论文部分内容阅读
The dynamic behavior of single crystalline copper as well as the structural features of dislocations under shock loading are investigated by a multiscale model that couples discrete dislocation dynamics with finite element analyses (DDD-FE).Since homogeneous nucleation of dislocations takes place of the Frank-Read sources and serves as the dominant dislocation generation mechanism at extremely high strain rates,systematic molecular dynamics (MD) sim-ulations are carried out to provide the parameters of homogenous nucleation regime for the DDD-FE calculations.