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通过对金属韧性断裂的裂尖物理图象分析，提出了一种新的韧性启裂模型；在此基础上，结合钝化裂纹顶端的应力分布，导出了金属断裂韧性、拉伸性能以及伸张区宽度之间的关系，并得到了实验的验证．
A new toughness crack initiation model is proposed based on the physical image analysis of crack tip of metal ductile fracture. Based on the stress distribution of the crack tip, the fracture toughness, tensile properties and tensile strength Width of the relationship between, and has been experimentally verified.