机械科学与技术2012，Vol.31Issue(10)：1601-1604,4.
冷挤压对钛合金紧固结构件的耐久性影响研究
Effect of Cold Expansion on Durability of Fastener Hole Structure Parts of Titanium Alloy
摘要
Abstract
In this paper, experimental and analytical studies were conducted on the Ti-6Al-4V cold expanded fas- tener hole. The distribution of crack initiation life was determined by metallographic fracture data. Based on the crack growth formula, the equivalent initial flaw size which characterized the initial fatigue quality was obtained by optimizing the reference crack size and the upper limit of equivalent initial flaw size. The rated equivalent initial flaw size was then determined. Referring to a designated economic repair size, the economic repair life with the re- liability of 95% was obtained using the theory of probabilistie fracture mechanics. This work provided a theoretical guidance on the economic repair of structures containing cold expanded holes.关键词
钛合金/原始疲劳质量/裂纹萌生时间/当量初始缺陷尺寸/概率断裂力学Key words
titanium alloy/initial fatigue quality/equivalent initial flaw size (EIFS)/probabilistic fracture me- chanics approach分类
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王晓森,高行山,孙贤,韩鹍,岳珠峰..冷挤压对钛合金紧固结构件的耐久性影响研究[J].机械科学与技术,2012,31(10):1601-1604,4.基金项目
高等学校学科创新引智计划项目 （）
先进设计与智能计算省部共建教育部重点实验室开放课题项目（AD-IC2010007）资助 （）
