Analytical and Experimental Investigation on Wear Performance of Disc Brake Pad

Abstract

Automotive disc brake pads are subjected to different wear situations under variable operating conditions; industry needs to evolve the methodology to estimate wear rate of brake pads to address the issue of extreme brake fading. In the present investigation friction and wear behavior of different brake pads is tested on newly developed test rig under dry sliding conditions. The analytical model is proposed to simulate different operating conditions using Winkler differential and integral relation. The infrared thermal images at the interface of the brake pad and disc were obtained to analyze the temperature variations under different operating conditions. The results showed the correlation of the load (20 N-80 N) and speed (300 rpm-1100 rpm) with temperature at the interface between pad and disc varies from 97.80 C to 306.70 C, which is moderate rise. The coefficient of friction increases as load increases from 0.24 at 300 rpm, 20 N load and maximum value 0.64 at 1000 rpm, 60 N load. Temperature rise at higher load and speed having the major influence on changing the friction and wear behavior of pad friction material. There is a consistency between reported experimental observations and obtained values from the proposed the analytical model.

Keywords

• wear behavior
• coefficient of friction
• winkler model
• sliding speed
• interface temperature
• friction test rig