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Stress intensity factors for a moving cylindrical crack in a nonhomogeneous cylindrical layer in composite materials

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Abstract

Stresses are determined for a finite cylindrical crack that is propagating with a constant velocity in a nonhomogeneous cylindrical elastic layer, sandwiched between an infinite elastic medium and a circular elastic cylinder made from another material. The Galilean transformation is employed to express the wave equations in terms of coordinates that are attached to the moving crack. An internal gas pressure is then applied to the crack surfaces. The solution is derived by dividing the nonhomogeneous interfacial layer into several homogeneous cylindrical layers with different material properties. The boundary conditions are reduced to two pairs of dual integral equations. These equations are solved by expanding the differences in the crack surface displacements into a series of functions that are equal to zero outside the crack. The Schmidt method is then used to solve for the unknown coefficients in the series. Numerical calculations for the stress intensity factors were performed for speeds and composite material combinations.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Kanagawa University, Rokkakubashi, Kanagawa-ku, Yokohama, 221-8686, Japan

    S. Itou

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  1. S. Itou
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Itou, S. Stress intensity factors for a moving cylindrical crack in a nonhomogeneous cylindrical layer in composite materials. Arch Appl Mech 75, 18–30 (2005). https://doi.org/10.1007/s00419-005-0382-9

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  • DOI: https://doi.org/10.1007/s00419-005-0382-9

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