수소전기차 고압연료시스템 Sealing소재 EPDM의 온도가속에 따른 수명데이터 분석 및 가속시험법 연구
Temperature Acceleration-Based Life Data Analysis and Acceleration Test Method for EPDM in High-Pressure Fuel System Sealing Materials for Fuel Cell Electric Vehicles
김현성(한국자동차연구원); 양정직(한국자동차연구원); 서지원(한국자동차연구원)
22권 3호, 211~218쪽
초록
Purpose: In this study, to shorten the EC 79 test time, an accelerated test method for nonmetallic materials such as ethylene propylene diene monomer (EPDM), which constitute the major component of the high-pressure fuel system of fuel-cell electric vehicles, was studied. Methods: After failure mode and effect analysis, heat was selected as the accelerating stress, and an accelerated thermal-aging experiment was conducted for each temperature condition of EPDM. The acceleration of the Weibull distribution was verified from the life data analysis using the Minitab program. Further, the Arrhenius acceleration model was employed to derive acceleration factors for each temperature condition. Results: Using the derived acceleration factors, when the temperature was accelerated to 110,130°C, the average life expectancy was reduced by 45% and 65%. Conclusion: If the temperature condition is accelerated, the average life of nonmetallic EPDM is effectively shortened. In further research, this result will be verified by applying an accelerated test method to major components comprising EPDM.
Abstract
Purpose: In this study, to shorten the EC 79 test time, an accelerated test method for nonmetallic materials such as ethylene propylene diene monomer (EPDM), which constitute the major component of the high-pressure fuel system of fuel-cell electric vehicles, was studied. Methods: After failure mode and effect analysis, heat was selected as the accelerating stress, and an accelerated thermal-aging experiment was conducted for each temperature condition of EPDM. The acceleration of the Weibull distribution was verified from the life data analysis using the Minitab program. Further, the Arrhenius acceleration model was employed to derive acceleration factors for each temperature condition. Results: Using the derived acceleration factors, when the temperature was accelerated to 110,130°C, the average life expectancy was reduced by 45% and 65%. Conclusion: If the temperature condition is accelerated, the average life of nonmetallic EPDM is effectively shortened. In further research, this result will be verified by applying an accelerated test method to major components comprising EPDM.
- 발행기관:
- 한국신뢰성학회
- 분류:
- 신뢰성이론