Discussion on failure criteria of orthogonally biaxial stress field

Abstract

Some components which constitute a part of the boundary in nuclear plants are very important from the viewpoint of protection of radioactive material propagation. Especially, it is a serious matter if the function as the boundary is maintained or not in the case of severe accident (SA). In this paper the characteristics of FLD (Forming Limit Diagram) as the failure criteria is studied compared with the rule of ASME Code and the applicability to the boundaries of structures is discussed. Furthermore, the prospect of the application of FLSC (Forming Limit Stress Curve) to structural components including loading hysteresis is referred.