Surface eigen-displacement and surface Poisson’s ratios of solids
Surface eigen-displacement and surface Poisson’s ratios of solids
复制标题
DOI：
10.1016/j.actamat.2011.03.067
复制
发表时间：
2011-06
期刊：
影响因子：
9.4
通讯作者：
Tong-Yi Zhang;Hang Ren;Zhi-Jia Wang;Sheng Sun
中科院分区：
文献类型：
--
作者：
Tong-Yi Zhang;Hang Ren;Zhi-Jia Wang;Sheng Sun
通过理论分析和分子动力学模拟，系统地研究了固体表面本征位移和表面泊松比对表面能、表面应变和表面应力的影响。以面心立方（0 0 1）Au薄膜为例说明了其物理图象。表面本征位移是正常松弛后平衡状态下的临界表面应变，因此是固有的表面性质。表面泊松比也是固有的表面性质。将表面本征位移、表面泊松比与表面本征应力、表面切向弹性常数相结合，是固体表面弹性力学的基础。
Theoretical analysis and molecular dynamics simulations were conducted to study systematically surface eigen-displacement and surface Poisson’s ratios of solids, which play essential roles in surface energy, surface strain and surface stress. Face-centered cubic (0 0 1) Au thin films were taken as typical examples to illustrate the physical picture. The surface eigen-displacement is a critical surface strain at the equilibrium state after normal relaxation and thus an intrinsic surface property. Surface Poisson’s ratios are also intrinsic surface properties. Combining surface eigen-displacement and surface Poisson’s ratios with surface eigen-stress and surface tangential elastic constants lays foundations of surface elasticity of solids.