Effects of Viscoelastic Properties of Friction Lining Materials on Their Friction Coefficients

Abstract

In order to obtain the viscoelastic properties of friction linings and their effect on the tribological properties, three friction linings (K25, G30, and GM-3) are studied. Results show that higher creep and stress relaxation performances are favorable for promoting the friction coefficient. The friction coefficient of GM-3 is inversely proportional to the load. Meanwhile, the friction coefficients of K25 and G30 first increase to the peak under the load and later decrease. Under high load, GM-3 has the largest friction coefficient, whereas K25 has the smallest, with that of G30 being the median. The friction coefficient of GM-3 is inversely proportional to the loss factor, whereas those of K25 and G30 are directly proportional.