Based on some advances by means of meso-mechanics of ductile fracture of metals, two failure models of steels used in pressure vessel is proposed: one is dimple fracture, and another is shear-slip fracture.

• 结合细观力学在金属韧性材料断裂中的研究成果 ,提出压力容器用钢的断裂模式有两种 :韧窝型断裂模式和剪切型断裂模式 ;