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Dislocation technique to obtain the dynamic stress intensity factors for multiple cracks in a half-plane under impact load

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Abstract

In this study, the transient response of multiple cracks subjected to shear impact load in a half-plane is investigated. At first, exact analytical solution for the transient response of Volterra-type dislocation in a half-plane is obtained by using the Cagniard-de Hoop method of Laplace inversion and is expressed in explicit forms. The distributed dislocation technique is used to construct integral equations for a half-plane weakened by multiple arbitrary cracks. These equations are of Cauchy singular type at the location of dislocation solved numerically to obtain the dislocation density on the cracks faces. The dislocation densities are employed to determine dynamic stress intensity factors history for multiple smooth cracks. Finally, several examples are presented to demonstrate the applicability of the proposed solution.

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Authors and Affiliations

  1. Faculty of Engineering, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran

    A. A. Hejazi, M. Ayatollahi, R. Bagheri & M. M. Monfared

Authors
  1. A. A. Hejazi
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  2. M. Ayatollahi
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  3. R. Bagheri
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  4. M. M. Monfared
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Correspondence to M. Ayatollahi.

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Hejazi, A.A., Ayatollahi, M., Bagheri, R. et al. Dislocation technique to obtain the dynamic stress intensity factors for multiple cracks in a half-plane under impact load. Arch Appl Mech 84, 95–107 (2014). https://doi.org/10.1007/s00419-013-0785-y

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  • DOI: https://doi.org/10.1007/s00419-013-0785-y

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