STP462: Fatigue Life of 2024-T3 Aluminum Alloy Under Narrow- and Broad-Band Random Loading

    Hillberry, BM
    Assistant Professor of Mechanical EngineeringPersonal Member, Purdue UniversityASTM, Lafayette, Ind.

    Pages: 17    Published: Jan 1970


    Abstract

    Narrow- and broad-band random fatigue tests were conducted on small cantilever specimens of 2024-T3 aluminum alloy. A slightly longer fatigue life was found with the broad-band loading. Both the Palmgren-Miner and Corten-Dolan theories were found to overestimate the fatigue life. A proposed equivalent-crack-length theory shows good agreement with the test results. Also, a means for comparing the fatigue life under different types of random loading is illustrated. In this work fatigue life is based on the number of peaks to failure.

    Keywords:

    fatigue, random loading, narrow band, broad band, spectrum, cumulative damage, aluminum


    Paper ID: STP32041S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP32041S


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