Effect of shear deformation on interfacial stresses in plated beams subjected to arbitrary loading

Narayanamurthy, V and Chen, JF and Cairns, J and Ramaswamy, A (2011) Effect of shear deformation on interfacial stresses in plated beams subjected to arbitrary loading. In: International Journal of Adhesion and Adhesives, 31 (8). pp. 862-874.

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Abstract

Bonding a fibre reinforced polymer (FRP) composite or metallic plate to the soffit of a reinforced concrete (RC), timber or metallic beam can significantly increase its strength and other aspects of structural performance. These hybrid beams are often found to fail due to premature debonding of the plate from the original beam in a brittle manner. This has led to the development of many analytical solutions over the last two decades to quantify the interfacial shear and normal stresses between the adherends. The adherends are subjected to axial, bending and shear deformations. However, most analytical solutions have neglected the influence of shear deformation of the adherends. For the few solutions which consider this effect in an approximate manner, their applicability is limited to one or two specific load cases. This paper presents a general analytical solution for the interfacial stresses in plated beams under an arbitrary loading with the shear deformation of the adherends duly considered. The shear stress distribution is assumed to be parabolic through the depth of the adherends in predicting the interfacial shear stress and Timoshenko's beam theory is adopted in predicting interfacial normal stress to account for the shear deformation. The solution is applicable to a beam of arbitrary prismatic cross-section bonded symmetrically or asymmetrically with a thin or thick plate, both having linear elastic material properties. The effect of shear deformation is illustrated through an example beam. The influence of material and geometric parameters of the adherends and adhesive on the interfacial stress concentrations at the plate end is discussed. (C) 2011 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	International Journal of Adhesion and Adhesives
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Plated beam;Shear deformation;Interfacial stress;Closed-form solution;FRP composites;Strengthening
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	21 Dec 2011 09:12
Last Modified:	21 Dec 2011 09:12
URI:	http://eprints.iisc.ac.in/id/eprint/42596

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