湖南大学学报（自然科学版）2018，Vol.45Issue(4)：74-81,8.DOI:10.16339/j.cnki.hdxbzkb.2018.04.010
基于相互作用积分方法的裂纹扩展分析
Analysis of Crack Growth Based on Interaction Integral Method
摘要
Abstract
In the process of analyzing crack growth with traditional finite element method,crack tip singularity is an urgent problem that must be faced with,and then the direction and length of the propaga-tion are closely related to the mesh of model.In this paper,a model that is not thoroughly dependent on the mesh and can be used for analyzing problems of crack growth is set up.Because interaction integral method can relieve the effects of singularity to some extent,severe requirements for meshing caused by singularity can be avoided.Stress intensity factor at the crack tip is solved by interaction integral via finite element method,and direction of the propagation is determined by the maximum circumferential tensile stress theory.When cracks propagate,only the meshes of concerned areas are regenerated in order to ob-tain the final extension path in a relatively precise way.At last,several typical examples,including growth of mode-I crack,cracks with a hole plate and cracks subj ected to compression,are compared with refer-ences.Reliability of the method in this paper is verified and applicability in many damaged patterns is shown as well.关键词
裂尖奇异性/相互作用积分/应力强度因子/有限元方法/裂纹扩展Key words
crack tip singularity/interaction integration/stress intension factor/finite element meth-od/crack propagation分类
数理科学引用本文复制引用
陈旻炜,李敏,陈伟民..基于相互作用积分方法的裂纹扩展分析[J].湖南大学学报（自然科学版）,2018,45(4):74-81,8.基金项目
国家自然科学基金重点项目(11232012),Key Project of Natural Science Foundation of China(11232012) （11232012）
国家自然科学基金面上项目(11372320),National Natural Science Foundation Item(11372320) （11372320）
