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    Multiaxial Fatigue Analysis of Interference-Fit Steel Fasteners in Aluminum Al 2024-T3 Specimens

    Published: 01 January 2003

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    Fatigue failure of interference-fit aluminum joints has been investigated by testing several specimens geometries, conducting numerical simulations and using multiaxial fatigue theories. The experiments included center crack, edge crack and uncracked specimens, fitted with a zero load-transfer interference-fit fasteners and tested to failure at different cyclic loads. An elastic-plastic contact finite element (EPFE) analysis was carried out to simulate the local combined interference and cyclic stress distribution in the specimens near the fastener's hole. The simulation and test results were used in a multiaxial fatigue analysis that examined several theories including the critical plane approach (McDiarmid theory) and the octahedral stress parameter (Crossland theory). The experimental lives were correlated by calculating the multiaxial fatigue parameters at different locations along the hole edge. A fairly good correlation was obtained by using the maximum values of the multiaxial stress parameters obtained from the EPFE analysis along the specimens hole edge. The analysis indicated that the fatigue critical location for crack initiation was not always at the location of the maximum nominal principal stress at the hole edge therefore a uniaxial stress analysis may lead to a non-conservative failure prediction for these type of joints.


    multiaxial fatigue, interference fit joints, aluminum alloy, finite element analysis, generalized Neuber theory, thermal stress analysis

    Author Information:

    Shatil, G
    Senior Lecturer, School of Engineering, CEMS, University of the West of England, Bristol,

    Page, AG
    Research Assistant, School of Engineering, CEMS, University of the West of England, Bristol,

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP11077S