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Deformation Behavior of Curling Strips on Tearing Tubes

테어링 튜브 컬의 변형 거동 예측 기법 연구

  • Choi, Ji Won (Dept. of Robotics and Virtual Engineering, Korea Univ. of Science and Technology) ;
  • Kwon, Tae Soo (Dept. of Robotics and Virtual Engineering, Korea Univ. of Science and Technology) ;
  • Jung, Hyun Seung (Dept. of Robotics and Virtual Engineering, Korea Univ. of Science and Technology) ;
  • Kim, Jin Sung (Dept. of Robotics and Virtual Engineering, Korea Univ. of Science and Technology)
  • 최지원 (과학기술연합대학원대학교 로보틱스 및 가상공학) ;
  • 권태수 (과학기술연합대학원대학교 로보틱스 및 가상공학) ;
  • 정현승 (과학기술연합대학원대학교 로보틱스 및 가상공학) ;
  • 김진성 (과학기술연합대학원대학교 로보틱스 및 가상공학)
  • Received : 2015.04.15
  • Accepted : 2015.08.06
  • Published : 2015.10.01

Abstract

This paper discusses the analysis of the curl deformation behavior when a dynamic force is applied to a tearing tube installed on a flat die to predict the energy absorption capacity and deformation behavior. The deformation of the tips of the curling strips was obtained when the curl tips and tube body are in contact with each other, and a formula describing the energy dissipation rate caused by the deformation of the curl tips is proposed. To improve this formula, we focused on the variation of the curl radius and the reduced thickness of the tube. A formula describing the mean curl radius is proposed and verified using the curl radius measurement data of collision test specimens. These improved formulas are added to the theoretical model previously proposed by Huang et al. and verified from the collision test results of a tearing tube.

Keywords

Tearing Tube;Energy Absorption Device;Mean Curl Radius;Curl Tip;Collision Test

Acknowledgement

Supported by : 한국철도기술연구원

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