Dynamic fracture with meshfree enriched XFEM

被引：67

作者：

Menouillard, Thomas ^{[1
]}

Belytschko, Ted ^{[1
]}

机构：

[1] Northwestern Univ, Evanston, IL 60208 USA

来源：

ACTA MECHANICA | 2010年 / 213卷 / 1-2期

关键词：

FINITE-ELEMENT-METHOD; CRACK-TIP FIELDS; FREE GALERKIN METHODS; MESHLESS METHODS; DISCONTINUOUS ENRICHMENT; STRAIN CONCENTRATION; EXPLICIT DYNAMICS; X-FEM; PROPAGATION; GROWTH;

D O I：

10.1007/s00707-009-0275-z

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The enrichment of the extended finite element method (XFEM) by meshfree approximations is studied. The XFEM allows for modeling arbitrary discontinuities, but with low order elements the accuracy often needs improvement. Here, the meshfree approximation is used as an enrichment in a cluster of nodes about the crack tip to improve accuracy. Several numerical examples show that this leads to more accuracy for stress intensity factors computations, and to the capability to capture the branching point of a propagating crack from the stresses.

引用

页码：53 / 69

页数：17

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