局部自增强厚壁筒中非对称裂纹的应力强度因子

STRESS INTENSITY FACTORS FOR RADIAL ASYMMETRICAL CRACKS IN PARTIALLY AUTOFRETTAGE THICK WALLED CYLINDER

虽然已有许多文献给出了厚壁筒多条裂纹应力强度因子的计算方法和计算公式 ,但还没有见到关于局部自增强厚壁圆筒中压缩残余应力引起的多条非对称裂纹应力强度因子的文献发表 .本文推导了用权函数法计算这种裂纹的应力强度因子的计算公式 .借助于已经发表的其它载荷情况下的有限元结果 ,对一个大的裂纹几何参数根据权函数公式计算了其应力强度因子 ,可供从事这方面工作的工程技术人员参考 .

For many years, a great amount of work has been done on the problems of multiple radial cracks in thick-walled cylinder. However, up to now, nothing has been done on asymmetrical multiple radial cracks in partially autofrettaged thick-walled cylinder. In this paper the formula of SIF for multiple asymmetrical cracks in partially autofrettaged thick-walled cylinder has been developed by weight function, and the SIF results for a wide range of crack geometry parameters and all amounts of autofrettage are evaluated.