Non-destructive evaluation of porosity and its effect on mechanical properties of carbon fiber reinforced polymer composite materials

Bhat, MR and Binoy, MP and Surya, NM and Murthy, CRL and Engelbart, RW (2012) Non-destructive evaluation of porosity and its effect on mechanical properties of carbon fiber reinforced polymer composite materials. In: REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION: Volume 31, 17–22 July 2011 , Burlington, VT , pp. 1080-1087.

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Abstract

In this work, an attempt is made to induce porosity of varied levels in carbon fiber reinforced epoxy based polymer composite laminates fabricated using prepregs by varying the fabrication parameters such as applied vacuum, autoclave pressure and curing temperature. Different NDE tools have been utilized to evaluate the porosity content and correlate with measurable parameters of different NDE techniques. Primarily, ultrasonic imaging and real time digital X-ray imaging have been tried to obtain a measurable parameter which can represent or reflect the amount of porosity contained in the composite laminate. Also, effect of varied porosity content on mechanical properties of the CFRP composite materials is investigated through a series of experimental investigations. The outcome of the experimental approach has yielded interesting and encouraging trend as a first step towards developing an NDE tool for quantification of effect of varied porosity in the polymer composite materials.

Item Type:	Conference Proceedings
Series.:	AIP Conference Proceedings
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to the American Institute of Physics.
Keywords:	NDE;Ultrasonics;Porosity;CFRP Composites
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	04 Dec 2012 14:59
Last Modified:	04 Dec 2012 14:59
URI:	http://eprints.iisc.ac.in/id/eprint/45111

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