Molecular Dynamic Modeling of Plasticity of al and Al-Cu Alloys Under Dynamic Loading
Abstract
The molecular dynamic (MD) simulations presented are devoted to the study of mechanisms and kinetics of shock-induced plasticity of Al and its alloy with Cu. Dislocation velocities as functions of applied shear stress are calculated in a wide temperature range up to melting point. Dislocation interaction with nanosize obstacles is considered. The critical resolved shear stress necessary for a dislocation to penetrate through an obstacle is determined. The results are used to characterize the effect of temperature on the dynamic yield stress in perfect crystals and crystals with nano-sized obstacles.
- Publication:
-
Shock Compression of Condensed Matter 2009
- Pub Date:
- December 2009
- DOI:
- 10.1063/1.3295257
- Bibcode:
- 2009AIPC.1195..781S
- Keywords:
-
- plasticity;
- shear strength;
- molecular dynamics method;
- 62.20.F-;
- 83.10.-y;
- 31.15.xv;
- Deformation and plasticity;
- Fundamentals and theoretical;
- Molecular dynamics and other numerical methods