Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Strength Characterisation of Composite Securement Device in the Vehicle by FE Analysis

유한요소해석을 통한 차량내 복합재 휠체어 고정구의 구조 강도 특성 평가

  • Ham, Seok-Woo (Department of Mechanical Engineering, Graduate School, Kongju National University) ;
  • Yang, Dong-Gyu (Department of Mechanical Engineering, Graduate School, Kongju National University) ;
  • Son, Seung-Neo (Project Consulting Department, Intelligent Transport Society of Korea) ;
  • Eo, Hyo-Kyoung (Project Consulting Department, Intelligent Transport Society of Korea) ;
  • Kim, Gyeong-Seok (Department of Civil and Environmental Engineering, Graduate School, Kongju National University) ;
  • Cheon, Seong S. (Department of Mechanical Engineering, Graduate School, Kongju National University)
  • Received : 2019.03.30
  • Accepted : 2019.07.15
  • Published : 2019.08.31
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Abstract

In this paper, the strength of the composite securement device was characterised by FE analysis. Preliminary frontal crash analysis for the vehicle, equipped with the conventional steel securement device, was carried out according to the ISO 10542 for special transportation to obtain loading data, which were applied to securement device during crash. The securement device consists of block, guide and rail and the weight fraction of rail was the highest among them, therefore, it is desirable to reduce weight of rail by applying carbon/epoxy composite. Also, it was found that 27% of lightweight effect was obtained by hybrid rail that bottom part was replaced by a composite compared to the conventional rail, i.e., made of SAPH 440, without sacrificing the structural strength.

본 연구는 복합재를 사용한 휠체어 고정구의 구조 강도 특성에 대하여 평가하였다. 이를 위해 특별교통수단 내 휠체어 고정구의 시험 기준 ISO 10542에 의거하여 전방 충돌 슬레드 유한요소해석을 진행하였고, 이를 통해 얻은 고정구에 작용하는 하중데이터를 휠체어 고정구 유한요소해석의 초기 조건으로 사용하였다. 고정구는 블록, 가이드, 레일로 구성되어 있으며, 이 중에서 레일의 중량 비율이 가장 높기 때문에 탄소섬유 에폭시 복합재를 레일에 적용하는 것이 적합한 것으로 나타났다. 또한 기존의 레일에서 하단 부분을 복합재로 적용한 하이브리드 레일은 기존 SAPH 440으로 제작된 레일의 구조강도와 비슷하게 설계할 경우, 약 27% 정도 경량화를 달성할 수 있는 것으로 나타났다.

Keywords

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