Study of engineering treatment of failure assessment curves of cracked structure based on double-parameter J-Q criterion

Considering the influence of stress-triaxiality on stress-strain field near crack tip, the theory that used to access the integrity of homogeneous materials has been discussed in this paper. In addition, the failure assessment curves of cracked structure based on double-parameter J-Q criterion are founded. By utilizing the finite element numerical results, the engineering treatment methods of each factor in the failure assessment curves are obtained. In the end, calculation approach for the failure assessment curves set up in this paper has been compared with the available procedure