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    Endurance—A Criterion of Design

    Published: Jan 1947

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    The internal-combustion engine is one of the most complex fatigue machines ever devised. Fundamentally it is a machine in which high cyclic loads are created. The manufacture of its components to withstand fatigue has been a problem for engine builders for over three-quarters of a century. We of the “Continental” group (Continental Motors, Gray Marine, Wisconsin Motors, and Continental Aviation) welcome the opportunity to participate in any series of discussions on the fatigue problem. Since the engine builder, perhaps more than any other manufacturer, has been plagued with fatigue failures, he has been forced to find a solution. Experimental stress analysis, the current answer, has been developed as a tool to indicate areas of high stress concentration by the use of photoelastic, stresscoat, and strain-gage techniques. The practical manner in which an engine builder may use stresscoat and straingage techniques to analyze a fatigue failure is the subject of this paper, for endurance strength is automatically achieved when the fatigue problem is solved.

    Author Information:

    Bean, W. T.
    Research Engineer, In Charge of Experimental Stress Analysis, Continental Aviation and Engineering Corp., Detroit, Mich.

    Committee/Subcommittee: E08.03

    DOI: 10.1520/STP47667S

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