Prediction of fatigue crack growth under real stress histories

被引：30
|
作者：
Pavlou, DG [1 ]
机构：
[1] Hellen Airforce Acad, Athens 16501, Greece
来源：
ENGINEERING STRUCTURES | 2000年 / 22卷 / 12期
关键词：
fatigue; fracture; crack; real loading;
D O I：
10.1016/S0141-0296(99)00069-3
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
A damage tolerance analysis methodology for cracks subjected to real loading is presented. A new retardation model, based on material hardening within the overload plastic zone, is developed for irregular stress histories. For the transformation of the irregular stress history into a stress history containing only distinguished cycles, a technique based on the rainflow counting method is used. The methodology is applied to real aircraft loading histories for the conventional 2024-T3 aluminum alloy and the advanced 8090-T8 aluminum-lithium alloy. Predictions agree well with the experimental results. Limitations of the prediction method are also discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1707 / 1713
页数：7
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