Volume 3, Issue 3 (March 2006)

    3D FEA Simulations to Assess Residual Stresses in Riveting Processes

    (Received 2 December 2004; accepted 30 September 2005)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    Multiple site damage (MSD) in aircraft structures can be defined by the presence of numerous minute cracks arising at different locations such as rivet holes in lap joints. One source of initiation can be due to residual stresses induced in the lap joints during the riveting process. This paper describes a finite element methodology of a quasistatic, displacement controlled riveting process to capture the local geometry features representative of service hole quality for accurate simulation of residual stresses in riveted lap joints. A three-dimensional finite element (FE) model that takes into account material, geometric, and contact non-linearities is developed using ABAQUS/Standard 6.4-1 to simulate the joining process. The interest of FE simulations is to conduct parametric studies to observe effects of varying hole clearance, misaligned holes, friction, and presence of debris on the residual stress state in the skin. Based on studies conducted, comments are made regarding any observed variation in tensile hoop stress, which is the primary source of fatigue cracks in riveted lap joints. A relation between the rivet-head deformation ratio and rivet-head height with applied displacement is developed using the finite element model, as a means of controlling the rivet-head deformation.


    Author Information:

    Atre, A
    Graduate Research Assistant and Professor, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA

    Johnson, WS
    Graduate Research Assistant and Professor, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA


    Stock #: JAI13077

    ISSN: 1546-962X

    DOI: 10.1520/JAI13077

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    Author
    Title 3D FEA Simulations to Assess Residual Stresses in Riveting Processes
    Symposium Structural Integrity of Fasteners Including the Effects of Environment and Stress Corrosion Cracking, 2004-11-10
    Committee E08