Abstract
As an essential part of the transmission, the life of the clutch directly affects the stability of the transmission. In this paper, a finite element model and a thermodynamic numerical model of a multi-disc clutch are established to investigate the influence of material parameters on the contact pressure distribution. The pressure distribution index (PDI) is firstly proposed to evaluate the pressure difference among friction pairs. Moreover, the correctness of the numerical model is verified by the clutch static pressure experiment. The results show that increasing the elastic modulus and Poisson’s ratio of the backplate can effectively improve the uniformity of the contact pressure. However, the variations in material parameters of other clutch components can not easily smooth the pressure difference. Therefore, optimized material parameters for the clutch are proposed, where the maximum pressure and temperature differences are reduced by about 27.2% and 10.3%, respectively.
Highlights
The wet multi-disc clutch, determining the reliability and safety of the transmission, has always been pivotal in vehicle transmissions [1,2]
Li et al [8] and Zhao et al [9] studied the thermal buckling phenomenon of clutches via sliding experiments and finite element analysis. They suggested that buckling occurred when temperature distribution was non-uniform in the radial direction
pressure distribution index (PDI) is employed to evaluate the influence of different materials on the radial pressure distribution
Summary
The wet multi-disc clutch, determining the reliability and safety of the transmission, has always been pivotal in vehicle transmissions [1,2]. Yu et al [6] investigated the wear mechanisms of copper-based and paper-based friction materials, indicating that the wear depth increased dramatically with the ambient temperature increase. Zhao et al [7] verified the dramatic influence of temperature on wear characteristics via pin-on-disc tests. Li et al [8] and Zhao et al [9] studied the thermal buckling phenomenon of clutches via sliding experiments and finite element analysis They suggested that buckling occurred when temperature distribution was non-uniform in the radial direction. PDI is employed to evaluate the influence of different materials on the radial pressure distribution. PDI is employed to evaluate the influence of different materials o3nof t1h4e radial pressure distribution.
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