表面き裂を有する配管の延性不安定破壊 : 第1報,表面き裂の進展解析

抄録

This paper describes the crack growth analysis of circumferential surface cracks in pipes, by the Line spring Method. The COA criterion is used for the crack growth analysis; and not only the radial crack growth but also the circumferential crack growth after penetration can be analyzed. The calculation is carried out for two circumferential cracks. One shows the maximum load after the penetration, and the other shows the maximum load before the penetration. Under the load controlled system, the former satisfies Leak-Before-Break while the later does not.