金属材料疲劳裂纹扩展速率不同模型应用分析  

Analysis on Application of Different Models for Fatigue Crack Propagation Rate of Metallic Materials

作　　者：张亚军[1,2] 张欣耀 张云浩[1,3] ZHANG Yajun;ZHANG Xinyao;ZHANG Yunhao(Luoyang Ship Material Research Institute,Luoyang 471023,China;Henan Key Laboratory of Technology and Application of Structural Materials for Ships and Marine Equipments,Luoyang 471023,China;National New Material Production and Application Demonstration Platform(Advanced Marine Engineering and High-tech Ship Materials),Luoyang 471023,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [2]河南省船舶及海工装备结构材料技术与应用重点实验室,河南洛阳471023 [3]国家新材料生产应用示范平台(先进海工与高技术船舶材料),河南洛阳471023

出　　处：《材料开发与应用》2021年第2期88-92,共5页Development and Application of Materials

摘　　要：金属材料疲劳裂纹扩展速率是对金属材料及其零构件含有裂纹体后安全服役评价及疲劳寿命评估的一项重要力学性能指标。基于金属材料疲劳裂纹扩展过程的不同阶段、闭合效应、应力比对疲劳裂纹扩展速率的影响等多个方面,对几种常见金属材料疲劳裂纹扩展速率模型的应用特点进行了对比分析,为安全设计及寿命评估时不同模型的选择应用提供参考。Fatigue crack propagation rate of metallic materials is an important index of mechanical property, which is employed for assessment of safe service and prediction of fatigue life for metallic materials and their corresponding components with cracks in them. In this paper, based on different stages of fatigue crack propagation of metallic materials, closure effect, influence of stress ratio on fatigue crack propagation and so on, characteristics of different models for fatigue crack propagation rate were compared and analyzed, which would provide reference for selecting appropriate models in safety design and life prediction.

关 键 词：金属材料 疲劳裂纹扩展速率 模型 

分 类 号：O346.2[理学—固体力学]