한국기계가공학회지, 제19권, 제12호, pp. 87~97(2020.12) ISSN 1598-6721(Print) Journal of the Korean Society of Manufacturing Process Engineers, Vol. 19, No. 12, pp. 87~97(2020.12)ISSN 2288-0771(Online)  https://doi.org/10.14775/ksmpe.2020.19.12.087 Copyright The Korean Society of Manufacturing Process Engineers. This is an Open-Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 License (CC BY-NC 3.0 http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 서 론 1. 최초의 는 년대 FRP(Fiber Reinforced Plastic) 1930 영국의 에 의해 상업적으로 개 Norman de Bruyne 발되어 항공 산업에서 관심을 모았다 우리나라에 . 서 의 역사는 년대 제 차 경제개발 개년 FRP 1960 1 5 계획 기간 중에 선을 건조하는 업체가 개사 FRP 5 로서 명확치는 않으나 역사의 시초로 판단되 FRP 며, 최초의 재료의 등록은 년 월 FRP 1978 1 CCP 경화형 복합재료의 진공압에 따른 UV 기계적 경화 특성 분석 장용수 김정근 , 고선호 , 김홍건 , 곽이구 , ,# * 전주대학교 탄소융합공학과, ** 전주대학교 탄소연구소, *** 전주대학교 기계자동차공학과 Analysis of Mechanical Curing Properties Based on Vacuum Pressure of UV-Cured Composites Yong-Soo Jang * , Jeong-Keun Kim * , Sun-Ho Go ** , Hong-Gun Kim *,*** , Lee-Ku Kwac *,***,# * Department of Carbon Convergence Engineering, JEONJU UNIV., ** JEONJU UNIV. Institute of Carbon Tech., *** Department of Mechanical and Automotive Engineering, JEONJU UNIV. (Received 04 September 2020; received in revised form 14 September 2020; accepted 15 September 2020) ABSTRACT In this study, a UV-cured GFRP molding is made using a combination of hand lay-up and resin transfer molding, and its properties are analyzed. The molded plates produced using various vacuum pressures (0 mmHg, 450 mmHg, and 760 mmHg) are examined via a comparison of hand lay-up molding and resin − − transfer molding. Tests are conducted by processing tensile specimens (ASTM D-5083), flexural test specimens (ASTM D-790), and ILSS test specimens (ASTM D-2344) according to each ASTM standard with a molded plate. Similarly, the UV-cured GFRP molding is compared against GFRP using epoxy. It was confirmed that the mechanical strengths of all the specimens increased when the vacuum pressure was increased and when UV curing was applied. This is believed to be because as the vacuum pressure increases, the pores of the cured specimen are removed, thereby reducing defects, and the bonding force between the glass fiber and the resin is stronger than that of the epoxy resin. It is expected that if resin transfer molding methods and UV-cured resins are used for molding GFRP composites in industry, products with better mechanical properties and faster curing time will be produced. Key Words : 수적층 수지 이송 성형 인장 강도 Hand Lay-up( ), Resin Transfer Molding( ), Tensile Strength( ), 굴곡 강도 층간 전단 강도 Flexural Strength( ), ILSS( ) # Corresponding Author : kwac29@jj.ac.kr Tel: +82-63-220-3063, Fax: +82-63-220-3161 - 87 -