Plasto‐elastohydrodynamic lubrication performance of greased ellipsoid contact

Abstract

The plasto-elastohydrodynamic lubrication (PEHL) model of the greased ellipsoid contact is established and solved numerically. In doing so, the increment theory of the plastic surface is adopted to solve the residual deformation, and the fast Fourier transform (FFT) method is employed to accelerate the deformation and stress calculations. Meanwhile, the effeteness of the PEHL model is verified through the residual stress experiment and finite element method. It is found that the plastic behaviour results in a reduction in the maximum grease film pressure. Under heavy load conditions, the grease with large rheology index, large tangential modulus or high entrainment speed of the lubricant is helpful to reducing the maximum residual deformation and maximum residual stress of the greased ellipsoid contact.

Numerical study on mixed thermal-elastohydrodynamic lubrication of grease lubricating lubricated spiral bevel gear for heavy-duty unmanned aerial vehicle

“…48 The results are shown in Figure 11; the detailed parameters are not repeated in this article; please check reference. 48…”

“…47 The central and minimum oil film thicknesses calculated using the proposed model are compared with the results calculated using the model in reference. 48 The results are shown in Figure 11; the detailed parameters are not repeated in this article; please check reference. 48 Through comparison, the trends of the present and existing models are the same over the entire range of test data.…”

“…48 The results are shown in Figure 11; the detailed parameters are not repeated in this article; please check reference. 48 Through comparison, the trends of the present and existing models are the same over the entire range of test data. The difference is that the present and exisiting models are separated in the high-speed area, and the maximum difference is 46 μm.…”

The influence of surface topography on mixed plasto-elastohydrodynamic lubrication in point contacts

“…Wang et al 25 presented a fast numerical contact model based on a DC-FFT method adapted to solve elastoplastic contact problems with partial slip. Maier et al 26,27 developed PEHL models for ellipsoidal and point contacts, and verified the validity of the models by experiments and FEM.…”