Internal point torque in a two-phase material. Interface crack and inclusion problems

The Green's function for two perfectly-bonded elastic, orthotropic, homogeneous half spaces with different elastic constants under concentrated internal torque on the interface parallel to the two-phase boundary is obtained by means of the Hankel transform.

Use is made of the obtained solution to the analysis of the interface crack and inclusion problems. The dual-integral equations of both problems are solved exactly to generate results of engineering interest: the stress intensity factor of Mode III at the crack tip and the rotation of a rigid disk inclusion.

Numerical calculations are carried out and presented graphically to illustrate results of engineering interest.