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- W3014465888 abstract "We investigate the effect of a semi-infinite rectilinear crack on diffraction and reflection of antiplane shear waves in an elastic solid with microstructure. Waves are induced by moving shear traction vectors applied at the faces of the crack. The material behavior is described by the indeterminate theory of couple stress elasticity considering micro inertia. This elastic constitutive model accounts for the material microstructure and it is a special case of the micropolar theory; it was developed by Koiter [10] for the quasi-static regime and later extended by Eringen [3] to include dynamic effects. The full-field solution is obtained through integral transforms and the Wiener-Hopf technique [18] and it may be used as a building block to solve general wave propagation problems in a cracked half-space in antiplane deformation. The solution differs significantly from the classical result given in [4] for isotropic elastic materials. Indeed, unlike classical elasticity, antiplane shear Rayleigh waves are supported in couple stress materials [17]. A complicated wave pattern appears which consists of entrained waves extending away from the crack, reflected Rayleigh waves, localized waves irradiating from and body waves scattered by the crack-tip. Wave diffraction and interference brings an important contribution to the stress intensity factors originally presented in [20] in the static framework. Resonance is triggered when the applied loading is fed into the crack-tip at Rayleigh speed and this result is confirmed by the evaluation of the energy release rate." @default.
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- W3014465888 date "2020-01-01" @default.
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- W3014465888 title "Diffraction and Reflection of Antiplane Shear Waves in a Cracked Couple Stress Elastic Material" @default.
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- W3014465888 doi "https://doi.org/10.1007/978-3-030-41057-5_11" @default.
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