A numerical analysis of stress intensity factors for cracks emanating from an elliptical hole in a rectangular plate under biaxial loads  

作　　者：闫相桥 

机构地区：[1]Research Laboratory on Composite Materials, Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2006年第6期740-744,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China (Grant No.10272037).

摘　　要：Concerns with stress intensity factors for cracks emanating from an elliptical hole in a rectangular plate under biaxial loads by means of a boundary element method which consists of non-singular displacement discontinuity element presented by Crouch and Starfied and crack-tip displacement discontinuity elements proposed by the author. In the boundary element implementation the left or the right crack-tip displacement discontinuity .clement is placed locally at the corresponding left or right crack tip on top of the constant displacement discontinuity elements that cover the entire crack surface and other boundaries. The present numerical re- suits further illustrate that the present numerical approach is very effective and accurate for calculating stress intensity factors of complex cracks in a finite plate and can reveal the effect of the biaxial load and the cracked body geometry on stress intensity factors.Concerns with stress intensity factors for cracks emanating from an elliptical hole in a rectangular plate under biaxial loads by means of a boundary element method which consists of non-singular displacement discontinuity element presented by Crouch and Starfied [6] and crack-tip displacement discontinuity elements proposed by the author. In the boundary element implementation the left or the right crack-tip displacement discontinuity element is placed locally at the corresponding left or right crack tip on top of the constant displacement discontinuity elements that cover the entire crack surface and other boundaries. The present numerical results further illustrate that the present numerical approach is very effective and accurate for calculating stress intensity factors of complex cracks in a finite plate and can reveal the effect of the biaxial load and the cracked body geometry on stress intensity factors.

关 键 词：CRACK intensity factor crack-tip element displacement discontinuity element 

分 类 号：TB33[一般工业技术—材料科学与工程]