Disturbance in an elastic half space due to an impulsive twisting moment applied to an attached rigid circular disc

Abstract

A rigid circular disc is attached to the surface of an isotropic elastic half space. A twisting moment in the form of Pr δ(t) where P is a constant and δ(t) is the dirac-delta function is applied to the disc. Following Cagniard and Dix the exact evaluation of the displacement at any point in the medium has been made.