Molecular dynamics study on size dependence of nano-void growth in single crystal copper
Molecular dynamics simulations using Embedded Atom Method (EAM) potentials on an infinite face-centered cubic crystal containing periodic array of cylindrical voids under uniaxial tension are performed, to study the size dependence of strain-stress response curve and dislocation emission from void free surface. The atomistic calculation shows the larger matrix has the lower yield stress and the critical stress for dislocation emission decreased when increasing the void size, and phase transformation is induced near the void free surface. This size dependence can not be derived from the continuum modeling and is expected to provide some helpful insights on understanding the damage mechanism at micro scale. The simulation process in this work is performed by using Large-scale Atomic/Molecular Massively Parallel simulator (LAMMPS) developed by Steve Plimpton and co-workers.
molecular dynamics simulation void growth size dependence
Kejie Zhao Changqing Chen
MOE Key Laboratory for Strength and Vibration, School of Aerospace,XianJiaotong University, Xian, 710049, P.R. China
国际会议
杭州
英文
446-460
2007-04-01（万方平台首次上网日期，不代表论文的发表时间）