Thermo-anisotropic crack propagation by XFEM

被引：27

作者：

Bouhala, Lyazid ^{[1
]}

Makradi, Ahmed ^{[1
]}

Belouettar, Salim ^{[1
]}

机构：

[1] Luxembourg Inst Sci & Technol, L-4362 Esch Sur Alzette, Luxembourg

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2015年 / 103卷

关键词：

Anisotropic; Asymptotic; Cracked solid; XFEM; FINITE-ELEMENT-METHOD; FUNCTIONALLY GRADED MATERIALS; MODE FRACTURE-ANALYSIS; ORTHOTROPIC MEDIA; ENRICHMENT FUNCTIONS; PARAMETERS; PARTITION; MECHANICS; FAILURE; SOLIDS;

D O I：

10.1016/j.ijmecsci.2015.09.014

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The extended finite element method (XFEM) is utilized to model the crack propagation in thermoanisotropic elastic materials. The discontinuity at the crack surface is located and modelled using the level set principle whereas the singularity at the crack tip is handled using special branch enrichment functions derived from the asymptotic analysis following Lekhnitskii's formalism in anisotropic media. The crack starts to propagate when the maximum circumferential stress to strength ratio criterion is satisfied. The numerical model is validated by comparing the computed stress intensity factors (SIFs) with the existing ones for static cracks. Eventually, the effect of anisotropy on the crack propagation path is investigated by carrying out several simulations. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：235 / 246

页数：12

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