Determination of Maximum Temperature Stress Level in the Accelerated-life Test of Vermiculite Reinforced Gaskets
Investigating high reliability gaskets'life usually adopts accelerated-life test which requires for the same failure mechanism,in this case,reasonably selecting the gaskets'highest stress level becomes particularly important.In this paper,through taking vermiculite reinforced gaskets as the object of study,a temperature accelerated degradation test was implemented,including establishing gasket's Power-law degradation model,having Arrhenius equation and activation energy principle based to obtain the tempera-ture interval of failure mechanism transition.Under the premise of given failure threshold,the hypothesis test of pseudo life data conforming to Weibull distribution was carried out to determine gasket's maximum-temperature stress level of 1 123 K.The test on the degraded gasket's compression resilience shows that,as for the degradation temperature higher than 1 123 K,the gasket's compression resilience performance will decrease significantly,which further proves the rationality of the maximum-temperature stress level of 1 123 K.
seal gasketaccelerated degradation testloss-on-ignitionfailure mechanismcompression resilience performancemaximum-temperature stress level