• Title/Summary/Keyword: 사이드 멤버

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구조용 FRP부재의 적층구성이 흡수에너지특성에 미치는 영향

  • 최효석;김영남;양인영
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 1999.06a
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    • pp.25-30
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    • 1999
  • 자동차의 정면 충돌시 발생하는 충돌에너지를 흡수하여 인명을 보호하기 위한 장비중 구조 역학적 관점에서 고려될 수 있는 것으로 범퍼와 사이드멤버(Side Member)가 있다. 이들중 범퍼는 시속 8km/hr 이하의 저속 충돌시에 탄성 변형에너지로서 충돌에너지를 흡수하는 역할을 하나, 그 이상의 고속 정면 충돌시에는 일반적으로 사이드멤버가 충돌에너지의 60∼70%를 부재의 연속적인 대변형에 의한 소성에너지에 의해 흡수하고 있다. (중략)

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Effect of Bead Shape in Aluminum Crash Box for Effective Impact Energy Absorption Under Low- Velocity Impact Condition (저속충돌조건에서 효과적인 충돌에너지흡수를 위한 알루미늄 크래쉬 박스의 비드형상 효과)

  • Lee, Chan-Joo;Lee, Seon-Bong;Ko, Dae-Cheol;Kim, Byung-Min
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.10
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    • pp.1155-1162
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    • 2012
  • The purpose of this study is to investigate the effects of the bead shape on the crash performance of an aluminum crash box under a low-velocity impact condition. The initial peak load and impact energy absorption of a crash box with three types of bead shapes-edge concave, surface convex, and surface concave type-were studied through an FE analysis and an experiment. In addition, the effects of the bead shapes on the crash performance of the crash box were verified through a low-velocity-impact test with a front side member assembled with an aluminum crash box. The initial peak load of the surface-concave-type crash box was reduced by the bead, and therefore, deformation of the front side member at initial contact could be prevented. Furthermore, there was no deformation of the front side member after the impact test because the crash box with a surface-concave-type bead absorbed all the impact energy.

Determination of Position for Reinforcement Blank at Simultaneous Forming Analysis of Automotive Front Side Member (자동차용 프론트 사이드 멤버의 일체복합성형해석 및 보강판재의 위치결정)

  • Yoon, S.J.;Kim, H.Y.;Kim, K.H.;Kim, J.J.;Song, J.H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2008.10a
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    • pp.178-182
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    • 2008
  • Automotive manufacturers lay their eyes on the new manufacturing technologies because of the strengthened competition. Among them, a simultaneous forming is one of the innovative forming technologies to be able to reduce production time and cost. Several parts can be simultaneous manufactured by process, while the conventional stamping demands the same number of die sets with the number of parts. In this study, the automotive front side member was manufactured by the simultaneous forming. The position and the size of initial blank were determined by forming analysis and try-outs, and the blank movement during the forming was controlled by introducing the pilot pin.

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Crash Performance of Front Side Member Impacted with Angle (프론트 사이드 멤버의 경사 충돌 성능)

  • Kang, Sungjong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.2
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    • pp.52-59
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    • 2014
  • Front impacted SUV vehicle shows that the front parts of side members are collapsed by the bending due to the transverse load exerted at the end of side members. Side member models were impacted with various angles in order to study the crash performance according to the impact angle. Even for the small impact angle of $10^{\circ}$, crash performance seriously deteriorated and the deformations for impact angle $15^{\circ}$ were similar to those from the front body impact analysis. In addition, the angled front impact analysis for the straight member with hat section was carried out and the effects of inner reinforcement shape on crash performance was investigated.

Determination of Shape and Position for Reinforcement Blank at Simultaneous Forming of Automotive Side Member (자동차용 사이드 멤버 일체복합성형시 보강판재의 형상 및 위치 결정)

  • Kim, H.Y.;Hwang, S.H.;Kim, K.H.;Yun, J.J.;Song, J.H.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2007.10a
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    • pp.223-227
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    • 2007
  • New forming technologies are being introduced to automotive manufacturing processes. Among them, a simultaneous forming is one of the innovative forming technologies to be able to reduce production time and cost. Several parts can be simultaneously manufactured by the process, while the conventional stamping demands the same number of die sets with the number of parts. In this study, the automotive rear floor side member was manufactured by the simultaneous forming. The position and the size of initial blank were determined by forming analyses and try-outs, and the blank movement during the forming was controlled by introducing the spotweld.

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A Study on the Optimum Design of the Automotive Side Member to Maximize the Crash Energy Absorption Efficiency (충돌에너지 흡수효율 최대화를 위한 자동차 사이드 멤버 최적 설계에 관한 연구)

  • Lee, Jung Hwan;Jeong, Nak Tak;Suh, Myung Won
    • Journal of the Korean Society for Precision Engineering
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    • v.30 no.11
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    • pp.1179-1185
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    • 2013
  • In this study, the design optimization of the automotive side member is performed to maximize the crash energy absorption efficiency per unit weight. Design parameters which seriously influence on the frontal crash performance are selected through the sensitivity analysis using the Plackett-Burman design method. And also the design variables, which are determined from the sensitivity analysis, are optimized by two methods. One is conventional approximate optimization method which uses the statistical design of experiments (DOE) and response surface method (RSM). The other is a methodology derived from previous work by the authors, which is called sequential design of experiments (SDOE), to reduce a trial and error procedure and to find an appropriate condition for using micro-genetic algorithm. The proposed optimization technique shows that the automotive side member structure can be designed considering the frontal crash performance.

Forming process design for the twist reduction of an automotive front side member (프론트 사이드 멤버의 비틀림 저감을 위한 성형공정 설계)

  • Yin, Jeong-Je
    • Journal of the Korean Society of Mechanical Technology
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    • v.13 no.1
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    • pp.105-112
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    • 2011
  • Increasing needs for light weight and high safety in modern automobiles induced the wide application of high strength steels in automotive body structures- The main difficulty in the forming of sheet metal parts with high strength steel is the large amount of springback including sidewall curl and twist in channel shaped member parts- Among these shape defects, twist occurs frequently and requires numerous reworks on the dies to compensate the shape deviation- But until now, it seems to be no effective method to reduce the twist in the forming processes- In this study, a new forming process to reduce the twist deformation during the forming of automotive structural member was suggested- This method consists of forming and restriking of embosses on the sidewall around the stretch flanging area of the part- and was applied in the forming process design of an automotive front side inner member with high strength steel- To evaluate the effectiveness of the method, springback analysis using $Pamstampa^{tm}$ was done- Through the analysis results, the suggested method was proven to be effective in twist reduction of channel shaped parts with stretch flanging area.

Hydro-forming Process Development of Automotive AA6061 Rear Sub-frame Side Member by Computer Aided Engineering (CAE) (컴퓨터 시뮬레이션(CAE)을 이용한 자동차용 AA6061 리어 서브-프레임 사이드멤버의 하이드로-포밍 공정 개발)

  • Kim, Kee-Joo;Kim, Jae-Hyun;Choi, Byung-Ik
    • Transactions of the Korean Society of Automotive Engineers
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    • v.18 no.5
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    • pp.45-49
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    • 2010
  • The automotive industry has shown a growing interest in tube hydroforming during the past years. The advantages of hydroforming (less thinning, a more efficient manufacturing process, etc.) can, for instance, be combined with the high strength of extra high strength steels, which are usually less formable, to produce structural automotive components which exhibit lower weight and improved service performance. Design and production of tubular components require knowledge about tube material and forming behavior during hydroforming and how the hydroforming operation itself should be controlled. These issues are studied analytically in the present paper. In this study, the whole process of rear sub-frame parts development by tube hydroforming using AA6061 material is presented. At the part design stage, it requires feasibility study and process design aided by CAE (Computer Aided Engineering) to confirm hydroformability in details. Effects of parameters such as internal pressure, axial feeding and geometry shape in automotive rear sub-frame by hydroforming process were carefully investigated. Overall possibility of hydroformable rear sub-frame parts could be examined by cross sectional analyses. Moreover, it is essential to ensure the formability of tube material on every forming step such as pre-bending and hydroforming. In addition, all the components of prototyping tool are designed and interference with press is examined from the point of geometry and thinning.