Effects of UV light and moisture absorption on the impact resistance of three different carbon fiber-reinforced composites

dc.contributor.authorPatlolla, Vamsidhar Reddy
dc.contributor.authorGeorge, Jithin Mathew
dc.contributor.authorLoo, Soo-Han
dc.contributor.authorAsmatulu, Ramazan
dc.descriptionClick on the DOI link to access the article (may not be free).en_US
dc.description.abstractThe purpose of this research was to determine the influence of material properties on the impact response of a laminate, whereby specimens were fabricated and cured under a vacuum and high temperature using three types of pre-impregnated (prepreg), carbon fibers, namely unidirectional fiber, plain weave woven fiber, and non-crimp fiber (NCF). Each carbon fiber panel, usually known for its low-impact properties, of 16 plies underwent impact testing using a low velocity impactor and visual damage inspection by C-scan in order to measure the damage area and depth, before and after impact testing. These panels were treated with UV exposure and moisture conditioning for 20 days each. Water contact angles were taken into consideration to determine the hydrophobicity and hydrophillicity of the respective prepreg materials. Experimental results and damage analysis showed that UV exposure and moisture conditioning showcased the variation in impact response and behavior, such as load carrying capacity, absorbed energy, and impact energy of the carbon fiber panels. This study illustrates that non-crimp carbon fiber laminates were far more superior relative to load capacity than woven and unidirectional laminates, with the NCF-AS laminate exhibiting the highest load capacity of 17,244 1b/in (pre-UV) with only 0.89% decrease after UV exposure. This same laminate also had a 1.54% decrease in sustaining impact and 31.4% increase in wettability of the panel. Moreover, the study shows how symmetric and asymmetric stacking sequences affect the impact behavior of non-crimp fiber laminates. These results may be useful for expanding the capacity of carbon fiber, lowering costs, and growing new markets, thus turning carbon fiber into a viable commercial product.en_US
dc.identifier.citationPatlolla, Vamsidhar Reddy; George, Jithin Mathew; Loo, Soo-Han; Asmatulu, Ramazan. 2015. Effects of UV light and moisture absorption on the impact resistance of three different carbon fiber-reinforced composites. ASME 2014 International Mechanical Engineering Congress and Exposition Volume 1: Advances in Aerospace Technology Montreal, Quebec, Canada, November 14–20, 2014en_US
dc.publisherAmerican Society of Mechanical Engineersen_US
dc.relation.ispartofseriesASME 2014 International Mechanical Engineering Congress and Exposition;v.1
dc.rights.holderCopyright © 2014 by ASMEen_US
dc.subjectImpact testingen_US
dc.subjectNon-crimp fiberen_US
dc.subjectUV exposureen_US
dc.subjectMoisture conditioningen_US
dc.titleEffects of UV light and moisture absorption on the impact resistance of three different carbon fiber-reinforced compositesen_US
dc.typeConference paperen_US
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