THE ATOMIC STRAIN TENSOR
THE ATOMIC STRAIN TENSOR
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DOI：
10.1016/0021-9991(92)90048-4
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发表时间：
1992-07-01
影响因子：
4.1
通讯作者：
SUTER, UW
中科院分区：
文献类型：
--
作者：
MOTT, PH;ARGON, AS;SUTER, UW
A definition of the local atomic strain increments in three dimensions and an algorithm for computing them is presented. An arbitrary arrangement of atoms is tessellated into Delaunay tetrahedra, identifying interstices, and Voronoi polyhedra, identifying atomic domains. The deformation gradient increment tensor for interstitial space is obtained from the displacement increments of the corner atoms of Delaunay tetrahedra. The atomic site strain increment tensor is then obtained by finding the intersection of the Delaunay tetrahedra with the Voronoi polyhedra, accumulating the individual deformation gradient contributions of the intersected Delaunay tetrahedra into the Voronoi polyhedra. An example application is discussed, showing how the atomic strain clarifies the relative local atomic movement for a polymeric glass treated at the atomic level.
