在役压力容器含缺陷结构腐蚀疲劳剩余寿命预测的随机分析

Stochastic Calculation of Corrosion Fatigue Residual Life for In-service Structure Containing Defects

本文根据 0Cr18Ni9钢在 10 0 0ppmNaCl溶液中的腐蚀疲劳裂纹扩展速率计算公式 ,采用概率方法 ,考虑裂纹尺寸、载荷、材料等参数的随机性 ,给出腐蚀疲劳剩余寿命随机计算方法。最后 。

Based on the corrosion fatigue crack propagation formula of 0Cr18Ni9 steel in 1000ppm NaCl solution, and considering the randomness of crack size, load, material parameters with probabilistic method, the stochastic method of corrosion fatigue residual life was proposed in this paper. At last the engineering case demonstrates that the method is effective.