Influence of the lubricating agent on the properties of contact joints

The paper presents nonlinear mathematical models describing the properties of dry and lubricated contact joints loaded in the normal direction within the range 0.5-2.5 MPa. The surfaces of joints were coated with an assembly paste and with a hydraulic oil. The dependences of the energy dissipation coefficient $ {\mps}$ as a function of the load for applied lubricating agents were presented. The structure of the models was determined on the basis of the experimentally determined spectral-response characteristics of the relative displacements of the nominal contact of the surface and of the contact load in the normal direction. The forms of the functional factors of models were estimated using the methods of the linear regression analysis.