STP1461

    Assessment of Plane Stress Tearing in Terms of Various Crack Driving Parameters

    Published: Jan 2005


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    Abstract

    The important role of mechanical parameters characterizing the global fracture behavior of a thin rectangular plate is demonstrated through comparison of various approaches to the investigation of ductile tearing at large amounts of stable crack extension. Tensile tests have been performed on middle-cracked specimens at different in-plane constraint states and on cruciform specimens. The latter geometry is treated as a physical counterpart of the basic structural element usually considered in model descriptions of tension- and/or compression-dominant crack geometries. Attention is focused on the simplest practical problem, namely, assessing the critical states of a center through crack under remote uniaxial tension. The case in point is a comprehensive assessment of the structural behavior of a thin-wall component where failure loads, displacements, and subcritical crack extensions must all be predicted from the crack growth data for a laboratory-size specimen of standard geometry.

    Keywords:

    plane stress tearing, boundary constraint, stress biaxiality, instability, energy dissipation rate, crack-tip opening angle, crack-mouth opening angle, crack volume ratio, ductile aluminum alloy


    Author Information:

    Naumenko, VP
    Leading Scientist and Senior Scientist, G.S. Pisarenko Institute for Problems of Strength, Kyiv,

    Volkov, GS
    Leading Scientist and Senior Scientist, G.S. Pisarenko Institute for Problems of Strength, Kyiv,


    Paper ID: STP11494S

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP11494S


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