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.BRMethods: 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.BRResults: Using the derived acceleration factors, when the temperature was accelerated to 110,130°C, the average life expectancy was reduced by 45% and 65%.BRConclusion: 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.
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