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    STP1359

    Mixed-Mode Fracture Mechanics Parameters of Elliptical Interface Cracks in Anisotropic Bimaterials

    Published: 01 January 1999


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    Abstract

    Two-dimensional interface cracks in anisotropic bimaterials have been studied extensively in the literature. However, solutions to three-dimensional interface cracks in anisotropic bimaterials are not available, except for circular (penny-shaped) cracks. In this paper, an elliptical crack on the interface between two anisotropic elastic half-spaces is considered. A formal solution is obtained by using the Stroh method in two dimensional elasticity in conjunction with the Fourier transform method. To illustrate the solution procedure, an elliptical delamination in a cross-ply composite is solved. Numerical results of the stress intensity factors and energy release rate along the crack front are obtained terms of the interfacial matrix M. It is found that the fields near the crack front are often in mixed mode, due to material anisotropy and the three dimensional nature of the crack front.

    Keywords:

    interface fracture, three-dimensional cracks, elliptical interface cracks, Stroh method, Fourier transform, stress intensity factors, mix-mode energy release rate, delamination, cross-ply laminates


    Author Information:

    Xue, Y
    Ph.D. candidate and associate professor, Georgia Institute of Technology, School of Mechanical Engineering, Atlanta, GA

    Qu, J
    Ph.D. candidate and associate professor, Georgia Institute of Technology, School of Mechanical Engineering, Atlanta, GA


    Committee/Subcommittee: E08.01

    DOI: 10.1520/STP14248S