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2. Standard tribometric tests
2.1 General description
Friction and wear are classically measured on a tribometer, a machine that ensures the relative motion of two solid bodies under a normal force P and usually kept constant; P allows the contact pressure to be adjusted to the desired level. The Coulomb friction coefficient or average contact cission is obtained directly from the tangential force F and the macroscopic or apparent contact area A a :
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Standard tribometric tests
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