Effect of Surface Roughness on Tribological and NVH Behaviour of Brake System

<div class="section abstract"><div class="htmlview paragraph">Brake assemblies are an essential part of any vehicle, and their effective functioning is critical for the safety and comfort of passengers. The surface roughness of brake components plays a vital role in figuring out their tribological and NVH (Noise, Vibration, and Harshness) behavior. It is essential to understand the impact of surface roughness on brake performance to ensure efficient braking and it has been a topic of interest in the automotive industry. In this study, the influence of surface roughness on the wear, and noise characteristics of a brake assembly has been investigated. The study also provides insights into the relationship between surface roughness, frictional behavior, and NVH performance, which can be used to improve the design and manufacturing of brake assemblies. The brake assembly includes of a disc, caliper, and brake pads, which work together to convert the kinetic energy of the vehicle into heat energy, has been considered in this study. First, the tribological behavior of the brake assembly under varying surface roughness conditions has been studied. The roughness of the rotor affected the formation of a transfer layer on the brake pad, which contributed to the frictional behavior of the assembly. Increase in surface roughness results in increased contact area and adhesion between the rubbing surfaces, leading to higher frictional forces and wear. The wear of the brake pads and their respective operational life is calculated according to different surface roughness conditions. Another crucial parameter affected by surface roughness is the NVH behavior of brake assemblies. The surface roughness of brake components alters the contact pressure distribution and affects the vibration behavior of the brake system. The change in NVH performance according to the surface roughness value is predicted. This study highlights the importance of considering surface roughness as a critical parameter in the design and development of brake assemblies. The findings of this study can help the automotive industry and improve the safety and comfort of vehicle occupants.</div></div>