METHOD FOR ESTIMATING THE SEAL OF A GASKET

摘要

The invention relates to a method for estimating the seal of a gasket, comprising the following steps: digitally simulating, using a computer, a creep deformation of the gasket resulting the from crushing of the gasket between two bearing surfaces; calculating, at an interface between the gasket and one of the two bearing surfaces and during the computer simulation, a cumulative plastic deformation p of the gasket, an axial stress Smzz between the gasket and said one the two bearing surfaces, and a contact length Lc between the gasket and said one of the two bearing surfaces; and calculating a simulated porosity filling coefficient, representing the seal of the gasket at said interface such that (I), where: ?, a, and ß are coefficients, the values of which depend on the material of the gasket; re and ri are outer and inner radii of the deformation of the gasket in m; r is the position along the contact between the gasket and said one of the two bearing surfaces, where Lc = re - ri in m; Smzz is the axial stress in Pa; s seuil is the threshold stress equal to 1 MPa; p is the cumulative plastic deformation; pmax is the maximum value of p during the simulation; and P 0 is a constant equal to 1.