An integrated approach to the determination and consequences of residual stress on the fatigue performance of welded aircraft structures
An integrated approach to the determination and consequences of residual stress on the fatigue performance of welded aircraft structures
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DOI：
10.1520/jai12547
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发表时间：
2006-02
期刊：
影响因子：
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通讯作者：
L. Edwards;M. Fitzpatrick;P. Irving;I. Sinclair;Xiang Zhang;D. Yapp
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文献类型：
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作者：
L. Edwards;M. Fitzpatrick;P. Irving;I. Sinclair;Xiang Zhang;D. Yapp
虽然焊接结构和部件中的残余应力长期以来一直被认为对其疲劳性能有影响，但获得可靠的、空间上精确的残余应力场数据一直是有限的。中子和同步加速器X射线衍射的最新进展允许获得焊接残余应力场的更详细的图像，从而允许开发和使用可用于飞机结构抗疲劳精确设计的预测模型。本文介绍了一个完全集成的研究伴随着国家的最先进的熔焊2024-T4铝合金的三维残余应力分布，以及它是如何受到后续的加工和服务负载。这项工作的一个特点是开发了一种技术，它允许对用于提供焊接飞机结构所需的设计数据的各种试样的残余应力场进行无损评价，并将这些信息综合到损伤容限设计的各个方面。
Although residual stress in welded structures and components has long been known to have an effect on their fatigue performance, access to reliable, spatially accurate residual stress field data has been limited. Recent advances in neutron and synchrotron X-ray diffraction allow a far more detailed picture of weld residual stress fields to be obtained that permits the development and use of predictive models that can be used for accurate design against fatigue in aircraft structures. This paper describes a fully integrated study of the three-dimensional residual stress distribution accompanying state-of-the-art fusion welds in 2024-T4 aluminum alloy, and how it is affected by subsequent machining and service loading. A particular feature of this work has been the development of techniques allowing the nondestructive evaluation of the residual stress field in the full range of specimens used to provide the design data required for welded aircraft structures and the integration of this information into all aspects of damage tolerant design.