Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Study on the Degradaion Behavior of Acrylonitrile Rubber(NBR) O-ring by Intermittent CSR and Time-Temperature Superposition Principle

간헐 압축응력완화 시험법과 시간-온도 중첩 이론을 이용한 NBR 오링의 노화 거동 분석 연구

  • Lee, Jin Hyok (Rubber Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Bae, Jong Woo (Rubber Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Choi, Myung Chan (Rubber Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Yun, Yu Mi (Rubber Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Kim, Wonho (Department of Polymer Science and Chemical Engineering, Pusan National University) ;
  • Park, Sung Han (Agency for Defense Development) ;
  • Jo, Nam-Ju (Department of Polymer Engineering, Pusan National University)
  • Received : 2018.06.17
  • Accepted : 2018.12.02
  • Published : 2019.02.01
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Abstract

Intermittent CSR testing was used to investigate the degradation of a NBR O-ring, and also the prediction of its life-time. An intermittent CSR jig was designed taking into consideration the O-ring's environment under use. Degradation of O-rings by thermal aging was observed between $40^{\circ}C$ and $120^{\circ}C$. O-rings showed non-linear degradation behavior under $80^{\circ}C$. At 20% of failure condition, predicted life-times were 32.5 years by Arrhenius plot and 22.6 years by WLF plot.

Intermittent CSR 측정법을 이용하여 NBR 오링의 노화 거동과 수명 예측에 관하여 연구하였다. Intermittent CSR jig는 오링의 실제 사용 환경을 고려하여 설계 제작하였다. 오링의 노화 거동은 $40{\sim}120^{\circ}C$에서의 가속 노화 연구를 통하여 관찰하였다. 오링은 $80^{\circ}C$ 이하에서 비선형 노화 거동을 나타내었다. 오링의 수명은 고장 조건 20%에 대하여 Arrhenius plot으로부터 32.5년, WLF plot으로 부터 22.6년으로 나타났다.

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References

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