STP613: Fatigue Testing Using a Digital Computer-Based System

    Donaldson, KH
    Research assistant, research assistant, and professor, University of IllinoisMTS Systems CorporationNorthrup Corporation, UrbanaMinneapolisHawthorne, Ill.Minn.Calif.

    Dittmer, DF
    Research assistant, research assistant, and professor, University of IllinoisMTS Systems CorporationNorthrup Corporation, UrbanaMinneapolisHawthorne, Ill.Minn.Calif.

    Morrow, J
    Research assistant, research assistant, and professor, University of IllinoisMTS Systems CorporationNorthrup Corporation, UrbanaMinneapolisHawthorne, Ill.Minn.Calif.

    Pages: 23    Published: Jan 1976


    Abstract

    The use of a digital computer-based materials test system for evaluating the fatigue resistance of metals is described. Some examples of the types of tests employed in fatigue research are given. These include tests involving the control of strain with time such as cyclic stress-strain and low cycle fatigue. In addition, experiments are described that require the control of variables that must be calculated from the real time response of the specimen. Included are cyclic plastic strain control and tests in which the ratio of plastic to elastic cyclic strains is held constant.

    These common fatigue evaluation tests are shown to be quickly and easily programmed through the use of an operator oriented interactive computer language. On-line data reduction capabilities of the system are shown to produce test results in a readily useable format.

    Keywords:

    fatigue (materials), computers, test equipment, digital differential analyzers, servomechanisms, stresses, strains, hysteresis


    Paper ID: STP27901S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP27901S


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