Influence of adhesive reinforcement on the model I fracture toughness of a bonded joint

摘要

The influence of adhesive reinforcement on the Mode I fracture toughness of a double cantilever beam specimen is investigated with a computer model based on a variational theorem that has been shown to accurately predict stress fields and energy release rates for cracked laminates. An axisymmetric damage plane strain model was developed and used to determine the energy release rates for midplane cracking in aluminum specimens and in aluminum bonded specimens with varying amounts adhesive reinforcement. The predicted energy release rates are compared to closed form analyses in a systematic test program.