考虑应力比和门槛值的海水腐蚀疲劳裂纹扩展预测模型

刘冬, 刘静, 黄峰, 杜丽影, 彭文杰

Corrosion Fatigue Crack Growth Prediction Model Based on Stress Ratio and Threshold for Marine Engineering Steel DH36Z35 in Seawater

LIU Dong, LIU Jing, HUANG Feng, DU Liying, PENG Wenjie

表1 Paris模型拟合曲线方程及门槛值ΔKth

Table 1 Paris model fitting curve equation and the threshold value Δ Kth

No. Environment R C m r ΔKth S01 Air 0.1 4.313×10-10 3.767 0.989 7.49 S02 Air 0.3 3.645×10-10 4.054 0.986 6.54 S03 Air 0.5 4.088×10-9 3.128 0.993 4.41 S04 Seawater 0.1 4.712×10-10 3.733 0.972 9.15 S05 Seawater 0.3 2.631×10-10 4.248 0.953 7.79 S06 Seawater 0.5 1.690×10-10 4.538 0.961 6.07