STP511

    Regression Models for the Effect of Stress Ratio on Fatigue Crack Growth Rate

    Published: Jan 1972


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    Abstract

    Regression models, based on linear elastic fracture mechanics, are used to interpret the effect of stress ratio on fatigue crack growth rate in 7075-T6 aluminum alloy. It is shown that fatigue crack growth rate can be related to range and maximum values of stress-intensity factor. Statistical techniques are used to examine the error which may accumulate when regression equations are used to predict crack growth versus cycles curves.

    Keywords:

    fatigue(materials), crack propagation, probability theory, regression analysis, stresses, stress analysis, statistical analysis, analysis of variance, tension tests, fracture(materials), stress concentration


    Author Information:

    Mukherjee, B
    Postdoctoral fellow and professor of mechanical engineering, University of Waterloo, Ont.

    Burns, DJ
    Postdoctoral fellow and professor of mechanical engineering, University of Waterloo, Ont.


    Paper ID: STP35404S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP35404S


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