STP303: Rapid-Rate Compression Testing of Sheet Materials at High Temperatures

    Bernett, E. C.
    Research Specialist, California Institute of Technology, Pasadena, Calif.

    Gerberich, W. W.
    Research Engineer, California Institute of Technology, Pasadena, Calif.

    Pages: 15    Published: Jan 1962


    This paper describes the test equipment developed and the procedures used to evaluate structural sheet material compression properties at preselected constant strain rates or loads. Electrical self-resistance was used to achieve a rapid heating rate of 200 F per sec. Four materials were tested at maximum temperatures which ranged from 600 F for an aluminum alloy to 2000 F for a Ni-Cr-Co iron-base alloy. Tests at 0.1,0.001, and 0.00001 in. per in. per sec showed that strain rate has a major effect on the measured strength, especially at the high temperatures. The tests, under conditions of constant temperature and constant compression stress, showed that creep deformation can be a critical factor even when the time involved is on the order of a few seconds or less. The theoretical and practical aspects of rapid-rate compression testing are presented, and suggestions are made regarding possible modifications of the equipment which would improve the over-all capabilities.

    Paper ID: STP46991S

    Committee/Subcommittee: E28.10

    DOI: 10.1520/STP46991S

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