晶体塑性理论及模拟研究进展

Progress of crystal plasticity theory and simulations

回顾了大变形晶体塑性理论的发展历程、本构模型和均匀化方法,综述了晶体塑性理论成果和典型应用场合。从流动模型、加工硬化模型和状态变量演化的角度对比分析了唯象的和基于物理机理的晶体塑性模型的理论基础和优缺点;阐述了平均场晶体塑性模型和全场晶体塑性模型的特点和适用场合;从金属多晶体材料的各向异性、织构演化、非均匀塑性变形、可成形性、尺度效应、损伤断裂行为、热变形和微观组织演化、虚拟测试等角度介绍了晶体塑性模拟的典型应用场合,并展望了该领域的未来发展趋势。

The development history,constitutive models,and homogenization schemes of crystal plasticity theory with large deformation were reviewed. Several theoretical achievements and typical applications of crystal plasticity were outlined. The theories basis,advantages and disadvantages of both phenomenological and physically based crystal plasticity models were compared and analyzed in terms of flow models,work hardening models,and the evolution of state variables. The characteristics and applications of both mean-field and full-field crystal plasticity models were illustrated. The typical applications of crystal plasticity simulations were introduced from the aspects of anisotropy,texture evolution,non-uniform plastic deformation,formability,size effect,damage and fracture behavior,hot deformation and microstructure evolution,and virtual testing etc. And future development trends in this field were pointed out.