TORSION OF COMPOSITE CYLINDER CONTAINING CRACK TERMINATING AT BIMATERIAL INTERFACE

Considered in this paper is the Saint-Venant's torsion of a cylinder c ontaining a dissimilar circular bar and a slanted crack. The authors g ave a warping function that satisfies automatically the interface bond ed condition, and reduced the torsional problem to a pair of mixed-typ e integral equations that could be evaluated numerically. The nature o f stress singularity for a slanted crack terminating at the interface is studied, and it is shown that the power of singularity is not -0.5 at the interface tip of a crack. The expressions of singular stress ar ound this tip are derived. For two typical composite cylinders, some n umerical results giving mode III stress intensity factors, singular st resses, and torsional rigidities are presented.