Investigating the limits of polycrystal plasticity modeling
作者： T BUCHHEIT
DOI: 10.1016/J.IJPLAS.2003.10.009
关键词: Plasticity 、 Mechanics 、 Deformation (meteorology) 、 Texture (geology) 、 Characteristic length 、 Scale (ratio) 、 Engineering drawing 、 Quasistatic process 、 Materials science 、 Grain boundary 、 Finite element method
摘要: Abstract A material model which describes the rate-dependent crystallographic slip of FCC metals has been implemented into a quasistatic, large deformation, nonlinear finite element code developed at Sandia National Laboratories. The resultant microstructure based elastic–plastic deformation successfully performed simulations realistic looking 3-D polycrystalline microstructures generated using Potts-model approach. These have as 50,000 elements composed 200 randomly oriented grains. This type tracks grain orientation and predicts evolution sub-grains on an by basis during polycrystal. Simulations this generate body informative results, but they shortcomings. paper attempts to examine detailed results provided scale highly resolved polycrystal plasticity modeling through series analyses. analyses are designed isolate issues such rate texture evolution, effect mesh refinement comparison with experimental data. Specific limitations can be identified lack characteristic length oversimplified boundaries within framework.
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