评估材料断裂韧性的损伤等效法

On the Experiments of Computer Controlfor Structutal Vibration

以实际结构充实验试件与ＨＲＲ裂尖场的一特征点的损伤相当为原则，建立了ＨＲＲ场的裂尖控制参数与实际试件在结构裂尖控制参数之间的关系．据此可消除不同试件因约束不同而导致的断裂韧性的变化；亦可用来评估实际结构及试件的断裂失效。

Based on the damage equivalence at a characteristic point ahead of a crack for cracked structurecomponent or specimen and HRR field.the relationship between the fracture parameters of the crackedstructure component or specimen and HRR field was established in this paper. According to the rela-tionship the change of fracture toughness with constraint in different specimens were eliminated,andthe relationship was also used to evaluate the fracture failure for different specimens.