STP1360

    Fatigue Analysis of Multiple Site Damage in Lap Joint Specimens

    Published: Jan 2000


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    Abstract

    This paper describes research to determine the influence of multiple-site damage on the fatigue life of lap joint specimens. Multiple-site damage is an important concern in aging aircraft and deals with determining failure conditions for multiple crack configurations. The goal of this paper is to determine the fatigue life for a mechanically fastened joint with multiple fatigue cracks located along one row of rivet holes. A predictive model for the fatigue life is evaluated with the results of several precracked specimens tested to failure under constant amplitude loading. Predictions for the growth and coalescence of individual cracks in specimens with various initial crack configurations and applied stress levels agree well with the experimental results.

    Keywords:

    lap joints, load transfer mechanism, hole expansion, rivets, multiple site damage, fatigue crack propagation, life prediction


    Author Information:

    Wang, H-L
    Former graduate research assistant and professor, School of Aeronautics and AstronauticsPurdue University, West Lafayette, IN

    Grandt, AF
    Former graduate research assistant and professor, School of Aeronautics and AstronauticsPurdue University, West Lafayette, IN


    Paper ID: STP13405S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP13405S


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