车门密封胶条力学性能衰变分析

Destruction Analysis of Mechanical Properties of Door Sealing Strips

按照国家标准的规定,检测自然条件使用的密封胶条样品的硬度和拉伸性能(拉伸强度、拉断伸长率),从自然老化的角度分析了密封胶条老化前后力学性能变化规律,从性能保持率的角度分析了密封胶条的劣化程度,最后基于密封胶条拉断伸长率的数据,构建了6阶拉格朗日插值多项式,对车门密封胶条使用寿命进行了预测,结果显示其使用寿命是185个月。

According to the national standards.The change of mechanical properties of sealing strips before and after aging was analyzed from the perspective of natural aging,and the deterioration degree of the sealant strip is analyzed from the angle of performance retention rate.Finally,based on the data of the elongation at break of the sealant strip,the service life of urban rail vehicle door sealant strip is predicted with a six square Lagrange interpolation polynomial,the results show that the service life is 185 months.