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자료유형
학술저널
저자정보
윤지용 (현대자동차) 김상우 (현대자동차) 김종현 (현대자동차) 이춘수 (현대자동차)
저널정보
한국신뢰성학회 신뢰성응용연구 신뢰성응용연구 제20권 제4호
발행연도
2020.12
수록면
324 - 331 (8page)
DOI
10.33162/JAR.2020.12.20.4.324

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Purpose: The engine room temperature of automobiles is constantly rising as the turbo system installation rate increases. On the other hand, plastic materials are very sensitive on temperature changes. Therefore, the heat aging characteristics of plastics applied to automobile powertrains and the lifetime estimation of plastic parts were studied.
Methods: Heat aging test by temperature condition was conducted for plastic materials applied to automobile powertrain parts. Also, field vehicle operating conditions and environmental temperature were measured. Based on heat aging test and field data, reliability analysis was conducted
Results: The influence on the mechanical properties was identified, and the acceleration evaluation limit temperature was obtained through the analysis of the degradation mechanism of plastics. The activation energies for mechanical properties and composition of plastic materials were derived from established Arrhenius lifetime estimation model. Also, damage prediction in real environmental conditions and limit temperature to resist in life time of several structural powertrain plastic parts were analyzed and safety factor or limit temperature were determined for these plastic parts.
Conclusion: A method for analyzing thermal damage in the actual environment of the plastic powertrain parts was established.

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