机构地区: 清华大学航天航空学院工程力学系
出 处: 《重庆建筑大学学报》 2000年第6期29-33,共5页
摘 要: 应用边界元 (BEM)子域法 ,编写程序 ,计算 3D混合模式表面裂纹的应力强度因子。按照 T型焊接接头的实验模型建立边界元计算模型。计算结果表明 。 In this paper, based on multi region boundary element method (BEM), a general procedure to calculate stress intensity factors(SIF) of a 3D mixed mode fatigue surface crack is detailed. A BEM model for a welded T joint is constructed referring to the test specimen. The crack corner points are indirectly estimated to circumvent the treatment of the different crack tip singularity at the corner regions. Numerical results from the welded T joint show that this procedure is reliable.