Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)

The Korean Reliability Society (한국신뢰성학회)
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Lifetime Prediction of Automotive Airbag Fabrics

자동차 에어백용 원단의 수명예측

  • Koo, Hyun-Jin (Reliability Assessment Center.FITI Testing & Research Institute) ;
  • Cho, Hang-Won (Reliability Assessment Center.FITI Testing & Research Institute) ;
  • Chang, Gap-Shik (Reliability Assessment Center.FITI Testing & Research Institute)
  • 구현진 (FITI시험연구원 신뢰성평가센터) ;
  • 조항원 (FITI시험연구원 신뢰성평가센터) ;
  • 장갑식 (FITI시험연구원 신뢰성평가센터)
  • Received : 2009.08.03
  • Accepted : 2009.09.25
  • Published : 2009.12.25
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Abstract

The airbag module is an inflatable restraint system that inflates within 0.05 seconds automatically in a collision to protect the occupants. The airbag fabrics used in the module are required to have the good resilience and strength and also to have retained at least 80% of mechanical properties after using longer than 10 years. In this study, we develop an accelerated test method in order to predict the lifetimes of airbag. In this test, we select temperature and humidity as environmental stresses by analyzing the failure mechanisms of coated and uncoated nylon 66 fabrics. It is found that the degradation of airbag fabrics is effectively accelerated under the combined conditions of high temperature and humidity. Analyzing the results of the accelerated test, the lifetimes of airbag fabrics are predicted to be longer than 10 years.

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