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论文类型：期刊论文

发表时间：2013-03-01

发表刊物：19th European Conference on Fracture (ECF19)

收录刊物：SCIE、EI、CPCI-S

卷号：48

页面范围：247-256

ISSN号：0142-1123

关键字：Enriched element; Stress singularity; Cracks; Analytical solution; Eigenvalue

摘要：This paper presents a numerical method for fatigue crack growth in the framework of finite element method, i.e. a new enriched element is presented in which only the analytical solutions around crack tips are used to describe the displacements and stresses fields. A special variational principle is introduced to simplify the mathematical derivations for discrete equation, and the stiffness matrix of the new enriched element is given in a compact form. Moreover, the stiffness matrix is found to be independent on the element size. Numerical examples on fatigue crack growth are given to illustrate the validity of the present method. (C) 2012 Elsevier Ltd. All rights reserved.