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    Computer Simulation of Fast Crack Propagation and Arrest in Steel Plate with Temperature Gradient Based on Local Fracture Stress Criterion

    Published: 01 January 1997

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    A fracture mechanics model for fast crack propagation and arrest is proposed based on the local fracture stress criterion. Dynamic fracture toughness (KD) for a propagating crack is calculated as a function of crack velocity and temperature. The model is extended to incorporate the effect of unbroken ligament (UL) formed near the plate surfaces and crack-front-tunneling. The model simulates acceleration, deceleration and arrest of a crack in a ESSO or a double-tension test plate with temperature-gradient. Calculated arrested crack lengths compare well with experimental results. It is shown that the conventional crack arrest toughness calculated from applied stress and arrested crack length depends on temperature-gradient and the toughness is not a unique material property.


    dynamic fracture, stress intensity factor, arrest toughness, shear lip, crack velocity

    Author Information:

    Machida, S
    Univeristy of Tokyo,

    Yoshinari, H
    Univeristy of Tokyo,

    Aihara, S
    Nagoya R&D Laboratories, Nippon Steel Corporation,

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP12333S