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경량화용 혼성 알루미늄 CFRP 사각튜브의 축 압궤특성
이길성(K. S. Lee),차천석(C.S. Cha),정진오(J.O. Chung),양인영(I. Y. Yang) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Aluminum and CFRP tube is light-weight material representatively but collapse mechanism is different under axial loading. Aluminum tube absorbs energy by stable plastic deformation under axial loading. While CFRP(Carbon Fiber Rein forced Plastics) tube absorbs energy by unstable brittle failure but its specific strength and stiffness is higher than that of aluminum tube. In this study, for complement of detect and synergy effect by combination with the advantages of each member, the axial collapse tests were performed for combined aluminum CFRP tubes which are composed of aluminum tubes wrapped with CFRP outside aluminum square tubes. Collapse characteristics were analyzed for combined square tubes which have different CFRP orientation angle and thickness. Test results were compared with that of aluminum tubes and CFRP tubes.
차체 경량화를 위한 CFRP 복합구조부재의 충격압궤모드에 관한 연구
황우채 ( W C Hwang ),최영민 ( Y M Choi ),임광희 ( K H Im ),차천석 ( C S Cha ),양용준 ( Y J Yang ),양인영 ( L Y Yang ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.5
This study aimed to develop members with the optimum impact characteristics to ensure a protected space for passengers inthe case of automobile collisions. Accordingly, these members were fabricated to provide sufficient rigidity and safety to the passengerroom structure and to absorb large amounts of energy during collision. In particular, CFRP members were fabricated with differentsection shapes such as square and single- and double-hat shapes. Next, their impact collapse characteristics and collapse modes werequantitatively analyzed according to the changes in section shapes and stacking angles. This analysis was performed to obtain designdata that can be applied in the development of optimum lightweight members for automobiles.
충격에너지와 적층조건에 따른 CFRP원형부재의 충격특성
최주호(J.H Choi),나승우(S.W Ra),차천석(C.S Cha),김지훈(J.H Kim),양인영(I.Y Yang) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
The CFRP(Carbon Fiber Reinforced Plastics) Circular members were made of 8ply unidirectional prepreg sheets stacked at different angles (15°,45°and 90°) and interface numbers (2, 4 and 6). CFRP is an anisotropic material which is the most widely adapted lightweight structural member. In this study, the impact energy at the crosshead speed of 5.52m/s, 5.14m/s and 4.57m/s are 611.52J, 529.2J and 419.44J. Based on the collapse characteristics of CFRP member, the collapse characteristics and energy absorption capability were analyzed. The purpose is to examine experimentally absorption behavior and strength evaluation depending on changes in the stacking configuration when the CFRP circular member with different stacking configuration is exposed to separate impact velocity in addition, considered the dynamic characteristics.