Investigation of Durability Analysis Method Based on Performance Degradation Analysis

摘要：

One of the main concerns of mechanical structures is structural damage due to fatigue.This phenomenon is accentuated in initial flaw of structure, areas of stress concentration, and the connection of components,etc.Initial fatigue quality and configuration of structure have the most important effect on durability.However,obtaining equivalent initial flaw size (EIFS) of structure with durability tests is very costly and time-consuming.A new method of determining initial fatigue quality and crack growth rate is presented with performance degradation curves of specimens in this paper.Specimens with one rivet hole are used in the tests.According to test results and theoretic derivation, the relationship of crack length with loading cycle is established.Then,EIFS values are calculated and fatigue crack growth rates are estimated using exponential fitness technique.The applicability and validity of the method are verified with theoretic computation of fracture limit finally.

关键词： performance degradation analysis equivalent initial flaw size (EIFS) crack growth rate durability analysis fracture limit

作者: Yang Moucun Zhang Ling Nie Hong Xu Hainan

作者单位: School of Mechanical and Power Engineering Nanjing University of Technology Nanjing,China College of Economics and Management Nanjing University of Aeronautics and Astronautics Nanjing,China College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing,China

会议类型: 国际会议

会议名称: 2009 8th International Conference on Reliability,Maintainability and Safety(第八届中国国际可靠性、维修性、安全性会议)

会议地点: 成都

会议语种:英文

页码: 1066-1070

在线出版日期: 2009-08-24（万方平台首次上网日期，不代表论文的发表时间）