不同驱动参量的金属材料疲劳裂纹扩展速率模型综述  

Review on Model of Fatigue Crack Propagation Rate for Metallic Materials Based on Different Driving Parameters

作　　者：张亚军 张新烨 徐阳 单建军 张欣耀 ZHANG Yajun;ZHANG Xinye;XU Yang;SHAN Jianjun;ZHANG Xinyao(National Key Laboratory of Marine Corrosion and Protection,Luoyang 471023,China;CSSC No.725 Research Institute,Luoyang 471023,China;Henan Key Laboratory of Technology and Application of Structural Materials for Ships and Marine Equipments,Luoyang 471023,China;Institute of Disaster Prevention,Langfang 065201,China)

机构地区：[1]海洋腐蚀腐蚀与防护全国重点实验室,河南洛阳471023 [2]中国船舶集团有限公司第七二五研究所,河南洛阳471023 [3]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 [4]防灾科技学院,河北廊坊065201

出　　处：《热加工工艺》2024年第5期119-123,共5页Hot Working Technology

基　　金：海洋腐蚀与防护全国重点实验室基金课题(JS236601)。

摘　　要：疲劳裂纹扩展速率da/d N是金属材料进行损伤容限设计时用到的一项重要力学性能指标,其获得并不直接依赖于裂纹扩展的驱动参量,这为采用不同驱动参量表征da/d N提供了可能性。本文分别介绍了以裂纹尖端应力强度因子范围△K、能量释放率变化范围△G、J积分变化范围△J、张开位移变化范围△δ、塑性区变化范围△r、裂纹前缘附近应变范围△εT等为疲劳裂纹扩展驱动参量的裂纹扩展速率模型及应用,为研究疲劳裂纹扩展规律时不同驱动参量的选择提供依据。Fatigue crack propagation rate da/dN is an important mechanical index for damage tolerance design of metallic materials,and it does not directly rely on its driving parameter,which provides probability to characterize da/dN with different driving parameters.Some models of fatigue crack propagation rate based on different driving parameters and their applications were introduced.The driving parameters include stress intensity factor range△K,energy release rate range△G,J integration range△J,opening displacement range△δ,plastic area range△r at the crack tip and strain range△εT near the crack front.The results provide references for selection of different driving parameters on study of fatigue crack propagation.

关 键 词：驱动参量 金属材料 疲劳裂纹扩展速率 模型 

分 类 号：TG407[金属学及工艺—焊接]