Strengthening of the adhesive bond using a mixture of adhesives between dissimilar adherends in a single lap joint

Jairaja, R and Naik, Narayana G (2019) Strengthening of the adhesive bond using a mixture of adhesives between dissimilar adherends in a single lap joint. In: JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY .

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Abstract

Adhesive bonding is the best alternative to riveting in aircraft structures but the strength of the adhesive bonded joint is low and is limited by strength of adhesive. Strengthening of adhesive bonding is an important requirement. In this work, an attempt has been made to strengthen the adhesive bonding by mixing different quantities of brittle adhesive in the ductile adhesive and vice-versa. Two different adhesives, one brittle (AV138) and another ductile (Araldite-2015) adhesive have been considered. Initially single lap joint has been constructed between the CFRP and aluminium with individual adhesives, then the mixture of adhesives have been used in the bonded region in varied proportions. The X-ray radiography and ultrasonic testing have been performed to check the quality of bonding. Uniaxial tensile tests have been conducted on the lap joints along with Digital Image Correlations (DIC) to obtain the individual and mixed adhesive bond strength. The failure patterns have been identified using optical and scanning electron microscope. These studies indicate that strengthening of the adhesive bonding achieved by mixing of two adhesives and highest bond strength obtained when the mixture of AV138 and Araldite-2015 adhesives are used in equal proportions.

Item Type:	Journal Article
Publication:	JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
Publisher:	TAYLOR & FRANCIS LTD
Additional Information:	Copyright of write article belongs to TAYLOR & FRANCIS LTD
Keywords:	Author Keywords:Adhesive bond; composite materials; digital image correlations; mixed adhesive KeyWords Plus:DIGITAL IMAGE CORRELATION; PERFORMANCE
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	31 Dec 2019 09:33
Last Modified:	31 Dec 2019 09:33
URI:	http://eprints.iisc.ac.in/id/eprint/63826

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