STP969: Some Aspects of Performing Dynamic Measurements and Analyses on the Compact Crack Arrest Specimen for A533-B Steel

    Brickstad, B
    Research engineer and research manager, The Swedish Plant Inspectorate, Stockholm,

    Dahlberg, L
    Research engineer and research manager, The Swedish Plant Inspectorate, Stockholm,

    Pages: 15    Published: Jan 1988


    Abstract

    The four countries of Sweden, Norway, Finland, and Denmark are participating in a joint project which includes performing instrumented crack arrest experiments on A533-B steel. The primary aim of this study is to determine the dynamic fracture properties during propagation and arrest. Dynamic finite-element methods calculations were used to analyze earlier reported experiments on the transverse wedge-loaded compact crack arrest (CCA) specimen, in order to obtain guidance for future experiments regarding measuring technique, material characterization, and the crack-tip model. The computations indicate that the dynamic effects on the stress-intensity factor are small for the CCA specimen. It is also shown that proper determination of the displacement controlled boundary conditions can be made by measuring displacements at the load line. Computations were also made with the material treated as elastic-viscoplastic. It was found that nonlinear material behavior is likely to be important for A533-B steel at least at room temperature and higher temperatures.

    Keywords:

    crack arrest experiments, compact crack arrest specimen, A533-B steel, dynamic finite-element solutions, dynamic stress-intensity factor, load-line displacement, viscoplastic material behavior fracture mechanics


    Paper ID: STP33093S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP33093S


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