Zeitschriftenbeiträge

2018

K. Langenfeld, P. Junker, J. Mosler
Quasi-brittle damage modeling based on incremental energy-relaxation combined with a viscous-type regularization.
Continuum Mechanics and Thermodynamics, doi: 10.1007/s00161-018-0669-z

R. Ostwald, E. Kuhl, A. Menzel
Damage regularisation using the heat equation – a user element-free Abaqus implementation
Computer Methods in Applied Mechanics and Engineering

R. Meya, C. Löbbe, O. Hering, A. E. Tekkaya
Bleche Biegen unter Radialer Druckspannungsüberlagerung.
Umformtechnik Blech Rohre Profile, März 2018

 

2017

A. E. Tekkaya, N. Ben Khalifa, O. Hering, R. Meya, S. Myslicki, F. Walther
Forming-induced damage and its effects on product properties.
CIRP Annals - Manufacturing Technology 66 (2017) 281-284
http://dx.doi.org/10.1016/j.cirp.2017.04.113

M. Bambach, S. Klinge
Consistency of dynamic recrystallization models from the perspective of physical metallurgy and continuum mechanics.
Proc. Appl. Math. Mech. 17, 395 – 396

L. Sprave, A. Menzel
A multisurface model for gradient-enhanced damage coupled to finite plasticity
Joint Annual Meeting of GAMM, TU Ilmenau und Bauhaus Universität Weimar, 06.-10.03.2017
Proceedings in Applied Mathematics and Mechanics, 17, 1, 465-466, 2017

T. Heitbreder, N. S. Ottosen, M. Ristinmaa, J. Mosler
Consistent elastoplastic cohesive zone model at finite deformations - Variational formulation
IJSolStr, Feb. 2017

 

Konferenzbeiträge

2018

R. Meya, C. Löbbe, A. E. Tekkaya
Stress state control by a novel bending process and its effect on damage evolution.
MSEC 2018, College Station, Texas, USA

Samfaß, L.; Walther, F.:
Effect of forming-induced damage on fatigue properties of 16MnCrS5 steels
MSE 2018, Texas, USA

V. Fohrmeister, J. Mosler
Gradient enhanced crystal-plasticity theory.
ECCM 6, Glasgow, 11.-15.06.18

M. Nick, T. Bergs, D. Trauth, F. Klocke
Damage Evolution in Nakajima Tests of DP800 Dual Phase Steel.
IDDRG Conference, 03.-07.06.2018, Waterloo, Kanada

R. Ostwald, E. Kuhl, A. Menzel
Implementation of a gradient-enhanced damage model – a heat equation-based framework.
6th European Conference on Computational Mechanics (ECCM 6), Glasgow, UK (2018)

M. Nick, A. Feuerhack, D. Trauth, F. Klocke
Numerical-experimental Investigation Of Load Paths in DP800 Dual Phase Steel During Nakajima Test.
ESAFORM, 23.-25.04.2018, Palermo, Italien

M. Imran, M. Bambach
Towards the damage evaluation using Gurson-Tvergaard-Needleman (GTN) model for hot forming processes.
21st ESAFORM 2018, 23-25 April 2018, Palermo, Italy

V. Fohrmeister, G. Díaz, J. Mosler
A strong discontinuity approach to crystal plasticity theory
Annual Meeting of GAMM, TU München, 19.-23.03.18

S. Klinge, S. Aygün, M. Bambach
Continuum-mechanical aspects of modeling the dislocation motion including the effects of chemical impurities.
GAMM 2018

F. Guhr, F.-J. Barthold, A. Menzel, L. Sprave, J. Liedmann
Sensitivity Analysis of a Non-Local, Gradient Enhanced Damage Model.
89th GAMM Annual Meeting,19-23 March 2018, Munich

L. Sprave, A. Menzel
Gradient-enhanced ductile damage – a finite deformation framework with application to DP800.
Joint Annual Meeting of GAMM, TU Munich, 19.-23.03.2018

K. Langenfeld, P. Junker, J. Mosler
On the rate-dependent regularization for damage modeling.
89th GAMM Annual Meeting, 19-23. März 2018, München

T. Reclik, C. F. Kusche, U. Kerzel, T. Al-Samman, S. Korte-Kerzel
Damage Classification in DP Steel Using Neural Networks.
DPG Frühjahrstagung Berlin, 8. März 2018

O. Hering,  C. Dahnke, A. E. Tekkaya
Influencing the Evolution of Damage in Cold Forging.
8th International Seminar on Precision Forging 2018, 5-8 March 2018, Nagoya, Japan

A. Schowtjak, T. Clausmeyer, A. E. Tekkaya
Damage in Metal Forming.
8th JSTP International Seminar on Precision Forging (8th ISPF), 5 March 2018, Nagoya, Japan

C. F. Kusche, M. Freund, T. Reclik, U. Kerzel, T. Al-Samman, S. Korte-Kerzel
Damage in DP Steel - statistical in-situ analysis of brittle and ductile mechanisms prior to the onset of fracture.
DPG Frühjahrtagung, Berlin, 5. März 2018

F. Pütz, M. Könemann, J. Lian, S. Münstermann
Einfluss der Materialschädigung auf die Kantenrissempfindlichkeit von Dualphasenstählen
50. Tagung des DVM-Arbeitskreises Bruchmechanik und Bauteilsicherheit Paderborn 20.02.2018

S. Münstermann, F. Pütz, M. Könemann, V. Brinnel, J. Lian
Schädigungsmechanismen in mehrphasigen Karosseriestählen.
50. Tagung des DVM-Arbeitskreises Bruchmechanik und Bauteilsicherheit Paderborn 20.02.2018

C. F. Kusche, M. Freund, T. Reclik, U. Kerzel, T. Al-Samman, S. Korte-Kerzel
Statistical in-situ analysis of ductile damage mechanisms in DP800 dual-phase steel
International Symposium Nano and Micro Scale Damage in Metals, Utrecht, 7. – 9. Februar 2018

 

2017

R. Meya, C. Löbbe, O. Hering, A. E. Tekkaya
New bending process with superposition of radial stresses for damage control.
10th Forming Technology Forum 2017, 12-13 October 2017, Enschede, The Netherlands

V. Fohrmeister, A. Bartels, J. Mosler
Variational constitutive updates based on hyper-dual numbers - theory of gradient enhanced thermoplasticity
GACM Colloquium on Computational Mechanics, University of Stuttgart, 11.-13.10.17

A. Hojda, K.J.X. Sturm, M.Teller, G. Hirt
Remeshing Framework for a multiphysics FEM solver exemplified by a damage sensitive Extrusion process.
37th SENAFOR, 4-6 October 2017, Porto Alegre/RS, Brasil

S. Hojda, K. J.X. Sturm, M. Terhorst, F. Klocke, G. Hirt
Damage dependent material properties in a Finite Element Simulation of a hybrid Forward Extrusion process.
International Conference on the Technology of Plasticity, ICTP 2017, 17-22 September 2017, Cambridge, United Kingdom

A. Schowtjak, T. Clausmeyer, A. E. Tekkaya
Analysis of Damage and Fracture Formulations in Cold Extrusion.
XIV International Conference on Computational Plasticity, COMPLAS 2017, 5-7 September 2017, Barcelona, Spain

A. E. Tekkaya, N. Ben Khalifa, O. Hering, R. Meya, S. Myslicki, F. Walther
Forming-induced damage and its effects on product properties.
67th CIRP General Assembly 2017, 22 August 2017, Lugano, Switzerland

S. Münstermann, J. Lian, F. Pütz, M. Könemann, V. Brinnel
Comparative Study on Damage Evolution during Sheet Metal Forming of Steels DP600 and DP1000.
36th IDDRG Conference - Materials Modelling and Testing for Sheet Metal Forming, 2-6 July 2017, Munich, Germany

J. Liedmann, F.-J. Barthold
Design Exploration based upon Internal Structure of Materially Nonlinear Response Sensitivities.
12th World Congress of Structural and Multidisciplinary Optimisation, 5 - 9 June 2017, Braunschweig, Germany

F.-J. Barthold, J. Liedmann
Remarks on Variational Sensitivity Analysis of Elastoplastic Deformations.
20th International ESAFORM Conference on Material Forming, 26 - 28 April 2017, Dublin, Ireland

T. Heitbreder, N. S. Ottosen, M. Ristinmaa, J. Mosler
On damage modeling of material interfaces: Numerical implementation and computational homogenization.
CMAME, März 2017

V. Fohrmeister, A. Bartels, J. Mosler
A generic variational constitutive update based on hyper-dual numbers: Application to ther-momechanical gradient enhanced plasticity
Annual Meeting of GAMM, TU Ilmenau/Bauhaus Universität Weimar, 06.-10.03.2017

 

Vorträge

2017
A.E. Tekkaya
Damage in metal forming (with special focus on cold extrusion).
ICFG 50th Plenary Meeting, 03.-06.09.2017, Shanghai, China

N. Ben Khalifa, A. E. Tekkaya
Schädigungskontrollierte Umformprozesse.
Werkstoffwoche, 27.-29.09.2017, Dresden, Germany

R. Ostwald
A regularized damage formulation for the application in commercial finite element codes
Invited Talk, Stanford University, E. Kuhl Seminar (2017)

 

Patente

2017
Meya, R., Löbbe, C., Tekkaya, A. E.
Vorrichtung zum Blechbiegen mittels gezielter Spannungsüberlagerung
Patentanmeldung, DE 10 2017 006 218.8 (2017)

 

Gastvorträge

-

 

Downloads

Flyer „Kurzüberblick TRR 188“, deutsch  Download

Flyer „Kurzüberblick TRR 188“, englisch  Download