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A Study on the Accelerated Life Test of Rubber Specimens by using Stress Relaxation

응력완화를 이용한 고무시편의 가속수명시험 연구

  • Lee, Su-Yeong (Dept. of Mechanical Engineering, Graduate School of Seoul National University of Science and Technology) ;
  • You, Ji Hye (Dept. of Mechanical Engineering, Graduate School of Seoul National University of Science and Technology) ;
  • Lee, Yong-Sung (Center for Energy System Research, Seoul National University of Science and Technology) ;
  • Kim, Hong Seok (Dept. of Mechanical and Automotive Engineering, Seoul National University of Science and Technology) ;
  • Cheong, Seong-Kyun (Dept. of Mechanical and Automotive Engineering, Seoul National University of Science and Technology) ;
  • Shin, Ki-Hoon (Dept. of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
  • 이수영 (서울과학기술대학교 일반대학원 기계공학과) ;
  • 유지혜 (서울과학기술대학교 일반대학원 기계공학과) ;
  • 이용성 (서울과학기술대학교 에너지시스템연구소) ;
  • 김홍석 (서울과학기술대학교 기계.자동차공학과) ;
  • 정성균 (서울과학기술대학교 기계.자동차공학과) ;
  • 신기훈 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2016.01.05
  • Accepted : 2016.01.29
  • Published : 2016.02.29

Abstract

Rubber parts are widely used in many applications such as dampers, shock absorbers, and seals used in railway and automotive industries. Much research has thus far been conducted on property estimation and life prediction of rubber parts. To predict the service life of rubber parts at room temperature, most prior work adopts the well-known Arrhenius model that needs the accelerated life test in high-temperature conditions. However, they may not reflect the actual conditions of use that rubber parts are usually used under a specific strain condition during long period of time. In this context, we propose a method for the life prediction of rubber parts in actual conditions of use. The proposed method is based on the accelerated life test using stress relaxation during which three relatively high elongation percentages (100%, 200%, and 300%) are applied to the rubber specimens. Rubber specimens were prepared in accordance with KS M 6518 standard and three stress relaxation testers were fabricated for actual experiments. Finally, a inverse power model for life prediction was derived from experimental results. The predicted life was compared with the actual test life for validation.

Keywords

References

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