DIFFRACTION OF ELASTIC-WAVES BY 4 RIGID STRIPS EMBEDDED IN AN INFINITE ORTHOTROPIC MEDIUM

In the present paper, the elastodynamic response of four coplanar rigi d strips embedded in an infinite orthotropic medium due to elastic wav es incident normally on the strips is analyzed. The resulting mixed bo undary-value problem is solved by an integral-equation method. The nor mal stress and the vertical displacement are derived in closed analyti c form. Numerical values of stress-intensity factors at the edges of t he strips and vertical displacements at point in the plane of the stri ps for several orthotropic materials are calculated and plotted graphi cally to show the effect of material orthotropy.