Shear testing of thick adhesive layers using the ENF-specimen

摘要: Abstract An existing experimental method to determine cohesive laws for adhesive layers loaded in shear is further developed. The based on differentiation of the energy release rate (ERR) with respect deformation at crack tip. test geometry used an ENF-specimen which adherends are assumed deform linearly elastic. original expanded account situations where thickness layer not negligible as compared adherend thickness. To this end, a novel mathematical expression derived. No assumptions form law made; it implicitly included derivation. ERR contains applied load and initial position tip, addition geometrical properties elastic modulus material. Numerical simulations performed verify accuracy ERR. Preliminary results from experiments epoxy presented. extracted by using blunted Verifying confirm that local pre-fracture behavior accurately captured.