本文提出了一个新的断裂准则——裂纹咀张开位移率准则及新的材料断裂韧性参量V(?),并用实验验证了该准则的有效性。该准则特别适用于表面裂纹弹塑性起裂载荷的确定。V(?)可以用单试件法测定,并给出了V_(1c)与K_(1(?)),σ_c,J(?)的相互换算关系式。
The elastie-pla(?)stic fracture of pressure vessel steels is a processfrom initiation to stable propagation and to unstable fracture.To study anddesoribe this complex process quantitatively has been one of the importantproblems of engineering fracture mec
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