Block-by-block approaches for spectrum fatigue crack growth prediction

摘要：

Two block-by-block approaches for improving spectrum fatigue crack growth prediction were proposed and developed in this Parer from the observations and analyses of fatigue crack growth behaviours in either representative specimens or real aircraft structures under flight spectrum loading by using the quantitative fractography method. The first approach is the flight-by-flight approach that can be used to predict crack growth history curves for a tested spectrum crack growth data at different stress level for a critical location. The second approach called the effective block approach can be used to predict crackgrowth histories for un-tested spectra based on some previously tested spectrum crack growth data. In order to demonstrate the robustness of the block-by-block approaches for aircraft damage tolerance analysis, verification and consistency studies were conducted and presented using fatigue test results for different aircraft structures under several flight spectra. It was found that the block-by-block approaches are able to provide significant advantages over conventional fatigue lifing approaches for aircraft damage tolerance analysis.

关键词： fatigue crack growth fe prediction Spectrum loading fractography luminium alloys tanium alloys

作者: N.Zhuang L.Molent

作者单位: ir Vehicles Division.De fence Science and Technology Organisation Melbourne,VIC 3207.Australia

会议类型: 国际会议

会议名称: The Eighth International Conference on Fundamentals of Fracture(ICFF VIII)(第八届断裂基础国际会议)

会议地点: 香港·广州

会议语种:英文

页码: 4933-4947

在线出版日期: 2008-01-03（万方平台首次上网日期，不代表论文的发表时间）