ' 6'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Engineering (miscellaneous)
- Chemical Engineering (miscellaneous)
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '143'
name: 'TRR 285 – B04: TRR 285 - Subproject B04'
- _id: '140'
name: 'TRR 285 – B01: TRR 285 - Subproject B01'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _id: '142'
name: 'TRR 285 – B03: TRR 285 - Subproject B03'
- _id: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: 'A Review on the Modeling of the Clinching Process Chain - Part I: Design Phase'
type: journal_article
user_id: '34782'
volume: 6
year: '2022'
...
---
_id: '34068'
article_number: '100134'
author:
- first_name: Britta
full_name: Schramm, Britta
id: '4668'
last_name: Schramm
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Benjamin
full_name: Gröger, Benjamin
last_name: Gröger
- 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: Maik
full_name: Gude, Maik
last_name: Gude
- 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
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
citation:
ama: 'Schramm B, Friedlein J, Gröger B, et al. A Review on the Modeling of the Clinching
Process Chain - Part II: Joining Process. Journal of Advanced Joining Processes.
Published online 2022. doi:10.1016/j.jajp.2022.100134'
apa: 'Schramm, B., Friedlein, J., Gröger, B., Bielak, C. R., Bobbert, M., Gude,
M., Meschut, G., Wallmersperger, T., & Mergheim, J. (2022). A Review on the
Modeling of the Clinching Process Chain - Part II: Joining Process. Journal
of Advanced Joining Processes, Article 100134. https://doi.org/10.1016/j.jajp.2022.100134'
bibtex: '@article{Schramm_Friedlein_Gröger_Bielak_Bobbert_Gude_Meschut_Wallmersperger_Mergheim_2022,
title={A Review on the Modeling of the Clinching Process Chain - Part II: Joining
Process}, DOI={10.1016/j.jajp.2022.100134},
number={100134}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
BV}, author={Schramm, Britta and Friedlein, Johannes and Gröger, Benjamin and
Bielak, Christian Roman and Bobbert, Mathias and Gude, Maik and Meschut, Gerson
and Wallmersperger, Thomas and Mergheim, Julia}, year={2022} }'
chicago: 'Schramm, Britta, Johannes Friedlein, Benjamin Gröger, Christian Roman
Bielak, Mathias Bobbert, Maik Gude, Gerson Meschut, Thomas Wallmersperger, and
Julia Mergheim. “A Review on the Modeling of the Clinching Process Chain - Part
II: Joining Process.” Journal of Advanced Joining Processes, 2022. https://doi.org/10.1016/j.jajp.2022.100134.'
ieee: 'B. Schramm et al., “A Review on the Modeling of the Clinching Process
Chain - Part II: Joining Process,” Journal of Advanced Joining Processes,
Art. no. 100134, 2022, doi: 10.1016/j.jajp.2022.100134.'
mla: 'Schramm, Britta, et al. “A Review on the Modeling of the Clinching Process
Chain - Part II: Joining Process.” Journal of Advanced Joining Processes,
100134, Elsevier BV, 2022, doi:10.1016/j.jajp.2022.100134.'
short: B. Schramm, J. Friedlein, B. Gröger, C.R. Bielak, M. Bobbert, M. Gude, G.
Meschut, T. Wallmersperger, J. Mergheim, Journal of Advanced Joining Processes
(2022).
date_created: 2022-11-14T08:53:07Z
date_updated: 2023-04-28T11:31:03Z
department:
- _id: '143'
- _id: '157'
doi: 10.1016/j.jajp.2022.100134
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Engineering (miscellaneous)
- Chemical Engineering (miscellaneous)
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '143'
name: 'TRR 285 – B04: TRR 285 - Subproject B04'
- _id: '139'
name: 'TRR 285 – A05: TRR 285 - Subproject A05'
- _id: '137'
name: 'TRR 285 – A03: TRR 285 - Subproject A03'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _id: '142'
name: 'TRR 285 – B03: TRR 285 - Subproject B03'
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: 'A Review on the Modeling of the Clinching Process Chain - Part II: Joining
Process'
type: journal_article
user_id: '34782'
year: '2022'
...
---
_id: '30647'
abstract:
- lang: eng
text: The increasing economic and ecological demands on the mobility sector require
efforts to reduce resource consumption in both the production and utilization
phases. The use of lightweight construction technologies can save material and
increase energy efficiency during operation. Multi-material systems consisting
of different materials and geometries are used to achieve weight reduction. Since
conventional joining processes reach their limits in the connection of these components,
new methods and technologies are necessary in order to be able to react versatilely
to varying process and disturbance variables. For fundamental investigations of
new possibilities in joining technology, numerical investigations are helpful
to identify process parameters. To generate valid results, robust and efficient
material models are developed which are adapted to the requirements of versatile
joining technologies, for instance to the high plastic strains associated with
self-piercing riveting. To describe the inherent strain-induced plastic orthotropy
of sheet metal an anisotropic Hill-plasticity model is formulated. Tensile tests
for different sheet orientations are conducted both experimentally and numerically
to adjust the anisotropic material parameters by inverse parameter identification
for aluminium EN AW-6014 and steel HCT590X. Then, the layer compression test is
used to validate the model and the previously identified parameters.
author:
- first_name: J.
full_name: Friedlein, J.
last_name: Friedlein
- first_name: S.
full_name: Wituschek, S.
last_name: Wituschek
- first_name: M.
full_name: Lechner, M.
last_name: Lechner
- first_name: J.
full_name: Mergheim, J.
last_name: Mergheim
- first_name: P.
full_name: Steinmann, P.
last_name: Steinmann
citation:
ama: 'Friedlein J, Wituschek S, Lechner M, Mergheim J, Steinmann P. Inverse parameter
identification of an anisotropic plasticity model for sheet metal. IOP Conference
Series: Materials Science and Engineering. 2021;1157:012004. doi:10.1088/1757-899X/1157/1/012004'
apa: 'Friedlein, J., Wituschek, S., Lechner, M., Mergheim, J., & Steinmann,
P. (2021). Inverse parameter identification of an anisotropic plasticity model
for sheet metal. IOP Conference Series: Materials Science and Engineering,
1157, 012004. https://doi.org/10.1088/1757-899X/1157/1/012004'
bibtex: '@article{Friedlein_Wituschek_Lechner_Mergheim_Steinmann_2021, title={Inverse
parameter identification of an anisotropic plasticity model for sheet metal},
volume={1157}, DOI={10.1088/1757-899X/1157/1/012004},
journal={IOP Conference Series: Materials Science and Engineering}, author={Friedlein,
J. and Wituschek, S. and Lechner, M. and Mergheim, J. and Steinmann, P.}, year={2021},
pages={012004} }'
chicago: 'Friedlein, J., S. Wituschek, M. Lechner, J. Mergheim, and P. Steinmann.
“Inverse Parameter Identification of an Anisotropic Plasticity Model for Sheet
Metal.” IOP Conference Series: Materials Science and Engineering 1157 (2021):
012004. https://doi.org/10.1088/1757-899X/1157/1/012004.'
ieee: 'J. Friedlein, S. Wituschek, M. Lechner, J. Mergheim, and P. Steinmann, “Inverse
parameter identification of an anisotropic plasticity model for sheet metal,”
IOP Conference Series: Materials Science and Engineering, vol. 1157, p.
012004, 2021, doi: 10.1088/1757-899X/1157/1/012004.'
mla: 'Friedlein, J., et al. “Inverse Parameter Identification of an Anisotropic
Plasticity Model for Sheet Metal.” IOP Conference Series: Materials Science
and Engineering, vol. 1157, 2021, p. 012004, doi:10.1088/1757-899X/1157/1/012004.'
short: 'J. Friedlein, S. Wituschek, M. Lechner, J. Mergheim, P. Steinmann, IOP Conference
Series: Materials Science and Engineering 1157 (2021) 012004.'
date_created: 2022-03-28T12:42:10Z
date_updated: 2022-03-29T12:45:57Z
doi: 10.1088/1757-899X/1157/1/012004
intvolume: ' 1157'
language:
- iso: eng
page: '012004'
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'
- _id: '133'
name: 'TRR 285 - C: TRR 285 - Project Area C'
- _id: '146'
name: 'TRR 285 – C02: TRR 285 - Subproject C02'
publication: 'IOP Conference Series: Materials Science and Engineering'
status: public
title: Inverse parameter identification of an anisotropic plasticity model for sheet
metal
type: journal_article
user_id: '68518'
volume: 1157
year: '2021'
...
---
_id: '30644'
abstract:
- lang: eng
text: Computational homogenization is a powerful tool allowing to obtain homogenized
properties of materials on the macroscale from simulations of the underlying microstructure.
The response of the microstructure is, however, strongly affected by variations
in the microstructure geometry. In particular, we consider heterogeneous materials
with randomly distributed non-overlapping inclusions, which radii are also random.
In this work we extend the earlier proposed non-deterministic computational homogenization
framework to plastic materials, thereby increasing the model versatility and overall
realism. We apply novel soft periodic boundary conditions and estimate their effect
in case of non-periodic material microstructures. We study macroscopic plasticity
signatures like the macroscopic von-Mises stress and make useful conclusions for
further constitutive modeling. Simulations demonstrate the effect of the novel
boundary conditions, which significantly differ from the standard periodic boundary
conditions, and the large influence of parameter variations and hence the importance
of the stochastic modeling.
author:
- first_name: D.
full_name: Pivovarov, D.
last_name: Pivovarov
- first_name: J.
full_name: Mergheim, J.
last_name: Mergheim
- first_name: K.
full_name: Willner, K.
last_name: Willner
- first_name: P.
full_name: Steinmann, P.
last_name: Steinmann
citation:
ama: Pivovarov D, Mergheim J, Willner K, Steinmann P. Stochastic local FEM for computational
homogenization of heterogeneous materials exhibiting large plastic deformations.
Computational Mechanics. Published online 2021. doi:10.1007/s00466-021-02099-x
apa: Pivovarov, D., Mergheim, J., Willner, K., & Steinmann, P. (2021). Stochastic
local FEM for computational homogenization of heterogeneous materials exhibiting
large plastic deformations. Computational Mechanics. https://doi.org/10.1007/s00466-021-02099-x
bibtex: '@article{Pivovarov_Mergheim_Willner_Steinmann_2021, title={Stochastic local
FEM for computational homogenization of heterogeneous materials exhibiting large
plastic deformations}, DOI={10.1007/s00466-021-02099-x},
journal={Computational Mechanics}, author={Pivovarov, D. and Mergheim, J. and
Willner, K. and Steinmann, P.}, year={2021} }'
chicago: Pivovarov, D., J. Mergheim, K. Willner, and P. Steinmann. “Stochastic Local
FEM for Computational Homogenization of Heterogeneous Materials Exhibiting Large
Plastic Deformations.” Computational Mechanics, 2021. https://doi.org/10.1007/s00466-021-02099-x.
ieee: 'D. Pivovarov, J. Mergheim, K. Willner, and P. Steinmann, “Stochastic local
FEM for computational homogenization of heterogeneous materials exhibiting large
plastic deformations,” Computational Mechanics, 2021, doi: 10.1007/s00466-021-02099-x.'
mla: Pivovarov, D., et al. “Stochastic Local FEM for Computational Homogenization
of Heterogeneous Materials Exhibiting Large Plastic Deformations.” Computational
Mechanics, 2021, doi:10.1007/s00466-021-02099-x.
short: D. Pivovarov, J. Mergheim, K. Willner, P. Steinmann, Computational Mechanics
(2021).
date_created: 2022-03-28T12:24:19Z
date_updated: 2022-03-29T12:42:38Z
doi: 10.1007/s00466-021-02099-x
language:
- iso: eng
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: Computational Mechanics
status: public
title: Stochastic local FEM for computational homogenization of heterogeneous materials
exhibiting large plastic deformations
type: journal_article
user_id: '68518'
year: '2021'
...
---
_id: '30642'
abstract:
- lang: eng
text: Sheet metal forming as well as mechanical joining demand increasingly accurate
and efficient material modelling to capture large deformations, the inherent sheet
orthotropy and even process-induced damage, which is expected to be influential.
To account for large strains the additive logarithmic strain space is utilised
that enables a straightforward incorporation of plastic anisotropy, herein modelled
by a Hill48 yield function. A gradient-enhancement is used to equip the ductile
damage model with an internal length scale curing the damage-induced localisation.
An affine combination of the local and non-local softening variable is derived
enabling a more efficient single surface formulation for the regularised plasticity-damage
material model.
author:
- first_name: J.
full_name: Friedlein, J.
last_name: Friedlein
- first_name: J.
full_name: Mergheim, J.
last_name: Mergheim
- first_name: P.
full_name: Steinmann, P.
last_name: Steinmann
citation:
ama: Friedlein J, Mergheim J, Steinmann P. Anisotropic plasticity‐damage material
model for sheet metal — Regularised single surface formulation. PAMM. 2021;21.
doi:10.1002/pamm.202100068
apa: Friedlein, J., Mergheim, J., & Steinmann, P. (2021). Anisotropic plasticity‐damage
material model for sheet metal — Regularised single surface formulation. PAMM,
21. https://doi.org/10.1002/pamm.202100068
bibtex: '@article{Friedlein_Mergheim_Steinmann_2021, title={Anisotropic plasticity‐damage
material model for sheet metal — Regularised single surface formulation}, volume={21},
DOI={10.1002/pamm.202100068},
journal={PAMM}, author={Friedlein, J. and Mergheim, J. and Steinmann, P.}, year={2021}
}'
chicago: Friedlein, J., J. Mergheim, and P. Steinmann. “Anisotropic Plasticity‐damage
Material Model for Sheet Metal — Regularised Single Surface Formulation.” PAMM
21 (2021). https://doi.org/10.1002/pamm.202100068.
ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “Anisotropic plasticity‐damage
material model for sheet metal — Regularised single surface formulation,” PAMM,
vol. 21, 2021, doi: 10.1002/pamm.202100068.'
mla: Friedlein, J., et al. “Anisotropic Plasticity‐damage Material Model for Sheet
Metal — Regularised Single Surface Formulation.” PAMM, vol. 21, 2021, doi:10.1002/pamm.202100068.
short: J. Friedlein, J. Mergheim, P. Steinmann, PAMM 21 (2021).
date_created: 2022-03-28T12:18:16Z
date_updated: 2022-03-29T12:40:59Z
doi: 10.1002/pamm.202100068
intvolume: ' 21'
language:
- iso: eng
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: PAMM
status: public
title: Anisotropic plasticity‐damage material model for sheet metal — Regularised
single surface formulation
type: journal_article
user_id: '68518'
volume: 21
year: '2021'
...
---
_id: '30694'
abstract:
- lang: eng
text: In recent years, clinching has gathered popularity to join sheets of different
materials in industrial applications. The manufacturing process has some advantages,
as reduced joining time, reduced costs, and the joints show good fatigue properties.
To ensure the joint strength, reliable simulations of the material behaviour accounting
for process-induced damage are expected to be beneficial to obtain credible values
for the ultimate joint strength and its fatigue limit. A finite plasticity gradient-damage
material model is outlined to describe the plastic and damage evolutions during
the forming of sheet metals, later applied to clinching. The utilised gradient-enhancement
cures the damage-induced localisation by introducing a global damage variable
as an additional finite element field. Both, plasticity and damage are strongly
coupled, but can, due to a dual-surface approach, evolve independently. The ability
of the material model to predict damage in strongly deformed sheets, its flexibility
and its regularization properties are illustrated by numerical examples.
author:
- first_name: J.
full_name: Friedlein, J.
last_name: Friedlein
- first_name: J.
full_name: Mergheim, J.
last_name: Mergheim
- first_name: P.
full_name: Steinmann, P.
last_name: Steinmann
citation:
ama: Friedlein J, Mergheim J, Steinmann P. A finite plasticity gradient-damage model
for sheet metals during forming and clinching. Key Engineering Materials.
2021;883 KEM:57. doi:10.4028/www.scientific.net/KEM.883.57
apa: Friedlein, J., Mergheim, J., & Steinmann, P. (2021). A finite plasticity
gradient-damage model for sheet metals during forming and clinching. Key Engineering
Materials, 883 KEM, 57. https://doi.org/10.4028/www.scientific.net/KEM.883.57
bibtex: '@article{Friedlein_Mergheim_Steinmann_2021, title={A finite plasticity
gradient-damage model for sheet metals during forming and clinching}, volume={883
KEM}, DOI={10.4028/www.scientific.net/KEM.883.57},
journal={Key Engineering Materials}, author={Friedlein, J. and Mergheim, J. and
Steinmann, P.}, year={2021}, pages={57} }'
chicago: 'Friedlein, J., J. Mergheim, and P. Steinmann. “A Finite Plasticity Gradient-Damage
Model for Sheet Metals during Forming and Clinching.” Key Engineering Materials
883 KEM (2021): 57. https://doi.org/10.4028/www.scientific.net/KEM.883.57.'
ieee: 'J. Friedlein, J. Mergheim, and P. Steinmann, “A finite plasticity gradient-damage
model for sheet metals during forming and clinching,” Key Engineering Materials,
vol. 883 KEM, p. 57, 2021, doi: 10.4028/www.scientific.net/KEM.883.57.'
mla: Friedlein, J., et al. “A Finite Plasticity Gradient-Damage Model for Sheet
Metals during Forming and Clinching.” Key Engineering Materials, vol. 883
KEM, 2021, p. 57, doi:10.4028/www.scientific.net/KEM.883.57.
short: J. Friedlein, J. Mergheim, P. Steinmann, Key Engineering Materials 883 KEM
(2021) 57.
date_created: 2022-03-29T09:08:21Z
date_updated: 2023-01-02T11:50:57Z
department:
- _id: '630'
doi: 10.4028/www.scientific.net/KEM.883.57
language:
- iso: eng
page: '57'
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: Key Engineering Materials
status: public
title: A finite plasticity gradient-damage model for sheet metals during forming and
clinching
type: journal_article
user_id: '14931'
volume: 883 KEM
year: '2021'
...
---
_id: '34208'
abstract:
- lang: eng
text: Computational homogenization is a powerful tool which allows to obtain homogenized
properties of materials on the macroscale from the simulation of the underlying
microstructure. The response of the microstructure is, however, strongly affected
by variations in the microstructure geometry. The effect of geometry variations
is even stronger in cases when the material exhibits plastic deformations. In
this work we study a model of a steel alloy with arbitrary distributed elliptic
voids. We model one single unit cell of the material containing one single void.
The geometry of the void is not precisely known and is modeled as a variable orientation
of an ellipse. Large deformations applied to the unit cell necessitate a finite
elasto-plastic material model. Since the geometry variation is parameterized,
we can utilize the method recently developed for stochastic problems but also
applicable to all types of parametric problems — the isoparametric stochastic
local FEM (SL-FEM). It is an ideal tool for problems with only a few parameters
but strongly nonlinear dependency of the displacement fields on parameters. Simulations
demonstrate a strong effect of parameter variation on the plastic strains and,
thus, substantiate the use of the parametric computational homogenization approach.
author:
- first_name: Dmytro
full_name: Pivovarov, Dmytro
last_name: Pivovarov
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Kai
full_name: Willner, Kai
last_name: Willner
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
citation:
ama: 'Pivovarov D, Mergheim J, Willner K, Steinmann P. Parametric FEM for computational
homogenization of heterogeneous materials with random voids. In: PAMM.
Vol 20. Wiley; 2021. doi:10.1002/pamm.202000071'
apa: Pivovarov, D., Mergheim, J., Willner, K., & Steinmann, P. (2021). Parametric
FEM for computational homogenization of heterogeneous materials with random voids.
PAMM, 20(1). https://doi.org/10.1002/pamm.202000071
bibtex: '@inproceedings{Pivovarov_Mergheim_Willner_Steinmann_2021, title={Parametric
FEM for computational homogenization of heterogeneous materials with random voids},
volume={20}, DOI={10.1002/pamm.202000071},
number={1}, booktitle={PAMM}, publisher={Wiley}, author={Pivovarov, Dmytro and
Mergheim, Julia and Willner, Kai and Steinmann, Paul}, year={2021} }'
chicago: Pivovarov, Dmytro, Julia Mergheim, Kai Willner, and Paul Steinmann. “Parametric
FEM for Computational Homogenization of Heterogeneous Materials with Random Voids.”
In PAMM, Vol. 20. Wiley, 2021. https://doi.org/10.1002/pamm.202000071.
ieee: 'D. Pivovarov, J. Mergheim, K. Willner, and P. Steinmann, “Parametric FEM
for computational homogenization of heterogeneous materials with random voids,”
in PAMM, 2021, vol. 20, no. 1, doi: 10.1002/pamm.202000071.'
mla: Pivovarov, Dmytro, et al. “Parametric FEM for Computational Homogenization
of Heterogeneous Materials with Random Voids.” PAMM, vol. 20, no. 1, Wiley,
2021, doi:10.1002/pamm.202000071.
short: 'D. Pivovarov, J. Mergheim, K. Willner, P. Steinmann, in: PAMM, Wiley, 2021.'
date_created: 2022-12-05T20:45:22Z
date_updated: 2023-01-02T11:52:59Z
department:
- _id: '630'
doi: 10.1002/pamm.202000071
intvolume: ' 20'
issue: '1'
language:
- iso: eng
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: PAMM
publication_identifier:
issn:
- 1617-7061
- 1617-7061
publication_status: published
publisher: Wiley
status: public
title: Parametric FEM for computational homogenization of heterogeneous materials
with random voids
type: conference
user_id: '14931'
volume: 20
year: '2021'
...