Coefficient Of Friction Granite On Granite

The coefficients of friction are independent of the surface area in contact.

Coefficient of friction granite on granite.

The first regime includes dry granite up to at least 845 and wet granite below 250 c. The friction force is the force exerted by a surface when an object moves across it or makes an effort to move across it. At high confining pressure the coefficient of friction μ for granite depends on the relative displacement of the surfaces. The coefficient of kinetic friction is generally lower than the coefficient of static friction on the same surface.

μ static μ s or kinetic μ k frictional coefficient. First you tape the low g accelerometer on the end of the surface in this case a slab of granite. The static friction coefficient μ between two solid surfaces is defined as the ratio of the tangential force f required to produce sliding divided by the normal force between the surfaces n μ f n. The second regime includes wet granite above 350 c.

F f frictional force n lb. F f μ n 1. Direct shear tests were conducted on a granite to granite interface for the purpose of tracing the evolution of frictional resistance as the initially smooth and polished surface wears during continuing shearing displacement. The frictional force can be expressed as.

Static coefficient of friction. N normal force between the surfaces n lb there are at least two types of friction forces. For ground surfaces μ reaches a maximum after about 0 1 cm and then decreases to nearly a constant value after 0 5 cm of sliding has occurred.