Characteristics of Dislocation Stress Fields Due to Elastic Anisotropy

Abstract

In the solution of certain dislocation stress fields based on anisotropic elasticity, it is found that for −3>C>−4, where C is an anisotropic factor of the crystal, the σxx field of an edge dislocation is divided into six symmetric sectors of alternating tension and compression, in contrast to the usual case of half plane of tension and half plane of compression (C≥−3). The parameter C also characterizes the σxy field. For C≥−2.5, there is a relative maximum on the x axis as in the isotropic case. When −2.5>C>−4, the maximum changes to a relative minimum. The σyy field is identical to σxy field after a 90° rotation, and thus behaves similarly. Several consequences from these findings are discussed and examples are given.