• Title/Summary/Keyword: Equi-Biaxial Tension

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A Study on Finite Element Analysis and Aging Test for Automotive Grommet (자동차 그로멧의 유한요소해석 및 노화시험에 대한 연구)

  • Lee, Seong-Beom;Yeom, Sang-Hoon;Han, Chang-Yong;Woo, Chang-Su
    • Elastomers and Composites
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    • v.47 no.3
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    • pp.201-209
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    • 2012
  • Grommet is one of the Automotive rubber components and is made from EPDM(Ethylene Propylene Diene monomer M-class) rubber and the nonlinear hyperelastic material properties of rubber are important to predict the behavior of rubber product. In this study, the stable stress-strain relations were obtained from the uni-axial tension test and the equi-biaxial tension test. Finite element analysis for grommet was carried out and heat aging test for the lifetime prediction of grommet was introduced.

Structural Robust Design of PEMFC Gasket Using Taguchi Method (다구찌 방법을 이용한 고분자 전해질 연료전지 가스켓의 강건 구조 설계)

  • Yoon, Jin-Young;Park, Jung-Sun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.36 no.8
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    • pp.740-746
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    • 2008
  • In this paper, robust structural design of the PEMFC stack gasket is pursued with Taguchi method by considering the noise factor in stack assembly. The study of noise problem in stacking is required to secure the safety and performance improvement of PEMFC stack. The design parameters in the Taguchi method are selected so that the structural responses are insensitive to the noise factors. In the gasket analysis, a Mooney-Rivlin strain energy function is used to consider hyperelasticity between load and displacement. By uni-axial and equi-biaxial tension tests of the gasket, the material properties are determined for the use in robust design of PEMFC gasket. The robust design of the PEMFC stack may provide structural reliability.

Nonlinear Analysis of Rubber Bellows for the High Speed Railway Vehicle (고속철도차량 갱웨이 벨로우즈의 비선형 해석)

  • Kang, Gil-Hyun;Kim, Chul-Su
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.8
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    • pp.3631-3637
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    • 2013
  • Gangway bellows in this study is the double wrinkled neoprene rubber component to accept various deviations between the carriage end parts of the articulated type high speed railway vehicle(HSRV). The fatigue failure of the bellows has a harmful effect on the riding comfort for the passengers with the increase of noise and ringing in the ears due to air-tightness failure during pass through a long tunnel. In this study, to assure the safety of gangway bellows of the HSRV, non-linear analysis of the gangway bellows considering triaxial angular displacement(rolling /yawing/pitching) between the carriage end parts are performed. The non-linear properties of the rubber are determined by uniaxial tension and equi-biaxial tension test. Moreover, from the results of non-linear analysis, the effects of the angular displacements and frictional coefficients are evaluated.