构件裂纹塑性扩展剩余强度的估算方法  

Caculating method of residual strength with structure crack plastic growth

作　　者：陈忠安[1] 黄大强[1] 

机构地区：[1]江苏大学理学院,江苏镇江212013

出　　处：《四川建筑科学研究》2008年第3期70-74,共5页Sichuan Building Science

基　　金：江苏大学高级技术人才科研启动基金项目(1281190001)

摘　　要：利用J-A2方法对A533B钢双边切口试样J-R曲线进行约束修正。在此基础上,通过计算构件裂纹尖端的约束参数A2预测其J-R曲线,并结合裂纹驱动力曲线估算其剩余强度,为工程上其他含裂纹构件最大承载力的确定提供一种有效的估算方法。最后,用J-A2方法估算含周裂纹钢管的剩余强度。J - R curves of A533B double edge-notched specimen is modified by J - A2 solution. On the basis of these, through the value of A2, J - R curves of structure is predicted. Combining J - R curves predicted with the crack driving force curves of structure by FEA, the residual strength of structure could be calculated. It provides a method for other structures to get their end load. At last, the residual strength of pipe was caculated.

关 键 词：约束参数A2 J-R曲线 J-A2方法 剩余强度 

分 类 号：O346.1[理学—固体力学]