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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Algorithm Development in Materials Science and Engineering
Presentation Title Novel Multi-scale Plasticity Modeling Using Defect Dynamics Element Method (DDEM)
Author(s) Nicole K. Aragon, Dongchan Jang, Hojun Lim, Ill Ryu
On-Site Speaker (Planned) Nicole K. Aragon
Abstract Scope A multi-scale modeling technique has been developed by coupling dislocation dynamics (DD) and finite element modeling, known as the defect dynamics element method (DDEM). In this coupled model, the DD framework tracks the evolution of the dislocation microstructure, while the stress field with the given plastic strain field from DD is calculated in the finite element model. In this talk, applications of DDEM will be presented with the aim of correlating the defect microstructure characteristics and the macroscopic material behavior under quasi-static and dynamic loading conditions. Micro-bending simulation results of single crystalline and bicrystalline copper microbeams show good agreement with performed experiments. For the Taylor impact test with significant temperature and strain rate gradients, DDEM simulations of single crystalline tantalum predict a similar anisotropic response to that observed in previous experimental findings. This framework enables robust multi-scale plasticity modeling for complex loading and boundary conditions as well as multi-physical phenomena.
Proceedings Inclusion? Planned:

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