About the article
A.F. GUSEV, V.V. IZMAILOV, M.V. NOVOSELOVA
A diagram is presented and a description of the design of a laboratory installation for the experimental determination of the sliding friction coefficient, assembled on the basis of the classical Atwood machine, is given. The measurement technique is described and formulas are proposed to calculate the friction coefficient. The advantage of the presented installation is the extremely simple and most reliable loading scheme for the contact of rubbing surfaces - gravitational, which provides stable and absolutely accurate values of both the normal pressure force on the contact and the tangential force. The relative instrumental error does not exceed 0.5 %, which is significantly less than the random error characteristic of experiments measuring friction coefficients. It is recommended to use a modernized setup and methodology to create laboratory work in tribology and triboengineering courses.
tribology, sliding friction coefficient, laboratory work, Atwood machine.