Rate effect and coupled evolution of atomic motions and potential landscapes
Pan Xiao1, Jun Wang1, Rong Yang1, Fu-Jiu Ke2, Meng-Fen Xia1, Yi-Long Bai1
1. State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China;
2. School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing, China
Since rate effect of materials plays a key role in impact engineering, the microscopic mechanism of rate effect is investigated at molecular level in this paper. The results show that rate effect on the strength of atomic system is closely related to the coupled evolution of atomic motions and potential landscapes. Accordingly, it becomes possible to develop a new algorithm of molecular simulation, which could properly and efficiently demonstrate strain rate effect under a wide range of loading rates and unveil the mechanisms underlying the strain rate effects.
Fund:The project was supported by the National Basic Research Program of China (973 Program) (2012CB937500), the National Natural Science Foundation of China (11202212, 10932011, 11021262, 11172024, 11172305, and 11232013).
Corresponding Authors:
Yi-Long Bai
E-mail: baiyl@lnm.imech.ac.cn
Cite this article:
Pan Xiao,Jun Wang,Rong Yang et al. Rate effect and coupled evolution of atomic motions and potential landscapes[J]. Acta Mechanica Sinica, 2013, 29(5): 676-681.
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