Laser-Induced Thermoelastic Wave Technique to Evaluate Hygrothermal Aging in CFRP Composites

Bagale, NC and Bhat, MR (2021) Laser-Induced Thermoelastic Wave Technique to Evaluate Hygrothermal Aging in CFRP Composites. In: Materials Evaluation, 79 (1). pp. 55-60.

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Abstract

The interaction of heat and moisture with fiber-reinforced polymer composites over a long duration is known to cause physical and mechanical degradation. In this paper, an attempt was made to evaluate physical and mechanical changes in carbon fiber�reinforced polymer (CFRP) by an unconventional nondestructive approach before and after varied duration of exposures to hygrothermal (HT) treatment at an elevated temperature (80 °C/353 K) up to 800 h. As a novel approach, laser-induced thermoelastic waves were utilized for characterization of the material. Wave characteristics, such as wave amplitude and velocity of propagation, were studied over different duration exposures of HT treatment to detect and quantify HT-induced property changes in the material. Results show that the aging effect attenuated the wave to a factor of 2.75 and significantly reduced the velocity of wave propagation by 20 compared to that of the pristine material, revealing the degradation in the material caused by HT exposure. The proposed methodology has the potential to monitor the health of fiber-reinforced polymer composite structures that have undergone hygrothermal aging. ©2021 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 American Society for Nondestructive Testing.
Keywords:	Carbon fiber reinforced plastics; Carbon fibers; Elastic waves; Thermoelasticity, moisture; Carbon fiber reinforced polymer composite; Carbon fibre reinforced polymer; Carbon/polymer composites; Fiber reinforced polymer composites; Hygrothermal; Hygrothermal ageing; Laser induced; Long duration; Thermoelastic waves, Wave propagation
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	10 Oct 2024 13:27
Last Modified:	10 Oct 2024 13:27
URI:	http://eprints.iisc.ac.in/id/eprint/86452

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