THE R(-1 2) (IN-R) SINGULARITIES AT INTERFACE CRACKS IN MONOCLINIC AND ISOTROPIC BIMATERIALS DUE TO HEAT-FLOW/

It is known that the stress singularities at an interface crack tip of bimaterials with the effects of heat flow may have the form r-1/2 (ln r). The existence conditions of the higher order singularitiy r-1/2 ( ln r) are studied for monoclinic bimaterials whose plane of symmetry i s at x3 = 0. It is shown that the higher order singularity does not ex ist if the bimaterial is mismatched. If the bimaterial is non-mismatch ed, the higher order singularity does not exist when a certain conditi on is satisfied. This condition is given explicitly for monoclinic bim aterials with the plane of symmetry of x3 = 0 and in a simple form for isotropic bimaterials.