Dynamic Friction Coefficient of Sliding Isolators at Different Low Temperatures and Exposure Times

In this study, effect of low-temperature exposure time on dynamic friction coefficient of Curved Surface Slider (CSS) was investigated. Accordingly, a full-scale double CSS was subjected to cyclic motions after being conditioned at various temperatures and exposure times. The experimental program also considered the effects of both normal stress and loading velocity on the variation of dynamic friction coefficient. Test results showed that the dynamic friction coefficient decreases with decreasing temperature and increasing exposure time. This observation is in contradiction with current design approach of bounding analysis where low-temperature exposure is considered within the scope of upper bound case.