9. Mode II Debonding Characterization of Adhesively Bonded Aluminum Joints

Adhesive joints as versatile methods offer several advantages, including eliminating galvanic corrosion for metallic adherents and overall weight saving. This work's goal is to establish a systematic methodology for determining the strain rate-dependent interface properties of adhesively bonded joints loaded in mode II. Double lap joints consisting of aluminum Al 6061-T6 bonded with polymer adhesive were used to investigate the delamination failure process. The strain rate-dependent interface properties were determined based on hybrid experimental and computational approaches. Both experiments and finite element simulations were conducted at displacement rates of 5, 50, and 500 mm/min using an end-notch flexure specimen. The strain rate-dependent interface strength properties were verified based on the finite element simulation results. The experimental and simulated mode II load–displacement curves showed promising findings and correlation. Hence, establishing a validated methodology fulfills the industrial requirement of an accurate predictive model with a minimum number of testing and material property data.