Investigation of clutch hub strength with various geometries under variable torque conditions

The clutch is a component that performs the duty of transmitting the torque generated by the internal combustion engines to the powertrain. The hub component on disc assembly is one of the most important components in this transmission process. During operation under torque conditions, a hub is supposed to withstand the radial loads. For this purpose, the structural strength analysis of the hub is of importance. In this study, the hub component of the clutch disc assembly is analyzed to simulate real driving conditions. In this analysis, analytical calculations and finite element calculations were made for different hub structures. By comparing the two calculations, the precision of the design and the reasons of failures were determined. According to FEA results, the maxımum principal stress occurs in the contact regions where the pressure is applied. With respect to these results, the damage locations are compared to the parts which have been subjected to real bench test, and cracks/breaks occurred. After the tests, damage analysis was performed for fractures. This study enables the assumptions of the hub resistance under the various dynamic conditions with different hub geometry. Furthermore, this novel study provides the cost and time-saving in terms of the design phase in automotive engineering.

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  • [1] Patil, H., Jeyakarthikeyan, P. V. 2018. Mesh convergence study and estimation of discretization error of hub in a clutch disc with the integration of ANSYS, 2nd International Conference on Advances in Mechanical Engineering.
  • [2] Xintian, L., Yansong, W., Lihui, Z., Yanfeng, X., Hui, G. 2013. The analysis of structural strength of UD clutch hub assembly, Applied Mechanics and Materials Vols. 303-306, pp 2754-2757
  • [3] Liu, C., Liu, X., Huang, H., Zhao, L. 2009. ‘Simulation Research on Structural Strength of the Hub Plate’, Proceedings of the 2008 IEEE International Conference on Robotics and Biomimetics Bangkok, Thailand, February 21 – 26.
  • [4] Gul, C., Genc, M.O., Durmus, A. 2019. Shock strength investigation of sintered clutch disc hub experimentally with a modified Charpy test bench. International Conference on Artificial Intelligence and Applied Mathematics in Engineering, Antalya, Turkey
  • [5] Valeo Automotive Systems, “Technical Documentation” 2016, Bursa, Turkey
  • [6] H. Serizawa, Z. Wu, H. Murakawa. 2001. Computational Analysis of Charpy Impact Tests Using Interface Elements, Transactions of JWRI, Vol. 30, pp 97-102.
  • [7] K. M. Kumar, M.R. Devaraj, H.V. LakshmiNarayana. 2012. Finite Element Modelling for Numerical Simulation of Charpy Impact Test on Materials.’’ International 10 Conference on Challenges and Opportunities in Mechanical Engineering, Industrial Engineering and Management Studies, pp 32-36.
  • [8] A, Emamian. 2012. A Study on Wear Resistance, Hardness and Impact Behaviour of Carburized Fe-Based Powder Metallurgy Parts for Automotive Applications, Materials Sciences and Applications, Vol.3, pp 519-522.
  • [9] Gul, C., Genc, M.O., Durmus, A. 2017. Numerical estimating the shock strength of automobile clutch disc hub, 6th International Conference on Advances in Mechanical and Robotics Engineering, pp.16-19, Roma, Italy.