Abstract
Closed-form analytic expressions for the displacement and stress fields due to two axially symmetric sources, namely, the center of dilatation, and center of rotation in an elastic half-space are obtained using Galerkin vector approach. The correspondence principle of linear viscoelasticity is used to obtain the viscoelastic displacement and stress fields. A comparative study of both these sources has been done graphically. Our analysis revealed that the center of dilatation is more efficient than the center of rotation in generating radial displacement. The results are valid for arbitrary values of the Poisson's ratio and relaxation time.
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