Abstract

Cohesive failure, energy absorption, and post-load-bearing capacity of the adhesive bonded lap joints were studied through experimental–numerical comparative analysis under four different temperatures (-30 °C, room temperature (RT), 50 °C, and 80 °C) and four different transverse impact (parallel to the normal direction of the bonded surfaces) energies (4, 8, 12, and 16 J). A bilinear cohesive zone model was used for simulations, DIC (digital image correction) based DCB and ENF tests were conducted to obtain load-displacement curves, and then, R-curves as well as the cohesive laws of the bonded joints were induced through the direct modeling method. The CZM based simulation results showed good agreement with the experimental results on both the impact damage and post-load-bearing capacity of the adhesive joints and showed that both the absorbed energy and maximum post-bearing load did not significantly change with increasing temperature except at 80 °C, which is near the glass-transition temperature (Tg).

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