EVALUATION OF INFLUENCE OF SURFACE ROUGHNESS ORIENTATION IN CFRP LAP JOINTS USING AE AND DIC

Mane, LS and Bhat, MR (2023) EVALUATION OF INFLUENCE OF SURFACE ROUGHNESS ORIENTATION IN CFRP LAP JOINTS USING AE AND DIC. In: Materials Evaluation, 81 (6). pp. 43-51.

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Abstract

This paper investigates the effects of emery abraded surface roughness orientation on the shear strength of the carbon fiber reinforced polymer (CFRP) single lap joint (SLJ). For this purpose, three roughness patterns of angles 0°, 45°, and 90° with the longitudinal axis of adherend were considered in the overlap area of the SLJ. The surface roughness was characterized by contact-based roughness measurement and contact angle between the water droplet and the adherend surface. Through-thethickness full-strain field measurement was carried out during shear strength tests using digital image correlation (DIC). The peel and shear stress at the overlap end were highest in the 90° coupons and least in 0° coupons. Acoustic emission testing (AE) was carried out during the shear strength testing of the SLJ. The investigation proves that the surface roughness orientation at the interface of bonded joints affects the acoustic emissions generated. AE hits and amplitude parameter distribution was found to change with the change in orientation. AE hits were more in 90° samples and least in 0° samples. © 2023 American Society for Nondestructive Testing.

Item Type:	Journal Article
Publication:	Materials Evaluation
Publisher:	American Society for Nondestructive Testing
Additional Information:	The copyright for this article belongs to the publisher.
Keywords:	Acoustic emission testing; Adhesive joints; Carbon fiber reinforced plastics; Contact angle; Image correlation; Shear flow; Shear strength; Shear stress; Strain measurement, Adherends; Carbon fibre reinforced polymer; Digital image correlations; Lap joint; Longitudinal axis; Roughness orientation; Roughness patterns; Shears strength; Single lap joints; Stresses distribution, Surface roughness
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	19 Oct 2024 07:56
Last Modified:	19 Oct 2024 07:56
URI:	http://eprints.iisc.ac.in/id/eprint/86421

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