Numerical simulations of the surface topography effect on the generated frictional heat distribution in brake systems

Abstract

611-617<span style="font-size:11.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;letter-spacing:-.1pt;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">Several studies have investigated the influence of various parameters on temperature at the surface contact disc/pad car, such as the vehicle deceleration, vehicle weight, braking force, coefficient of friction and pressure distribution over the braking surface area. However, hardly any study has been reported on the effect of surface roughness on the temperature distribution. In this study, a 3D numerical model is developed in order to investigate the effect of surface roughness on temperature field at different sliding speeds. The simulation reveals that the temperature at the surface and along the disc thickness depends strongly on asperities interactions and mode of surface deformation. This investigation also shows the beneficial role of copper in brake pad. The generated frictional heat at the contact surface between the brake disc and pad decreases with increasing of amount of copper up to a percentage of 8%. Beyond this proportion, the temperatures reach a stable level.</span