Comparison between high and low speed coef of friction

[loquillo]

How is the coef of friction affected when we are dealing with high speed sliding and we compare it to low speed experimentally determined coefs of friction? I know it should decrease, but is the difference between both values negligible or enough to change the whole problem? Also at high speeds the surfaces store large amounts of heat, is that a factor to take into consideration when determining the coef.?

 

[loquillo]

After comparing the experimental slide obtained in the car drop test with the brake slide model, the coefficient of friction obtained experimentally apparently was to high. The clamping force and the speed affects the coef of frict disregard of the surface finish of the sliding surface.

 

[loquillo]

I gathered data for different coefs of friction for brake pads and it was about the same # that I obtained experimentally (about 0.4). Therefore comparing both high speed systems we can conclude that the speed doesn't affect the coef. at all. (correction for the statement above)