Numerical Simulation of Systems of Shear Bands in Ductile Metal with Inclusions

Plohr, JeeYeon N.¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division

关键词: Mathematics;    Material Science;   

DOI  :  10.2172/1304743
RP-ID  :  LA-UR--16-26186
PID  :  OSTI ID: 1304743

学科分类：凝聚态物理

美国|英语

来源: SciTech Connect

【 摘 要 】

These are slides for a presentation on numerical simulation of systems of shear bands in ductile metal with inclusions, performed at Los Alamos National Laboratory. The conclusions are the following: A shear band is much thinner (0.1 ??m) than the spacing between inclusions (100??m). Therefore fully resolved simulation is not feasible; asymptotic analysis allows modeling of a shear band as a velocity discontinuity within a moderately sized cell; formation criterion (critical strain) is determined by rate-dependent viscoplastic flow rule; inclusions cause shear bands to form at smaller strain; under expansion, shear bands form at the same strain than under compression; this can be applied to crystal plasticity.