Effects of wear on the friction coefficient of a curved surface slider

The study investigates the modification in the friction coefficient of a Curved Surface Slider (CSS) due to service movements through complementary tests performed on a small-scale specimen of the sliding material and a full-scale prototype, both of them subjected to a sliding distance of 1000 m. The changes in the coefficient of friction vs. the sliding distance are compared, demonstrating that small-scale tests provide fair estimates of the friction properties of the full-scale CSS. Moreover, the seismic response of the CSS remains almost the same regardless of the sliding distance.