Interfacial shear stress distribution in the adhesively bonded tubular joints under tension with a circumferential void or debond
Mohammad Shishesaz, Siavash Tehrani
Abstract
Present work studies the interfacial stresses in tubular single-lap adhesively bonded joints, in the presence of an annular defect (void and debond), subjected to an axial load. Using linear elasticity theory, the governing equations are derived using a quadratic displacement along the adhesive thickness. Additionally, the geometric dimensions of the tubes (adherends), as well as their mechanical properties, were allowed to differ from each other. The semi-analytical solution was obtained with the help of MATLAB software program. Moreover, a finite element model was developed to verify the semi-analytical results. Very good agreements were observed between the results of both methods. Results show that any increase in Young’s modulus of the adhesive layer has a direct effect on the interfacial shear stress between the adhesive and adherends (tubes). However, the opposite is true for any rise in Young’s modulus of the adherends. Moreover, results indicate that the presence of a void or a debond in the overlap region can cause an increase in the interfacial shear stress. This increase depends on the length and location of the defect. Opposed to a near-edge void, for a near edge debond, the peak interfacial shear stress (τ1)max occurs at the beginning of the debond region, instead of the overlap left end.