A damping boundary condition for atomistic-continuum coupling

被引：2

作者：

Zhang, Jie ^{[1
]}

Tieu, Kiet ^{[1
]}

Michal, Guillaume ^{[1
]}

Zhu, Hongtao ^{[1
]}

Zhang, Liang ^{[1
]}

Su, Lihong ^{[1
]}

Deng, Guanyu ^{[1
,2
]}

Wang, Hui ^{[1
]}

机构：

[1] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

[2] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

来源：

CHINESE PHYSICS B | 2017年 / 26卷 / 06期

基金：

日本学术振兴会;

关键词：

multiscale modeling; spurious wave reflection; coarse-fine decomposition; nonlinear damping; 3D MULTISCALE APPROACH; BRIDGING SCALE; MOLECULAR-DYNAMICS; SIMULATIONS; SOLIDS;

D O I：

10.1088/1674-1056/26/6/068702

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The minimization of spurious wave reflection is a challenge in multiscale coupling due to the difference of spatial resolution between atomistic and continuum regions. In this study, a new damping condition is presented for eliminating spurious wave reflection at the interface between atomistic and continuum regions. This damping method starts by a coarse-fine decomposition of the atomic velocity based on the bridging scale method. The fine scale velocity of the atoms in the damping region is reduced by applying nonlinear damping coefficients. The effectiveness of this damping method is verified by one-and two-dimensional simulations.

引用

页数：8

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