I.D.A New Model for the Design of Tight Interference Fit Taking Into Account the Surface Texture M.M.E'2000

International audience; The tight interference fit is very largely applied in industry, but, in all proposed models of calculation, one supposes that the contact interfaces are always perfect which leads us to establish some limits which are not only contrary to the grip principle but also greatly increase production costs. This paper presents a new model that takes into account the macro and micro-geometrical defects for calculating the contact pressure. We show that it is possible to reduce the cost and assure the fit resistance. The form defect can be integrated in FEM codes and the surface texture can be represented by a loss of interference due to the plastic strains of the asperities.…