The double cantilever sandwich beam(DCSB) specimen was used to study the temperature-dependent mode I fracture behavior of the interface between the ethylene propylene diene monomer(EPDM) films

the mode I fracture energy was determined by the linear elastic fracture mechanics(LEFM) method

then used simultaneously with the cohesive strength

which was obtained by uniaxial tension test as the parameter of a bilinear cohesive zone model(CZM) to simulate the fracture behavior of the DCSB specimen under different temperatures. Results showed that

there existed a large deviation between the test and simulation results

because the fracture energy determined by the uncorrected LEFM was not accurate. At last

by the means of adjusting the parameters of the CZM to make the simulation curves match the test curves better

the accurate mechanical property parameters were obtained

and the simulation result using these accurate properties matched well with test curve

proving the usability of this model to the fracture of the interface.