An Integrated Approach to the Determination and Consequences of Residual Stress on the Fatigue Performance of Welded Aircraft Structures

    Volume 3, Issue 2 (February 2006)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 21 December 2005

    Page Count: 17


    Edwards, L
    Professor of Structural Integrity, Open University, Milton Keynes,

    Fitzpatrick, ME
    Senior Lecturer, Open University, Milton Keynes,

    Irving, PE
    Professor of Damage Tolerance, School of Industrial and Manufacturing Sciences, Cranfield University, Cranfield, Bedfordshire

    Sinclair, I
    Reader, School of Engineering, Southampton University, Southampton, UK

    Zhang, X
    Senior Lecturer, School of Engineering, Cranfield University, Cranfield, Bedfordshire

    Yapp, D
    Senior Lecturer, School of Industrial and Manufacturing Sciences, Cranfield University, Cranfield, Bedfordshire

    (Received 7 January 2005; accepted 24 August 2005)

    Abstract

    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.


    Paper ID: JAI12547

    DOI: 10.1520/JAI12547

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    Author
    Title An Integrated Approach to the Determination and Consequences of Residual Stress on the Fatigue Performance of Welded Aircraft Structures
    Symposium , 0000-00-00
    Committee E28