Numerical study of lap joints with composite adhesives and composite adherends subjected to in-plane and transverse loads |
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| Authors: | S.M.R. Khalili S. Khalili M.R. Pirouzhashemi A. Shokuhfar R.K. Mittal |
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| Affiliation: | aDepartment of Mechanical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran;bDepartment of Materials Science, Science and Research Branch, Islamic Azad University, Tehran, Iran;cDepartment of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran;dDepartment of Applied Mechanics, I.I.T. Delhi, New Delhi, India |
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| Abstract: | In this paper, single lap joints for joining fibre composites were modeled and a three-dimensional finite element method was used to study the joint strength under in-plane tensile and out-of-plane loadings. The behaviour of all the members was assumed to be linear elastic. The adherends were considered to be orthotropic materials while the adhesive could be neat resin or reinforced one. The largest values of shear and peel stresses occurred near the ends of the adhesive region, as expected. The values and the rate of variation in peel stress was more than that of shear stress. By changing the properties and behaviour of adhesive from neat epoxy (isotropic) to fibre composite adhesive (orthotropic) and with various fibre volume fractions of glass fibre, the ultimate bond strength increased as the fibre volume fraction increased, in both tensile and transverse loadings. Also, changing the orientation of fibres in the adhesive region with respect to the global axes influenced the bond strength. |
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| Keywords: | B. Composites C. Finite element stress analysis Lap joints |
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