NDLI: Effects of UV Light and Moisture Absorption on the Impact Resistance of Three Different Carbon Fiber-Reinforced Composites

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Patlolla, V. George, J. Loo, Soo-Han Asmatulu, R.
Copyright Year	2014
Abstract	The 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 lb/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.
File Format	PDF
ISBN	9780791846421
DOI	10.1115/IMECE2014-39999
Volume Number	Volume 1: Advances in Aerospace Technology
Conference Proceedings	ASME 2014 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2014-11-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Water Fiber reinforced composites Inspection High temperature Hydrophobicity Laminates Carbon Stress Fibers Load bearing capacity Ultraviolet radiation Carbon fibers Absorption Vacuum Materials properties Impact testing Damage
Content Type	Text
Resource Type	Article

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