机械科学与技术2012，Vol.31Issue(3)：363-366,4.
有限大体复合型表面裂纹断裂特性研究
The Fracture Characteristic for Inclined Mixed Mode Surface Crack in Finite Body
摘要
Abstract
The three dimensional mixed-mode surface cracks usually occurrs in engineering complicated structure,and to study on the three dimensional mixed-mode surface cracks is useful to perfect assess technique of three dimensional damage tolerance.In this paper,S-FEM is applied to solve stress intensity factors for inclined mixed mode surface cracks in finite body.The effect of inclination angles and crack shape on the mixed mode fracture solution was discussed in detail.It is shown that mode I stress intensity factors decreased in magnitude along the whole crack front as the inclination angle increases.Mode II and mode III stress intensity factors,on the other hand,increased initially as the inclination angle increases and then decreased for higher inclination angles.It is also shown that maximum stress intensity factors of a surface crack usually appear at the deepest point of the crack,or a certain point along crack front near the free surface depending on the aspect ratio of the crack.The results can be referred for mixed mode damage tolerance analysis of 3-D structure in engineering.关键词
有限元重合网格法/表面裂纹/复合型/应力强度因子/损伤容限Key words
S-version finite element method(S-FEM)/surface crack/mixed mode/stress intensity factor(SIF)/damage tolerance分类
航空航天引用本文复制引用
谢伟,张炯,黄其青,殷之平..有限大体复合型表面裂纹断裂特性研究[J].机械科学与技术,2012,31(3):363-366,4.基金项目
国家自然科学基金项目（11102158）资助 （）
