921A钢结构低周疲劳裂纹扩展特性试验研究  

Experiment research on low frequency fatigue crack propagation rate of 921A hull steel structure

作　　者：刘燕红[1] 朱锡[1] 黄祥兵[1] 

机构地区：[1]海军工程大学船舶与动力学院,武汉430033

出　　处：《海军工程大学学报》2008年第4期69-74,共6页Journal of Naval University of Engineering

摘　　要：采用预制缺口的平板和加筋板结构试样,对921A钢进行了拉伸疲劳载荷作用下的低周疲劳试验,得到了拉伸疲劳载荷作用下舰体结构破口裂纹扩展规律,提出了破损舰体结构在疲劳载荷作用下裂纹开裂和后续扩展的判据。该试验结果可直接用于分析和预报破损舰船结构在波浪中航行时的裂纹扩展情况,并为破损舰船的剩余疲劳寿命预报奠定了基础。The rule of low frequency fatigue crack propagation of 921A steel structure was investigated experimentally under extension fatigue loading by using hull plate and stiffened plate structure specimens with V type gap. The criterion of crack initiation and propagation was offered. The experiment results may provide a good foundation for analyzing and predicting crack propagation situation of warships at sea and the remaining life assessment of damaged warships.

关 键 词：舰体结构 裂纹扩展速率 试验研究 低周疲劳 

分 类 号：U668.1[交通运输工程—船舶及航道工程]