STP1207: Elastic-Plastic Mode II Fracture in an Aluminum Beam

    Cordes, J
    Assistant professor and research professor, Stevens Institute of Technology, Hoboken, NJ

    Yazici, R
    Assistant professor and research professor, Stevens Institute of Technology, Hoboken, NJ

    Pages: 13    Published: Jan 1994


    Abstract

    This paper describes an experimental and analytic study of Mode II fracture in a ductile aluminum beam. Mode II fracture is characterized by an in-plane sliding of crack surfaces relative to one another. For ductile materials such as aluminum, failure is preceded by yielding near the crack tip. In this paper, a Mode II fracture anaylsis technique that includes yielding near the crack tip is presented. Unlike other methods, the analysis presented in this paper (1) provides a simple method for modeling stable and unstable crack growth; (2) can be implemented with a general purpose finite-element package; (3) predicts the maximum load at failure and the nature of the failure, either unstable crack growth or yield; (4) includes interface elements to prevent overlap of the crack surfaces; and (5) includes directly the R-curve values. The finite-element modeling technique provided a reasonable, qualitative approximation of experimental behavior.

    Keywords:

    Mode II fracture, elastic-plastic fracture, finite-element analysis, damage zone model, stable crack growth


    Paper ID: STP13726S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP13726S


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