期刊
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
卷 56, 期 1, 页码 200-214出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jmps.2007.07.010
关键词
dislocations; interfaces; extended finite element method; Peach-Koehler force; nonlinear
A recently developed finite element method for the modeling of dislocations is improved by adding enrichments in the neighborhood of the dislocation core. In this method, the dislocation is modeled by a line or surface of discontinuity in two or three dimensions. The method is applicable to nonlinear and anisotropic materials, large deformations, and complicated geometries. Two separate enrichments are considered: a discontinuous jump enrichment and a singular enrichment based on the closed-form, infinite-domain solutions for the dislocation core. Several examples are presented for dislocations constrained in layered materials in 2D and 3D to illustrate the applicability of the method to interface problems. (c) 2007 Elsevier Ltd. All rights reserved.
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