Multiscale Dislocation Dynamics Modeling of the High Strain Rate Deformation in Copper Single Crystal under Cyclic, Monotonic, & Shock Loading

Understanding the material behavior under various loadings  provides  the required knowledge for material selection in order to properly  design components and machines. The material behavior at high strain  rates for copper single crystals under cyclic, monotonic, and shock loading is investigated. The work is divided into two parts: Modeling  the Low Cycle Fatigue in Copper Single Crystal, and Investigating  Strain Rate Effect on Copper Single Crystals. Multiscale dislocation  dynamics plasticity (MDDP) model is used to investigate the evolution  of dislocation microstructure in copper single crystals subjected to  low cycle fatigue loading and study the material hardening due to  fatigue. In addition, MDDP is used to study the effect of strain rate  on the behavior of copper single crystals subjected to uniaxial  monotonic and shock loading especially its effect on the stress.