DEVELOPING MULTI-SCALE MODEL TO STUDY ATYPICAL CRYSTAL PLASTIC BEHAVIOR

摘要：

To study atypical plasticity behaviors for singlecrystals at submicron-to-nanometer scales,a threedimensional discrete dislocation dynamics (3D-DDD) model coupled with finite element method (FEM) is developed.With this new formulation,3D discrete dislocation plasticity is completely handled under a continuum mechanics framework.It has a competitive advantage in solving large and nonlinear deformation problems by communicating deformation variables between DDD and FEM.As an application,an uniaxial compression test for Cu micro-pillars is simulated to investigate the process of dislocation propagating,starvation hardening and the effect of boundary conditions.

关键词： discrete dislocation dynamics continuum mechanics multi-scale computation single crystal plasticity

作者: Y.N.Cui Y.Gao Z.L.Liu Z.Zhuang

作者单位: Applied Mechanics Lab.,School of Aerospace,Tsinghua University,Beijing 100084 China

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 730-737

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）