Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Reliability Based Design of the Automotive Components considering Degradation Properties of Polymeric Materials

열화물성을 고려한 차량용 플라스틱 부품의 신뢰성 기반 설계

  • 도재혁 (연세대학교 기계공학부) ;
  • 이종수 (연세대학교 기계공학부) ;
  • 안효상 (현대자동차 고분자재료연구팀) ;
  • 김상우 (현대자동차 고분자재료연구팀) ;
  • 김석환 (현대자동차 고분자재료연구팀)
  • Received : 2016.05.10
  • Accepted : 2016.06.14
  • Published : 2016.09.01
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Abstract

In this study, we used a stochastic approach for guaranteeing the reliability and robustness of the performance with regard to the design of polymer components, while taking into consideration the degradation properties and operating conditions in automobiles. Creep and tensile tests were performed for obtaining degradation properties. The Prony series, which described the viscoelastic models, were calculated to use the creep data by the Maxwell fluid model. We obtained the stress data from the frequency response analysis of the polymer components while considering the degradation properties. Limit state functions are generated by using these data. Reliability assessments are conducted under the variation of the degradation properties and area of frequency at peak response. For this study, the input parameters are assumed to be a normal distribution, and the reliability under the yield stress criteria is evaluated by using the Monte Carlo Simulation. As a result, the reliabilities, according to the three types of polymer materials in automotive components, are compared to each other and suggested the applicable possibility of polymeric materials in automobiles.

Keywords

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