Analyzing multiple crack propagation using extended finite element method (X-FEM)

被引：0

作者：

Shu, Yixiu ^{[1
]}

Li, Yazhi ^{[1
]}

Jiang, Wei ^{[1
]}

Jia, Yuxuan ^{[1
]}

机构：

[1] College of Aeronautics, Northwestern Polytechnical University, Xi'an,710072, China

来源：

Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University | 2015年 / 33卷 / 02期

关键词：

Drop breakup - Numerical methods - Stiffness matrix - Fatigue crack propagation - Hydrogels - ABAQUS - Crack tips - Stress intensity factors - Level measurement;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A numerical method and its implementation in ABAQUS using X-FEM to analyze multiple crack propagation was studied. The displacement discontinuity was approximated by appending enriched items to standard field. We give the initial cracks in the form of point-set or curve functions and dispersed them to the element nodes using Level Set Method (LSM). LSM was also used to track crack propagation paths. The local level set update technique was used to reduce the computing scale and the Judgmental Approach has been improved. The display of the process of crack propagation was realized using the commercial software Tecplot. Interaction integral technique was used to calculate mixed mode stress intensity factors. The maximal circumferential stress criterion was used to calculate the kinking angles of the propagating cracks. Influence of mesh and integral zone on simulation results were taken into consideration. Numerical examples were presented to demonstrate the benefits of the proposed implementation. ©, 2015, Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University. All right reserved.

引用

页码：197 / 203