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FH36船板钢抗疲劳性能分析
Analysis of Fatigue Resistance of FH36 Shipbuilding Steel Plate
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- DOI:
- 作者:
- 王孙中 1 ，彭兴东 1 ，张 鹏 2
WANG Sunzhong1 , PENG Xingdong1 , ZHANG Peng2
- 作者单位:
- 1.辽宁科技大学 材料与冶金学院，辽宁 鞍山 114051；2.海洋装备用金属材料及其应用国家重点实验室，辽宁 鞍山 114001
1.School of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China; 2. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114001, China
- 关键词:
- FH36；疲劳裂纹扩展速率；断裂韧性；应力强度因子；ANSYS
FH36 steel; fatigue crack propagation; fracture toughness; stress intensity factor; ANSYS
- 摘要:
- 采用双对数线性拟合和 J 积分法计算了 FH36 钢的 Paris 公式与疲劳断裂韧性值，结合试验和 SEM 表征了
FH36 钢疲劳裂纹扩展和疲劳断裂韧性断口的特征。 基于 ANSYS 对疲劳裂纹扩展过程进行了数值模拟分析。 结果表
明，疲劳断裂的韧性断口为微孔聚集断裂机制，模拟的裂纹前沿应力强度因子幅值随裂纹长度的变化趋势与试验结果
一致。
The Paris formula and fatigue fracture toughness of FH36 steel were calculated by means of log-log-linear fitting and J integral method. The fatigue crack propagation and fatigue fracture toughness fracture characteristics of FH36 were characterized by experiments and SEM, and the fatigue crack propagation process was simulated by ANSYS. The results show that the ductile fracture of fatigue fracture is microvoid coalescence mechanism of fracture, and the simulated variation trend between the stress intensity factor amplitude and crack length is consistent with that of experiment results.