Single and dual adhesive bond strength analysis of single lap joint between dissimilar adherends

Jairaja, R and Naik, G Narayana (2019) Single and dual adhesive bond strength analysis of single lap joint between dissimilar adherends. In: INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, 92 . pp. 142-153.

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Abstract

The emerging trends for joining of aircraft structural parts made up of different materials are essential for structural optimization. Adhesively bonded joints are widely used in the aircraft structural constructions for joining of the similar and dissimilar materials. The bond strength mainly depends on the type of adhesive and its properties. Dual adhesive bonded single lap joint concept is preferred where there is large difference in properties of the two dissimilar adherends and demanding environmental conditions. In this work, Araldite-2015 ductile and AV138 brittle adhesives have been used separately between the dissimilar adherends such as, CFRP and aluminium adherends. In the dual adhesive case, the ductile adhesive Araldite-2015 has been used at the ends of the overlap because of high shear and peel strength, whereas in the middle of the bonded region the brittle adhesive AV138 has been used at different dimensions. The bond strength and corresponding failure patterns have been evaluated. The Digital Image Correlation (DIC) method has been used to monitor the relative displacements between the dissimilar adherends. Finite element analysis (FEA) has been carried-out using ABAQUS software. The variation of peel and shear stresses along the single and dual adhesive bond length have been captured. Comparison of experimental and numerical studies have been carried-out and the results of numerical values are closely matching with the experimental values. From the studies it is found that, the use of dual adhesive helps in increasing the bond strength.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
Publisher:	ELSEVIER SCI LTD
Additional Information:	copyright for this article belongs to ELSEVIER SCI LTD
Keywords:	Adhesively bonded Joint; Composite materials; Finite element analysis; Digital image correlation; Single lap joint
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	13 Sep 2019 09:09
Last Modified:	13 Sep 2019 09:09
URI:	http://eprints.iisc.ac.in/id/eprint/63176

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