Diffraction of Steady Stress Waves by Arbitrary Shaped Discontinuities in Elastic Medium

概要

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The diffraction of steady-state stress waves from arbitrary shaped inclusions in an infinite medium is described by means of a set of displacement potentials. Unlike some other formulations, this procedure can deal with boundaries of arbitrary shape. The solution of the integral equations yields a potential function at the interface which is employed to derive the stresses by surface integration. The formulation is presented for two-dimensional case. The inclusion is fixed in space which is void or rigid body for incident SH wave and is rigid body for incident P and SV waves. The resulting stress field was found to be in excellent agreement with that obtained from a series solution of diffraction of a plane harmonic wave from a rigid circular cylinder. solutions of other two-dimensional configurations of interest involving discontinuities are also presented.
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