DOI: 10.5176/2251-1857_M312.23
Authors: Mubarak Ali, Sunil C. Joshi
Abstract: This electronic Glass fiber reinforced polymer (GFRP) laminates are susceptible to damage initiation and growth when subjected to impact loads. There are many sources of low velocity impact loading to composites and they frequently occur at various stages of product life cycle. The laminated structure of composites inherits weak interfaces, which further aggravate the effect of impact. The damages evolved and bounded within the laminates are barely visible and difficult to detect. Design and development of a composite lay-up with increased impact toughness could be one of the best strategies to mitigate impact damages to laminates. In the present study, modified GFRP laminates were developed with core shell polymer (CSP) particles dispersed within the inter-ply interfaces. These particles were added in within the selective ply interfaces of typical eight-ply, woven glass/epoxy composite laminates during their fabrication. The effects of incorporating these particles on the impact perforation response of the cured GFRP laminates are investigated. The test findings and the characterization of the impact damages done to analyze the damage modes are presented in this paper. It is concluded that the CSP particles toughen the matrix within the inter-ply interfaces in composite laminates thereby enhancing the overall impact perforation resistance. Possible underlying mechanisms leading to the enhanced impact performance of the laminates are identified and discussed.
Keywords: Impact damage; Core shell polymer (CSP) particles; Impact perforation; Modified interface
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