Rigid body rotation near mode I crack in infinite orthotropic plate

Abstract

Rigid body rotation is obtained at the points near the crack tip of a mode I crack in an infinite orthotropic plate. Using Lekhnitskii's complex analysis procedure the rotation is expressed in terms of complex potentials. A relation of rigid body rotation is presented by incorporating the stress intensity factor and material constants of orthotropic material. Crack opening displacement is obtained from the rotation of points lying on crack edges and the crack tip opening angle is shown to depend only on material parameters. The region of constant rotation around the crack tip plastic zone is described in the light of the difference between isotropic and orthotropic materials. © 1993.