Konferenzbeiträge / Conferences

2019

Dunlap, A., Hering, O., Aretz, A., Schwedt, A., Tekkaya, A. E., 2019. Quantification of forming induced ductile damage using automated EDX particle analysis in SEM. In: Proceedings of Damage Assessment of Structures (DAMAS), Porto, Portugal.

Fohrmeister, V., Díaz, G., Mosler, J., 2019. On the implementation of rate-independent gradient-enhanced crystal plasticity theory. In: Proceedings of 90th Annual Meeting of GAMM, München, Germany.

Guhr, F., Barthold, F.-J., 2019. Damage Reduced Air Bending Utilizing Load Optimization. In: Proceedings of 13th World Congress of Structural and Multidisciplinary Optimization, Peking, China.

Guhr, F., Barthold F.-J., Meya, R., Tekkaya, A. E., 2019. Load optimization for air bending in the context of damage reduction. In: Proceedings of GAMM 2019, Vienna, Austria.

Imran, M., Afzal, M. J., Bambach, M., 2019. Analysis of competition between onset of dynamic recrystallization and damage nucleation during hot forming. In: Proceedings of 13rd NUMIFORM 2019, Portsmouth, New Hampshire, USA.

Imran M., Szyndler J., Afzal M. J., Bambach M., 2019. Towards the damage evaluation for hot forming process using Gurson-Tvergaard-Needleman – coupled to dynamic recrystallization. In: Proceedings of 22nd ESAFORM 2019, Vitoria-Gasteiz, Spain.

Langenfeld, K., Möhring, K., Walther, F., Mosler, J., 2019. Regularizational approach for modeling ductile damage. In: Proceedings of 12th international conference on multiaxial fatigue and fracture, ICMFF12, Bordeaux, France.

Langenfeld, K., Möhring, K., Walther, F., Mosler, J., 2019. On the regularization for ductile damage models. In: Proceedings in Applied Mathematics and Mechanics 19.

Liebsch C., Li X., Lohmar J., Hirt G., 2019. Influence of process conditions and pore morphology on the closure rate of pores in hot rolling of steel. In: Proceedings of the 13th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM, Portsmouth, New Hampshire, USA.

Münstermann, S., Sparrer, Y., Yao, Y., Lian, J., Meya, R., Clausmeyer, T., Tekkaya, A. E., 2019. Effect of plastic strain and ductile damage on elastic modulus of multiphase steel and its impact on springback prediction. In: Proceedings of the 22nd edition of the International ESAFORM Conference on Material Forming, Vitoria-Gasteiz, Spain.

Nick, M., Mannens, R., Trauth, D., Bergs, T., 2019. Load path modelling in single-step deep drawing of rotationally symmetric cups. In: Proceedings of 18th International Conference on Sheet Metal, Leuven, Belgium.

Pütz, F., Tixier, A., Könemann, M., Lian, J., Münstermann, S., 2019. Unterschiede in der Mikrostruktur von Dualphasenstählen und deren Einfluss auf die Materialeigenschaften. In: Tagungsband der 51. Tagung des DVM-Arbeitskreis Bruchmechanik und Bauteilsicherheit, Aachen, Germany.

Schowtjak, A., Kusche, C., Meya, R., Korte-Kerzel, S., Al-Samman, T., Tekkaya, A.E, Clausmeyer, T., 2019. Prediction of void evolution in sheet bending based on statistically representative microstructural data for the Gurson-Tvergaard-Needleman model. In: Proceedings of the 13th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM, Portsmouth, New Hampshire, USA.

Sprave, L., Menzel, A., 2019. Parameter identification of DP800 based on a gradient-enhanced ductile damage model at finite strains. In: Proceedings of 6th International Conference on Material Modelling.

 

2018

Bergs, T., Nick, M., Feuerhack, A., Trauth, D., Klocke, F., 2018. Numerical-experimental Investigation of Load Paths in DP800 Dual Phase Steel During Nakajima Test. In: Proceedings of the 25th International ESAFORM Conference on Material Forming, Palermo, Italy, DOI: 10.1063/1.5035047.

Bergs, T., Nick, M., Trauth, D., Klocke, F., 2018. Damage Evolution in Nakajima Tests of DP800 Dual Phase Steel. In: Proceedings of the 37th International Deep-Drawing Research Group Conference, Waterloo, Canada, DOI: 10.1088/1757-899X/418/1/012048.

Dunlap, A., Hering, O., Aretz, A., Schwedt, A., Tekkaya, A. E., 2018. Microscale study of forming induced physical mechanisms in 16MnCrS5 steel. In: Proceedings of Material Science and Engineering Congress, MSE 2018, Darmstadt, Germany.

Dunlap, A., Hering, O., Aretz, A., Schwedt, A., Tekkaya A. E., 2018. Electron microscopic investigation of forming induced damage evolution in 16MnCrS5 steel. In: Proceedings of the 7th International Conference on Fatigue Fracture and Wear (FFW), Gent, Belgium, (Digital).

Fohrmeister, V., Díaz, G., Mosler, J., 2018. A strong discontinuity approach to crystal plasticity theory. In: Proceedings in Applied Mathematics 18 (1), DOI: 10.1002/pamm.201800295.

Fohrmeister, V., Mosler, J., 2018. Numerically efficient implementation of rate-independent (gradient enhanced) crystal plasticity. In: Proceedings of 6th European Conference on Computational Mechanics, ECCM 6, Glasgow, UK.

Guhr, F., Barthold, F.-J., Menzel, A., Sprave, L., Liedmann, J., 2018. Shape Optimization for Damage Control. Proceedings of 6th European Conference on Computational Mechanics 7th. European Conference on Computational Fluid Dynamics, Glasgow, UK

Guhr, F., Barthold, F.-J., Menzel, A., Sprave, L., Liedmann, J., 2018. Sensitivity Analysis of a Non-Local, Gradient Enhanced Damage Model. In:  Proceedings in Mathematics and Mechanics 18 (1), DOI: 10.1002/pamm.201800147.

Heitbreder, T., Ottosen, N. S., Ristinmaa, M., Mosler, J., 2018. Investigation of size effects due to material interfaces. In: Proceedings in Applied Mathematics and Mechanics 18 (1), DOI: 10.1002/pamm.201800072.

Hering O., Dahnke, C., Tekkaya, A.E., 2018. Influence of Damage on the Properties of Cold Forged Parts. In: Proceedings of 51st ICFG Plenary Meeting, Columbus, USA, pp. 137-144.

Hering, O., Dahnke, C., Tekkaya, A. E., 2018. Influencing the Evolution of Damage in Cold Forging. In: Proceedings of 8th International Seminar on Precision Forging, Nagoya, Japan (Digital).

Imran, M., Bambach, M., 2018. Towards the damage evaluation using Gurson-Tvergaard-Needleman (GTN) model for hot forming processes. In: AIP Conference Proceedings 1960, 150017, DOI: 10.1063/1.5035063.

Klinge, S., Aygün, S., Bambach, M., 2018. Extended simulations of the roll bonding process. Proceedings in Applied Mathematics and Mechanics 18 (1), DOI: 10.1002/pamm.201800257.

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

Kusche, C. F., Freund, M., Reclik, T., Kerzel, U., Al-Samman, T., Korte-Kerzel, S., 2018. Statistical in-situ analysis of ductile damage mechanisms in DP800 Dual-Phase Steel. In: Proceedings of International Symposium Nano and Micro Scale Damage in Metals, Utrecht, Netherlands.

Langenfeld, K., Junker, P., Mosler, J., 2018. Rate-Dependent Regularization for Material Softening. In: Proceedings of the 10th European Solid Mechanics Conference, Bologna, Italy.

Langenfeld, K., Junker, P., Mosler, J., 2018. On the rate-dependent regularization for damage modeling. In: Proceedings in Applied Mathematics und Mechanics 18 (1), DOI: 10.1002/pamm.201800058.

Liebsch C., Hirt G., 2018. Numerical investigation on damage evolution and void closure in hot flat rolling. In: Proceedings of the 11th Forming Technology Forum 2018, Zurich, Switzerland, pp. 101-107.

Liedmann, J., Barthold, F.-J., 2018. Sensitivity Analysis of Elastoplastic Structural Response Regarding Geometry and External Loads. Proceedings of the 6th. European Conference on Computational Mechanics 7th. European Conference on Computational Fluid Dynamics, Glasgow, UK

Meya, R., Löbbe, C., Tekkaya, A. E., 2018. Stress State Control by a Novel Bending Process and its Effect on Damage Evolution. In: Proceedings of the 13th Manufacturing Science and Engineering Conference, College Station, USA, DOI: 10.1115/MSEC2018-6349.

Münstermann, S., Pütz, F., Könemann, M., Brinnel, V., Lian, J., 2018. Schädigungsmechanismen in mehrphasigen Karosseriestählen. In: Tagungsband der 50. Tagung des DVM-Arbeitskreises Bruchmechanik und Bauteilsicherheit, Paderborn.

Ostwald, R., Clausmeyer, T., Schulte, R., Schowtjak, A., 2018. Towards the simulation of complex metal forming processes: combination of regularized damage and contact. In: Proceedings of DVM-Seminar, Dortmund, Germany.

Ostwald, R., Kuhl, E., Menzel, A., 2018. A computational framework for the simulation of regularized damage. In: Proceedings of Materials Science and Engineering, MSE 2018, Darmstadt, Germany.

Ostwald, R., Kuhl, E., Menzel, A., 2018. Implementation of a gradient-enhanced damage model – a heat equation-based framework. In: Proceedings of the 6th European Conference on Computational Mechanics, ECCM 6, Glasgow, Scotland.

Pütz, F., Könemann, M., Lian, J., Münstermann, S., 2018. Einfluss der Materialschädigung auf die Kantenrissempfindlichkeit von Dualphasenstählen. In: Tagungsband DVM-Arbeitskreis Bruchmechanik und Bauteilsicherheit, Paderborn, Deutschland, pp. 49-59.

Samfaß, L., Walther, F., 2018. Einfluss umformtechnisch induzierter Schädigung auf das Ermüdungsverhalten und die magnetischen Werkstoffeigenschaften des Stahls 16MnCrS5. In: Tagungsband Werkstoffprüfung 2018 – Werkstoffe und Bauteile auf dem Prüfstand, Hrsg: G. Moninger, Stahleisen, Düsseldorf, Germany, pp. 39-44.

Samfaß, L., Walther, F., 2018. The Effect of forming-induced damage on fatigue properties of 16MnCrS5 steels. In: Proceedings of Materials Science and Engineering, MSE 2018, Darmstadt, Deutschland

Schowtjak, A., Kusche, C., Clausmeyer, T., Al-Samman, T., Korte-Kerzel, S., 2018. Identification of GTN model parameters by macroscopic and microscopic approaches. In: Proceedings of Materials Science and Engineering, MSE 2018, Darmstadt, Germany.

Sprave, L., Menzel, A., 2018. Towards verification of a gradient-enhanced ductile damage model. In: Proceedings of 41st Solid Mechanics Conference, Warsaw, Poland, Digital.

Sprave, L., Menzel, A., 2018. Gradient-enhanced ductile damage – a finite deformation framework with application to DP800. In: Proceedings in Applied Mathematics and Mechanics 18 (1), DOI:10.1002/pamm.201800232.

Tekkaya A. E., Schowtjak A., Clausmeyer T., 2018. Damage in Metal Forming. In: Proceedings of the 8th International Seminar on Precision Forging, ISPF, Nagoya, Japan, pp. 21-26.

Tekkaya, A. E., Yin, Q., Traphöner, H., Meya, R., Hering, O., Kolpak, F., Wernicke, S., Heibel, S. Clausmeyer, T., 2018. Advanced Applications of Experimental Mechanics in Metal Forming. In: Proceedings of the 18th International Conference on Experimental Mechanics (ICEM 2018), Brussels, Belgium.

Wang, S., Pöplau, J., Grüber M., Hirt G., 2018. Finite element analysis of caliber rolling process to investigate possibilities to influence the damage evolution. In: Proceedings of FTF 2018, Zurich, Switzerland, pp. 108-112.

 

2017

Bambach, M., Klinge S., 2017. Consistency of dynamic recrystallization models from the perspective of physical metallurgy and continuum mechanics. Proceedings in Applied Mathematics and Mechanics 17, pp. 395 – 396, DOI: 10.1002/pamm.201710167.

Barthold, F.-J., Liedmann, J., 2017. Remarks on Variational Sensitivity Analysis of Elastoplastic Deformations. In: AIP Conference Proceedings 1896, 100007, DOI: 10.1063/1.5008125.

Fohrmeister, V., Bartels, A., Mosler J., 2017. Variational constitutive updates based on hyper-dual numbers – theory of gradient enhanced thermoplasticity. In: Proceedings of GACM Colloquium on Computational Mechanics, Stuttgart, Germany, Digital.

Fohrmeister, V., Bartels, A., Mosler J., 2017. A generic variational constitutive update based on hyper-dual numbers: Application to thermomechanical gradient enhanced plasticity. In: Joint Annual Meeting of GAMM, Proceedings in Applied Mathematics and Mechanics 17 (1)

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

Hojda, S., Sturm, K. J. X., Teller, M., Hirt, G., 2017. Remeshing framework for a multiphysics FEM solver exemplified by a damage sensitive extrusion process. In: Proceedings of the 37th SENAFOR, Porto Alegre/RS, Brazil (Digital).

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

Liedmann, J., Barthold, F.-J., 2017. Design Exploration based upon Internal Structure of Materially Nonlinear Response Sensitivities. In: Proceedings of 12th World Congress of Structural and Multidisciplinary Optimization, Braunschweig, Germany, DOI: 10.1007/978-3-319-67988-4.

Meya, R., Löbbe, C., Tekkaya, A. E., 2017. New bending process with superposition of radial stresses for damage control. In: Proceedings of the 10th Forming Technology Forum, Enschede, Netherlands (Digital).

Münstermann, S., Lian, J., Pütz, F., Könemann, M., Brinnel, V., 2017. Comparative Study on Damage Evolution during Sheet Metal Forming of Steels DP600 and DP1000. In: Proceedings of the 36th IDDRG Conference, Munich, Germany (Digital).

Schowtjak, A., Clausmeyer, T., Tekkaya, A. E., 2017. Analysis of Damage and Fracture Formulations in Cold Extrusion. In: Proceedings of XIV International Conference on Computational Plasticity, COMPLAS 2017, Barcelona, Spain (Digital).

Sprave, L., Menzel, A., 2017. Regularisation of gradient-enhanced damage coupled to Finite Plasticity. In: Proceedings of the 7th GACM Colloquium on Computational Mechanics, pp. 769-772, DOI: 10.18419/opus-9334.

Sprave, L., Menzel, A., 2017. A Multisurface Model for Gradient-Enhanced Damage Coupled to Finite Plasticity. In: Proceedings in Applied Mathematics and Mechanics, 17 (1), pp. 465-466, DOI: 10.1002/pamm.201710202.

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