变载抗断裂的概率计算

Probability Calculation of Resisting Fracture under Alternating Load

本文根据应力-强度模型和断裂力学的理论,给出了在变载荷作用下,裂纹不扩展、给定寿命时不断裂的概率计算公式和给定可靠度时可靠寿命的计算步骤。

In this paper, besed on the theory of stress strength model and the fracture mechanics, formulas of probability calculation is presented under the affection of alternating load without spread of crackle and fracture in the appointed life period.Furthermore, the steps for calculation of reliable life span with an appointed reliability has also been given.