STP995V2

    A Closer Look at Tearing Instability and Arrest

    Published: Jan 1988


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    Abstract

    The objective of this work was to take an in-depth look at the process of ductile tearing instability and, especially, to evaluate experimentally the conditions for arrest of a ductile tearing instability. A secondary objective was to evaluate the sensitivity of a ductile tearing instability arrest to the rate at which it occurred and to the material rate sensitivity. Major conclusions are that the ductile tearing instability initiates slowly, but in a mechanical spring apparatus, it approaches drop-tower crack growth rate conditions, and hence the phenomenon is affected by the material rate sensitivity. The conditions necessary for arrest are completely stated and demonstrated by experimental data on a 3% nickel structural steel.

    Keywords:

    crack instability, tearing instability, crack arrest, tearing modulus, elastic-plastic fracture, J, -integral, crack propagation, fracture mechanics, nonlinear fracture mechanics


    Author Information:

    Joyce, JA
    Professor of mechanical engineering, United,


    Paper ID: STP27717S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP27717S


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