STP833: Dynamic Crack Branching—A Photoelastic Evaluation

    Ramulu, M
    Research Assistant Professor, Professor, and Graduate Student, University of Washington, Seattle, Wash.

    Kobayashi, AS
    Research Assistant Professor, Professor, and Graduate Student, University of Washington, Seattle, Wash.

    Kang, BS-J
    Research Assistant Professor, Professor, and Graduate Student, University of Washington, Seattle, Wash.

    Pages: 19    Published: Jan 1984


    Abstract

    A necessary and sufficient condition for crack branching based on a crack branching stress intensity factor, KIb, accompanied by a minimum characteristic distance of rc is proposed. This crack branching criterion is evaluated by dynamic photoelastic experiments involving crack branching of six single-edged notch specimens and six wedge-loaded rectangular double cantilever beam specimens. Consistent crack branching at KIb = 2.04 MPa√m and rc = 1.3 mm verified this crack branching criterion. The crack branching angle predicted by this crack branching criterion agreed well with those measured in the crack branching experiments.

    Keywords:

    dynamic fracture, crack curving, crack branching, branching angle, critical radial distance, dynamic stress intensity factor, nonsingular stress, finite element method, fracture (materials), crack propagation


    Paper ID: STP32553S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP32553S


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