Transient stress waves in an axisymmetrically voigt-viscoelastic layered space subjected to concentrated noprmal loads.

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In this paper, the equations of motion in linear viscoelasticity of Voigt type are directly solved with the boundary-initial conditions, instead of employing the displacement potential theory and the integral transform technique for reducing the time variable. The problem treated is the transient wave propagation in an infinite viscoelastic layer overlaying on a viscoelastic half-space, which is excited by concentrated normal loads at the surface and inside. The solution is obtained by the use of Hankel transform and separation of variables for eigenfunction expansion based on the elastic frequency equations. The displacements and stresses generated by the sudden application of concentrated normal loads are computed. Numerical results show the wave propagation including reflection, refraction and transmission of wave front at the interface as a Love wave
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