期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 70, 期 -, 页码 395-405出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2014.07.008
关键词
Laser peening; Re-peening; Fatigue; Optimization; FALSTAFF spectrum
Surface enhancement techniques, such as laser peening, have wide applications in the aerospace industry. They increase the structural component's life by imparting compressive residual stresses around the critical locations where the cracks are likely to initiate and later propagate leading to component failure. However, the compressive residual stresses can relax due to the loading conditions and reduce the laser peening effectiveness. Under such a condition, re-peening or re-laser peening a component already in service can further increase its component life. This research develops a method to predict the optimum re-peening time for maximum fatigue life under realistic loading conditions. An optimization problem is set up to illustrate the application of this method to an aircraft lug problem. Results from the investigation indicate that re-peening this component similar to 50-55% of its expected fatigue life maximizes the component's fatigue life. The proposed approach, proven to be able to obtain optimal process parameters for improving the fatigue resistance of the component, can significantly reduce the costs for experimental testing. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据