蛭石增强垫片加速寿命试验的最高温度应力水平确定研究  

Determination of Maximum Temperature Stress Level in the Accelerated-life Test of Vermiculite Reinforced Gaskets

作　　者：张翠霞 姚炳洋 胡康 邵春雷[1] 聂政威 ZHANG Cui-xia;YAO Bing-yang;HU Kang;SHAO Chun-lei;NIE Zheng-wei(School of Mechanical and Power Engineering,Nanjing Tech University)

机构地区：[1]南京工业大学机械与动力工程学院

出　　处：《化工机械》2024年第2期193-200,259,共9页Chemical Engineering & Machinery

基　　金：国家重点研发计划项目(批准号:2020YFB2008000)资助的课题。

摘　　要：研究高可靠性垫片的寿命通常采用加速寿命试验,而加速寿命试验要求失效机理一致,因此合理地选择垫片最高应力水平尤为重要。以蛭石增强垫片为研究对象,进行温度加速退化试验,建立了垫片的幂律退化模型,基于Arrehenius方程和激活能原理得到了失效机理转变的温度区间;在给定失效阈值前提下,对伪寿命数据服从Weibull分布进行假设检验,确定了垫片最高温度应力水平为1123 K。对退化过的垫片进行压缩回弹试验,结果表明,当退化温度高于1123 K时,垫片的压缩回弹性能明显下降,进一步说明最高温度应力水平为1123 K的合理性。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 temperature 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 1123 K.The test on the degraded gasket’s compression resilience shows that,as for the degradation temperature higher than 1123K,the gasket’s compression resilience performance will decrease significantly,which further proves the rationality of the maximum-temperature stress level of 1123 K.

关 键 词：密封垫片 加速退化试验 烧失量 失效机理 压缩回弹性能 最高温度应力水平 

分 类 号：TQ055.83[化学工程]