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차량 경량화용 CFRP 이중모자형 단면부재의 계면수 변화에 따른 에너지흡수 특성
양인영(Inyoung Yang),차천석(Cheonseok Cha),편석범(Seokbeom Pyeon),황우채(Woochae Hwang) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
CFRP (Carbon Fiber Reinforced Plastics) of the advanced composite materials as structure materials for vehicles has a widely application in lightweight structural materials of air planes, ships and automobiles because of high strength and stiffness. the In this study, CFRP double hat-shaped section members was manufactured. The static collapse tests performed with change of the stacking condition, such as interface numbers. The collapse mode and energy absorption capability were analyzed.
CFRP 이중 모자형 단면부재의 계면수 변화에 따른 충격압궤거동 평가
황우채(Woochae Hwang),차천석(Cheonseok Cha),양인영(Inyoung Yang) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This study is to experimental investigations are carried out for CFRP double hat shaped section members in order to study the effect of various stacking condition and shape of section. Impact collapse tests were performed with change of the stacking condition, such as fiber orientation angle and shape of section. Collapse mode and energy absorption characteristics were analyzed. The CFRP double hat shaped section members which manufactured from unidirectional prepreg sheets were made of 8ply. The collapse mode and energy absorption characteristics were analyzed for CFRP double hat shaped section member according to the interface numbers(2, 3, 4, 6 and 7) and outerlayer(90°, 0°)
경량화용 CFRP 모자형 단면 부재의 충돌 압췌특성에 관한 연구
황우채(Woochae Hwang),차천석(Cheonseok Cha),양인영(Inyoung Yang) 한국자동차공학회 2008 한국자동차공학회 지부 학술대회 논문집 Vol.2008 No.11
Currently, the most important purpose in designing automobile is environment-friendly and safety performance aspect. However, the vehicle structure must be lightweight in order to improve fuel efficiency and reducing exhaust fumes. Therefore, the design of automobile should be inclined towards the safety aspects. but at the same time, it also consider reducing the structural weight of an automobile. In this study, CFRP side members with hat-shaped section was manufactured. The impact collapse tests performed with change of the stacking condition, such as interlaminar. The collapse mode and energy absorption capability were analyzed according to interlaminar number.
충진된 폼의 밀도에 따른 CFRP 원형부재의 에너지 흡수특성
최주호(Juho Choi),차천석(Cheonseok Cha),정종안(Jongahn Jung),양인영(Inyoung Yang) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, one type of circular shaped composite tube was used, combined with reinforcing foam and without foam. Furthermore, CFRP(Carbon Fiber Reinforced Plastic) circular member manufactured from CFRP prepreg sheet for lightweight design. CFRP is an anisotropic material which is the most widely adapted lightweight structural member. The crashworthy behavior of circular composite material tubes subjected to static axial compression under same condition is reported in this paper. Test was executed in order to compare the results to the energy absorption and collapse shape. The collapse mode during the failure process were observed and analyzes. The behavior of polymetric foams to the tubes crashworthiness were also investigated.
혼성 알루미늄 CFRP 원형튜브의 축 압궤거동과 에너지흡수 특성
이길성(Kilsung Lee),차천석(Cheonseok Cha),정진오(Jinoh Chung),양인영(Inyoung Yang) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Aluminum tube absorbs energy by stable plastic deformation under axial loading. While CFRP(Carbon Fiber Reinforced 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 circular tubes. Test results were compared with that of aluminum tubes and CFRP tubes. Crushing behavior and energy absorption characteristics were analyzed for combined circular tubes which have different CFRP orientation angle and thickness.
경량화용 Al/CFRP 사각부재의 적층각에 따른 충격압궤특성
이길성(Kilsung Lee),차천석(Cheonseok Cha),정진오(Jinoh Chung),임광희(Kwanghee Im),심재기(Jaeki Sim),양인영(Inyoung Yang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
In this study, the Al/CFRP structural members which are composed of square shaped aluminum members wrapped with CFRP (Carbon Fiber Reinforced Plastics) outside were manufactured to get a synergy effect when the Al/CFRP member is combined with the advantages of each members, such as energy absorption by the stable folding deformation of the aluminum member and by the high specific strength and stiffness of the CFRP member. The impact collapse tests were performed for the Al/CFRP members. Because the CFRP is an anisotropic material whose mechanical properties, such as strength and elasticity, are changed with its fiber orientation angle, special attention was given to the effects of the fiber orientation angle of CFRP on the collapse characteristics of the Al/CFRP members.