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황우채,양용준,차천석,정종안,김지훈,임광희,김선규,양인영 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
The design of car body structural member aimed to develop members with the optimum impact characteristics to ensure a protectedspace for passengers in the case of automobile collisions. Accordingly, these members were fabricated to provide sufficient rigidityand safety to the passenger room structure and to absorb large amounts of energy during collision. CFRP(Carbon Fiber ReinforcedPlastics) of the advanced composite materials as structure materials for vehicles, has a widely application in lightweight structuralmaterials of air planes, ships and automobiles because of high strength and stiffness. In this study, impact collapse characteristicsand collapse modes were quantitatively analyzed according to the changes in section shape(square, single and double-hat shapedsection) and stacking angles([+15°/-15°]4,[+45°/-45°]4, and [90°/0°]4). This analysis was performed to obtain design data that canbe applied in the development of optimum lightweight members for automobiles.
황우채,이길성,양용준,양인영 한국정밀공학회 2011 International Journal of Precision Engineering and Vol. No.
The vehicles design should be more concerned on the aspect of securing safety performance, and it also should consider reducing weight of a car body. 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. This study is to investigate the energy absorption characteristics of CFRP hat-shaped section members under the axial impact collapse test. The CFRP and hybrid hat-shaped section members which manufactured from unidirectional prepreg sheets were made of 8ply of these sheets stacked at different angles (±15°, ±45°,±90°, 0°/90° and 90°/0). According to the interface numbers (2, 3, 4, 6 and 7) CFRP hat-shaped section members were made.. The axial impact collapse tests were carried out for each section members. The collapse mode and the energy absorption characteristics of the each member were analyzed.
황우채,김정호,서현경,양인영 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.1
자동차를 설계하는 가장 중요한 목적은 현제 환경 친화적인 면과 안전수행 측면에 초점이 맞춰져있다. 경량화 자동차 생산의 전반적인 움직임에 있다 환경친화적인 면과 경제적 측면 때문에 자동차생산에서 경량화에 초점이 맞춰져 있다. 본 연구에서는 사각 단면의 압궤 특성을 고려하여 모자형 단면 부재의 에너지흡수와 압궤특성을 분석하였다. 축 정적 압궤테 스트가 각각의 시험편에 대해여 행하여졌다 각각의 부재들의 에너지홉수와 압궤 모드가 분석되었다. 시험편은 알루미늄 사각부재,CFRP 사각부재,Hybrid 사각부재,CFRP 모자형 단면 부재와 Hybrid 모자형 단면 부재가 사용 되었다. 경량화 측면에서 각각의 부재들의 에너지흡수와 압궤특성이 비교 분석 되었다. The most important purpose in designing automobile is currently focus on environment-friendly, safety performance aspect. As for the environment-friendly and economical aspect, the Issues are the overall movements toward lightweight automobile production. In this study ,based on the collapse characteristics of square section member, the collapse characteristics and energy absorption capability of hat-shaped section members were analyzed. The axial static collapse tests were performed for each section members. The collapse modes and the energy absorption capability of the each section member were analyzed. The square sectional members which were composed of the aluminum. CFRP and hybrid were used and hat-shaped sectional members which were composed of the CFRP, hybrid were used by the specimens. In the lightweight design aspect, the collapse characteristics and energy absorption capability of the each member were compared and they were analyzed.
경량화용 CFRP 단일 모자형 부재와 CFRP 이중 모자형 부재의 계면수 변화에 따른 정적압궤특성
황우채,차천석,양인영 한국안전학회 2012 한국안전학회지 Vol.26 No.6
Currently, the most important purpose in designing automobile is environment-friendly and safety performance aspect. CFRP(Carbon Fiber Reinforced Plastics) of the advanced composite materials as structure materials for vehicles, has a wide application in lightweight structural materials of air planes, ships and automobiles because of high strength and stiffness. In this study, experimental investigations are carried out for CFRP single and double hat shaped section member in order to study the effect of various stacking condition. They were cured by heating to the appropriate curing temperature(130°C) by means of a heater at the vacuum bag of the autoclave. The stacking conditions were selected to investigate the effect of the interface numbers. The CFRP single and double hat shaped section members which manufactured from unidirectional prepreg sheets were made of 8ply. The static collapse tests performed and the collapse mode and energy absorption capability were analyzed according to interface number
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.
황우채(Woo-Chae Hwang),서현경(Hyeon-kyeong Seo),이길성(Kil-Sung Lee),김지훈(Ji-Hoon Kim),양인영(In-Young Yang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The most important objective in designing automobile is currently focus on environment-friendly, safety performance aspect. As for the environment-friendly and economical aspect, the issues are the overall movements toward lightweight automobile production. In this paper, based on the characteristics of square section member, the collapse characteristics and energy absorption capability of hat-shaped section members were analyzed. The axial static collapse tests were performed for each section members. The collapse modes and the energy absorption capability of the each section member were analyzed. The square sectional members which were composed of the aluminum, CFRP and hybrid were used and hat-shaped sectional members which were composed of the CFRP, hybrid were used by the specimens. In the collapse characteristics and energy absorption capability of the each member compared and they were analyzed.
경량화용 Hybrid 사각 복합구조부재의 충돌 거동 평가
황우채(Woochae Hwang),서현경(Hyeonhyeong Seo),심재기(Jaeki Sim),한길영(Gilyoung Han),양인영(Inyoung Yang) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
In this study, the Hybrid square composite structural members were manufactured using aluminum and Carbon Fiber Reinforced Plastics (CFRP) which are representative lightweight materials. The disadvantages of aluminum and CFRP members were considered to be mutually complimentary while the advantages of each member were combined to exhibit collapse characteristics of effective structural members. Impact axial collapse tests were carried out for the compound members, which comprised an aluminum member externally reinforced by stacking CFRP.
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°)