Abstract: In order to deal with the issue of interface fracture including rubber material, a modified virtual crack closure technique was proposed, in which both material and geometric nonlinearities were considered through the method of step-by-step linearization. Firstly, the energy release rate was calculated on the crack tip of rubber specimens with double cracks. It can be seen through the comparison with existing papers that the modified virtual crack closure technique provided is of validity and efficiency. Then, an SLB model with a rubber sandwich was studied, the calculation of modeⅠand Ⅱcomponent of energy release rate indicates that the introduction of a rubber sandwich raises the total energy release rate and greatly increases the proportion of mode Ⅱcomponent. In the fractural analysis of joint-structures with multi-material system, energy release rates under different positions of delaminations were calculated, and the effect of dimension of outer fiber-reinforced composite upon the value of total energy release rate was considered. Finally, a fracture criterion for joint-structures with multi-material system was established.