DYNAMIC SHEAR STRENGHT CHARACTERIZATION OF ADHESIVE LAP JOINT UNDER DYNAMIC COMPRESSION USING SPLIT HOPKINSON PRESSURE BAR (SHPB) ON AL-6063 T6 ALLOY

Abstract

The use of adhesive joints is continuously increasing in automotive, aerospace and structural applications as compared to the bolted joints because of their low cost, manufacturing flexibility and performance. An important feature of any vehicle structure is its behavior during high loading rates so it is important to understand the dynamic behavior of adhesive joints under impact loading. Al 6063 T6 specimen geometry was made to evaluate the static and dynamic shear strength of the adhesive lap joints. The spectro analysis of specimen was done and weight percentage of the composition was obtained. The dynamic compression experiments were performed by using Split Hopkinson Pressure Bar (SHPB) setup. The static shear strength was evaluated and its variation with adhesive thickness was studied. The result indicates that the static shear strength decreases with increase in adhesive thickness. The specimens were loaded dynamically on the SHPB setup and the dynamic shear strength was evaluated by varying adhesive thickness, adhesive bonded area and pressure. The results indicate that the dynamic shear strength increases up to an optimum area thereafter it decreases. While with increase in adhesive thickness, the dynamic shear strength decreases. With increase in pressure the dynamic shear strength increases.