Frictionally excited thermoelastic instability in viscoelastic and poroelastic media (Q1614095)

The author investigates the effects of viscoelastic and poroelastic properties of friction materials commonly used in sliding applications, such as clutches and brakes, on the onset of frictionally excited thermoelastic instability. It is shown that for porous friction materials employed in wet clutches, which are weakly viscoelastic, the neglect of their poroelastic behaviour leads to an overestimate of the critical speed about \(10\%\). Much larger variations are predicted for elastomeric and porous materials with more pronounced viscoelastic behaviour.