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Open AccessArticle

Correlation between Drop Impact Energy and Residual Compressive Strength According to the Lamination of CFRP with EVA Sheets

1
Department of Mechanical Engineering, Graduate School, Jeonju University, Jeonju-si 55069, Korea
2
Department of Carbon Fusion Engineering, Graduate School, Jeonju University, Jeonju-si 55069, Korea
3
Department of Automotive Engineering, Jeonju University, Jeonju-si 55069, Korea
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(1), 224; https://doi.org/10.3390/polym12010224
Received: 17 December 2019 / Revised: 9 January 2020 / Accepted: 13 January 2020 / Published: 16 January 2020
(This article belongs to the Special Issue Multiphase Structure of Polymeric Materials and Physical Properties)
Carbon-fiber-reinforced plastic is an important building material; however, its application is limited because of its brittleness, leading to vulnerability under shock. Thus, the strength performance of carbon-fiber-reinforced plastics needs to be improved. Here, the drop impact test was conducted to analyze the impact energy and fracture characteristics of carbon-fiber-reinforced plastics and ethylene vinyl acetate sheets. The compression after impact test was performed to assess the residual compressive strength. The thermal energy generated was measured as change in temperature at the time of fracture to investigate the relationship between thermal and mechanical properties. The impact absorption efficiency of 100% was achieved when the carbon-fiber-reinforced plastics specimen was laminated with four or more sheets of ethylene vinyl acetate. The thermal energy generated during impact, the impact load, and the compression after impact test strength was reduced with the increasing number of laminated ethylene vinyl acetate layers. Our results showed that, by carefully selecting the optimal conditions of fabricating the carbon-fiber-reinforced plastic/ethylene vinyl acetate composites, carbon composite materials can be used for impact mitigation.
Keywords: carbon-fiber-reinforced plastic; building materials; impact; ethylene vinyl acetate carbon-fiber-reinforced plastic; building materials; impact; ethylene vinyl acetate
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MDPI and ACS Style

Go, S.-H.; Lee, M.-S.; Hong, C.-G.; Kwac, L.-K.; Kim, H.-G. Correlation between Drop Impact Energy and Residual Compressive Strength According to the Lamination of CFRP with EVA Sheets. Polymers 2020, 12, 224.

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