Numerical analysis of thermal problem in dry friction clutches based on the interactive design approach

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TECHNICAL PAPER

Numerical analysis of thermal problem in dry friction clutches based on the interactive design approach Mahir H. Majeed1 · Dheyaa Eesa Kadhim1 · Oday I. Abdullah2,3 · Josef Schlattmann3 Received: 25 June 2019 / Accepted: 26 February 2020 © Springer-Verlag France SAS, part of Springer Nature 2020

Abstract During the engagement, the thermo-elastic behavior of the friction clutches over specific sliding periods was taken into consideration as an essential factor to obtain a successful design based on interactive approach for automotive engineers that voided premature failure. It is worth mentioning that the finite element technique was adopted in the current study to investigate and analyze the angular sliding speed influence on the generated heat due to friction among the elements of friction clutch at the initial period of engagement. The distributions of the heat generated during the complete sliding periods were achieved via coupling between the thermal and the elastic models analyses to obtain the solution that required by automotive designers. Results in the form of the distributions of generated heat due to friction, temperatures of surface, and contact pressure are presented for different values of sliding speed. Obviously, the results showed that the frictional heat generated was increased dramatically when the sliding speed increased too. Also, it was proved that the proposed interactive design approach succeeded to detect the status of the friction clutch system if it’s stable or not. Keywords Dry friction clutches · Thermo-elastic problem · Generated frictional heat

1 Introduction Indeed, the knowledge of the essential factors that affects the lifetime and behavior of thermo-elastic models for the friction clutch is considered as a crucial issue in industry field. Substantially, the interaction among the essential factors and design parameters for the system of clutch is considered important point for the automobile engineers to select its optimal values of design parameters. Owing to the sliding between the contact elements of a clutch system, the high surface temperatures will be appeared. The main elements (clutch disc, flywheel and pressure plate) of the single-disc clutch are explained in Fig. 1. High-temperature is considered one of the main causes of drawbacks that appear on the contacting surfaces such as cracks, plastic deformations, hot

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Oday I. Abdullah [email protected]

1

Al Furat Al-Awsat Technical University, Najaf, Iraq

2

Department of Energy Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq

3

System Technologies and Engineering Design Methodology, Hamburg University of Technology, Hamburg, Germany

spot, etc. Additionally, all the mentioned circumstances may cause the premature damage in the clutch parts. The thermal behavior, dissipation of energy and performance of many types of dry friction clutches under different conditions of work were investigated by Abdullah et al. [1–10]. Also, surface roughness influence of the clutch discs on