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    Volume 49, Issue 1

    Special Issue Paper

    Damage Accumulation in a Novel High-Throughput Technique to Characterize High Cycle Fatigue

    (Received 16 July 2019; accepted 21 April 2020)

    Published Online: 09 July 2020

    CODEN: JTEVAB

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    Abstract

    A multiple-insert carrier plate assembly has been developed to increase the throughput of vibration-based fatigue testing. Typically, in vibration-based fatigue testing, a cantilevered rectangular plate is excited in a high-frequency resonant mode until failure. In this manner, an S-N curve for bending fatigue can be constructed. The concept behind vibration-based fatigue testing has been improved by employing a U-shaped carrier plate and fastening multiple smaller specimens into the channel of the carrier plate, such that fatigue tests can be conducted in tandem. However, because of the presence of a variable stress field over the surface of the assembly, the strain in the specimens is unequal. To account for this unequal strain distribution, a framework is provided for estimating how damage accumulates within each specimen. Using this framework, the efficiency gained by adopting a multi-insert approach is evaluated. By optimizing the strategy with which specimens are replaced as they fail, a throughput 5.49 times greater than sequential testing is shown to be feasible.

    Author Information:

    Berke, Ryan B.
    Mechanical and Aerospace Engineering, Utah State University, Logan, UT

    Furman, Brandon A.
    Mechanical and Aerospace Engineering, Utah State University, Logan, UT

    Holycross, Casey
    Air Force Research Laboratory, Aerospace Systems Directorate, Dayton, OH

    Scott-Emuakpor, Onome
    Air Force Research Laboratory, Aerospace Systems Directorate, Dayton, OH


    Stock #: JTE20190593

    ISSN:0090-3973

    DOI: 10.1520/JTE20190593

    Author
    Title Damage Accumulation in a Novel High-Throughput Technique to Characterize High Cycle Fatigue
    Symposium ,
    Committee E08