Prospects and challenges of nanomaterial engineered prepregs for improving interlaminar properties of laminated composit
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Prospective Article
Prospects and challenges of nanomaterial engineered prepregs for improving interlaminar properties of laminated composites––a review A.B.M. Iftekharul Islam and Ajit D. Kelkar, Department of Nanoengineering, JSNN, North Carolina A&T State University, 2907 E Gate City Blvd, Greensboro, NC-27401, USA Address all correspondence to A.D. Kelkar at [email protected] (Received 12 January 2017; accepted 6 March 2017)
Abstract In the recent years, several investigators are incorporating nanotechnology, one of the most powerful trendsetters in material research, to conventional polymer prepregs to enhance mechanical properties of composite strucutures. The current paper outlines the role of nanotechnology in reinforcing resin and challenges for fabricating nanomaterial reinforced prepregs. As delamination is the most critical problem for composite materials, the current study only focuses the application nanotechnology as a possible solution to alleviate delamination problems in laminated composites. The importance of nanoengineered prepregs is discussed in a viewpoint of improvement in interlaminar properties of the laminated composite materials.
Introduction For the past three decades use of lightweight composite materials in aerospace, automotive, and for alternate energy applications like wind turbine blades has increased dramatically. However, composite structures fabricated by using prepregs either autoclave or out of autoclave manufacturing technique, is not an easy task and usually involves complicated temperature and/or pressure control. Moreover, most of the prepreg manufacturing process involves resin impregnation into the fiber preform. Improper impregnation of resin causes void, resin-rich areas and may affect the performance of the composite structure significantly. Typically, complicated composite structures are manufactured using prepregs and involves very little joining or machining and most of the times results into near neat shape components. Prepregs are usually considered as the best manufacturing option for high-performance polymer composite structures compared with other manufacturing processes like vacuum assisted resin transfer molding etc. The fiber content achievable using composite prepreg is typically very high and is around 65% and void content is typically
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