| In this study,the accelerated ageing test of EPDM O-ring was carried out using typical sealing fixture based on actual packaging structure.The change trends of compression set of O-ring at different ageing temperature (65,85 and 105 ℃) and different ageing time (5,10,15,20,25 and 30 d) were investigated.Through mathematical regression,the relationship between the time to failure and application temperature were obtained,and the predicated lifetime of EPDM O-ring was 17.8 years.Moreover,the predicted curve was in good accordance with the experimental curve and the correlation coefficient was greater than 0.95. |
