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Institute of General Mechanics Univ.- Prof. Dr.- Ing. Bernd Markert Introduction and Objectives www.iam.rwth-aachen.de © IAM In-house Project Email: [email protected] Dipl.- Ing. Abdelkrim Lamjahdy Project Responsible: Project Funding: The primary aim of this work is to calculate temperature, wear depth and wear mass after a certain braking time. Brass and bronze are used as cylindrical pins, which are in contact with the rotating disc made from GG-25. Experiments are performed by using a pin-on-disc test bench and simulations are performed with the Finite Element Method (FEM). Experimental and simulated results are compared and validated based upon input parameters, such as rotational speed, load and braking time. The motivation is from the fact that many machine components fail because of heating effects, thermal stresses and wear. These parameters strongly influence the overall performance of brakes. So, it is essential and important to estimate temperature, thermal stresses, wear depth and wear mass during braking conditions. Thermal and wear analysis of a brake disc Scheme Of Research Results Constitutive/ Mathematical Model Experiments No Mechanical Analysis Calculation of contact frictional forces Thermal Analysis Wear Analysis End of braking? Yes Stop Wear Rate (Kd) Experimental Results Brass 1, n = 820 rpm, FN = 165N, Validation of the experimental and simulation results Bronze 1, n = 1120 rpm, FN = 165N, Validation of the experimental and simulation results Brass 2, n = 820 rpm, FN = 240N, Validation of the experimental and simulation results Temperature distribution of the disc of the test brass 1, n = 820 rpm, F = 165 N, (a) Temperature distribution at 400 revolutions, (b) Temperature distribution at 1000 revolutions, (c) Temperature distribution at 1600 revolutions, (d) Temperature distribution at 1800 revolutions, (e) Temperature scale in °C Temperature distribution of the pad of the test brass 1, n = 820 rpm, F = 165 N, (a) Temperature distribution at 400 revolutions, (b) Temperature distribution at 1000 revolutions, (c) Temperature distribution at 1600 revolutions, (d) Temperature distribution at 1800 revolutions, (e) Temperature scale in °C Heat flux Wear rate Volume loss Univ.-Prof. Dr.- Ing. Bernd Markert Principal Researcher:
