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.
作者
王孙中
彭兴东
张鹏
WANG Sunzhong;PENG Xingdong;ZHANG Peng(School of Material and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan 114001,China)
出处
《铸造技术》
CAS
2022年第7期531-536,共6页
Foundry Technology
基金
辽科大—海洋装备用金属材料及其应用国家重点实验室联合基金(HGSKLUSTLN(2020)07)。
