AUTHORS: Sun-Ho Go, Seong-Min Yun, Min-Sang Lee, Jang-Ho Lee, Lee-Ku Kwac, Hong-Gun Kim

Download as PDF

ABSTRACT: Carbon fiber reinforced Plastics (CFRP) composite materials have excellent mechanical characteristics such as specific strength, specific stiffness, and corrosion resistance. However, the greatest disadvantage for the application of CFRP is its weakness to impact. When CFRP is applied to members of structures that require safety of people such as airplanes and automobiles, they can receive impact damage by colliding with various types of materials such as small stones or fragments. The mechanical strength can be improved by polymer lamination during molding to enhance the impact strength and flexibility of the brittle carbon fiber composite materials. Hence, the mechanical strength was analyzed by varying the lamination method and the lamination ratios of CFRP and ethylene vinyl acetate(EVA). In this study, tensile test was performed according to the test specifications and method specified in the ASTM standard at different lamination ratio and method of CFRP and EVA (Ethylene Vinyl Acetate) sheets. That shows excellent characteristics in the flexibility of crack resistance to analyze the mechanical characteristics of the CFRP/EVA hybrid material and the existence of defects in the combination between CFRP and EVA. Tensile tests and 3 point bending tests were performed to determine the mechanical strength

KEYWORDS: Carbon Fiber Reinforced Plastics, Ethylene Vinyl Acetate, Tensile test, Scanning Electron Microscope, Toughness, Elasticity Modulus

REFERENCES:

[1] Kim T,H,. A Study on High-flexible Carbon Fiber Composite Material Applied with Macromolecular Polymer. Master’s degree dissertation, Jeonju University, Korea, 2016

[2] Lee T.H., Kil S.C., Status of the recent applications of carbon fiber. Korea Institute of Military Science and Technology. 2012; vol.15, No.4:492-501

[3] Yang G.S., et al. Application handbook of carbon materials. Dae young sa; 2008

[4] Jo Y.J. A study on the penetration characteristics of carbon fiber reinforced composite laminate shells. Master’s degree, University of Chosun, Korea

[5] Go S.H., Kim H.G., Shin H.J., Lee M.S., Yoon H.G., Kwac L.K., The impart fracture behaviors of CFRP/EVA composites by drop-weight impact test. Carbon letters, Vol.21, pp.23-32, 2017

[6] Yoon H.K., A Study on Impact Resistance and Thermal Properties of Carbon Fiber Composite Material Applied with EVA. Master’s degree dissertation, Jeonju University, Korea, 2016

[7] Go S.H., Analysis of mechanical properties for laminating method in carbon fiber reinforced plastics, Master’s degree dissertation, Jeonju University, Korea, 2014

[8] Shin H.J., A Study on the mechanical and thermal characteristics analysis for thermal stress analysis of carbon composite, Doctor’s degree dissertation, Jeonju University, Korea, 2016

[9] Shin H.J., The strength evaluation and nondestructive testing of carbon fiber composites, Master’s degree dissertation, jeonju University, Korea, 2013