摘要：In this paper, a j-cod design curve based on j-integral has been established, based onthe conservation franslating relationship between j-integral and CTOD. The j-cod designcurve of three materials (containing 16MnR、 A533B and 304 stainless steel) and two models(which are Elliptical Hole in Central Plate and Special Compact tension plate) have been pre-sented. By comparing j-cod design curve and cod design curve of CVDA-84, PD6493-80, as well as that of WES2805-83, the safety tolerance of the above cod design curvehave been evaluated.