In general the failures of pressure vessels are dominated by e lasto-plastic parameter named as J -integral. The J -integral parameter was adopted by many codes such as CEGB R6, PD6493 and SAPV95 to assess the str uctures safe ty.

• 压力容器的失效大多为弹塑性断裂失效 ,CEGBR6、PD64 93、SAPV95等规范都采用J积分参量进行断裂评价。