Provides a through and systematic discussion on the functionally graded adhesive and its joints Discusses analytical modelling and numerical analyses of the joints Details 3D stress and failure delamination analysis for composite analyses of functionally graded out-of-plane joints under various combinations of loading Illustrates FE Modeling and simulation of interfacial failure and damage propagation in out-of-plane joints Includes effect of various gradation function profiles on damage growth driving forces (SERR)