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Wednesday, September 30, 2015
10:30 AM - 11:30 AM
CNLS Conference Room (TA-3, Bldg 1690)

Seminar

Modeling the mesoscopic and macroscopic deformation behavior of a deep drawing DC04 steel

Van Tung Phan
National University of Singapore

Metal forming processes such as bulge and stretch forming as well as deep drawing are required for the manufacturing of automotive parts and steel sheet panels. In this contribution, a non-alloyed steel (DC04) is investigated numerically on the meso and the macro scale. In a first step, macro tensile tests are used to estimate the material parameters using large strain single crystal and polycrystal plasticity models. Two-dimensional electron backscatter diffraction (EBSD) data are discretized by finite elements and subjected to homogeneous displacement boundary conditions for grain scale simulations in the second step. In the third step, a two-scale Taylor type model is applied at the integration points of the finite elements to simulate a deep drawing process based on the experimental crystallographic texture data. The texture data required for the specification of the two-scale polycrystal model are determined by using two methodically different methods. Finally, a formability prediction based on the aforementioned two-scale model is analyzed by applying two classical localization criteria for different strain paths.

Host: DJ Lusher