STP1321

    Predicting Fracture Behavior of Aluminum Alloys

    Published: Jan 1997


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    Abstract

    A computational method has been developed to predict the material fracture failure process in flawed or cracked specimens. This method does not require experimental material fracture data. Finite element technique is employed to model the physical shape of the specimen. Nonlinear spring elements are introduced to model the material damage behavior near a flaw or a crack tip. Crack initiation and crack propagation conditions are developed to predict the crack initiation load, the extent of material damage, and the crack growth behavior. The introduction of nonlinear spring elements and the development of crack initiation and crack growth conditions are unique features for fracture prediction with the development of this method. To prove the feasibility of the method, two types of specimen made by two aluminum alloys with similar material stress-strain data were studied. Fracture predictions by this method are comparable to experimental data.

    Keywords:

    Fracture, aluminum, crack propagation, ductile fracture, finite element analysis, failure prediction, stable tearing


    Author Information:

    Chang, AT
    Stevens Institute of Technology, Hoboken, NJ

    Cordes, JA
    Stevens Institute of Technology, Hoboken, NJ


    Paper ID: STP12330S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP12330S


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