In this paper, intermediate modeling of polycrystalline plasticity is proposed for rigid viscoplatic large deformations. This approach is based on the use of a bicrystal as the elementary local element representing the polycrystal. The local homogenization is obtained by considering the bicrystal volume-averaging and the jump conditions at the assumed planar interface between the two crystals. Two interaction laws based on Taylor and Sachs type assumptions are proposed. These bicrystal-based averaging schemes are different from the classical Taylor and Sachs models since they allow for stresses and strains to vary from one single crystal to the other. We simulate uniaxial tension and compression as well as plane strain compression tests. Results in terms of stress-strain curves are shown in comparison to those of the pure Taylor and Sachs models. We also show results for texture evolution and discuss their comparison with the experimental measurements.
Bicrystal-Based Modeling of Plasticity in FCC Metals
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division January 2, 2001; revised manuscript received June 21, 2001. Guest Editors: Mohammed Cherkaoui and La´szlo´ S. To´th.
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Lee, B. J., Ahzi, S., and Parks, D. M. (June 21, 2001). "Bicrystal-Based Modeling of Plasticity in FCC Metals ." ASME. J. Eng. Mater. Technol. January 2002; 124(1): 27–40. https://doi.org/10.1115/1.1420196
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