Interaction of a system of cracks with an interface crack in functionally graded/homogeneous bimaterials under thermo-mechanical loading

► An interface crack interacts with microcracks in FGM/homogeneous bimaterials. ► The bimaterial is subjected to a thermal flux and tension. ► Analytical formulae for stress intensity factors (SIFs) are obtained. ► Inhomogeneity parameters of FGMs notably affect SIFs for the interface crack.