疲劳小裂纹理论及其应用  

Review of Small-crack Theory and Its Applications

作　　者：李锋[1] 何宇廷[1] 范超华[1] 李鸿鹏[1] 崔荣洪[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《机械工程材料》2007年第11期6-9,共4页Materials For Mechanical Engineering

基　　金：国防"十一五"重点预研资助项目(513270501);空军工程大学工程学院博士基金资助项目(BC0505;BC06008)

摘　　要：疲劳小裂纹扩展行为是结构耐久性和损伤容限设计中关心的重要问题。着重对疲劳小裂纹扩展的微观机制、解析描述进行了分析和讨论;并评述了疲劳小裂纹理论在全寿命预测、耐久性分析和裂纹形成/扩展分界等方面的应用。Fatigue small crack growth behavior is an important issue in structural durability and damage tolerance design.Small-crack theory is reviewed in this paper.Microstructural effects in small crack growth and analytical description of small crack growth rate are emphatically analyzed.Also the applications of small-crack theory to total fatigue life prediction,durability analysis,and crack initiation/propagation demarcation are briefly discussed.

关 键 词：小裂纹理论 微观机制 裂纹扩展速率 

分 类 号：TG115[金属学及工艺—物理冶金]