STP803V2

    Evaluation of Blunting Line and Elastic-Plastic Fracture Toughness

    Published: Jan 1983


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    Abstract

    The Japan Society of Mechanical Engineers (JSME) has made an effort towards standardization of the JIc test method. The recommended procedure includes two multiple-specimen methods [obtained at the intersections of the experimentally determined J-stretched zone width (SZW) blunting line and the R-curve, and of the J-SZW blunting line and the critical stretched zone width (SZWc)] and three single-specimen methods (ultrasonic, electrical potential, and acoustic emission). Concerning the blunting line and the R-curve, many experimental data have been accumulated by the present authors in recent years.

    In this paper, the evaluation method of the blunting line and of the R-curve and their application to the JIc test are discussed with special attention to a comparison between two methods recommended by JSME and the American Society for Testing and Materials.

    Keywords:

    elastic-plastic fracture, J-integral, stretched zone, crack initiation, crack extension, blunting line, R-curve, tearing modulus


    Author Information:

    Kobayashi, H
    Associate professor, research associate, and professor, Tokyo Institute of Technology, Tokyo,

    Nakamura, H
    Associate professor, research associate, and professor, Tokyo Institute of Technology, Tokyo,

    Nakazawa, H
    Associate professor, research associate, and professor, Tokyo Institute of Technology, Tokyo,


    Paper ID: STP36780S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP36780S


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