Algorithm study of gradual fracture of ductile metallic material with finite element method

被引：0

作者：

Yang, Fengping ^{[1
]}

Sun, Qin ^{[1
]}

机构：

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

来源：

Jinshu Xuebao/Acta Metallurgica Sinica | 2008年 / 44卷 / 04期

关键词：

ABAQUS - Elastic moduli - Finite element method - Newton-Raphson method - Stress intensity factors;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In order to simulate the gradual expansion of the crack in ductile material, taking into account of the effects of elasticity-plasticity and geometric nonlinearity, the EWK damage model was used as the fracture criterion instead of stress intensity factors or J integral theory. Let this criterion be a subroutine of ABAQUS' main program and kept the two in real time communication in finite element algorithm. When some elements met the fracture criterion in subroutine, let the elastic modulus of these elements be 'zero' in main program to simulate physical fracture. One kind of Newton method which was suitable for localized unstable problems was used in this algorithm. Taking the tensile fracture of a rectangular sheet with a elliptical hole in its center as an example, a numerical result is obtained. The result shows that the effect of the fracture is according to the actual physical phenomena and the path of fracture is consistent with results of general experiments.

引用

页码：489 / 494