parameter

symbol

parameter

symbol

deformation of the sealing element in the axial direction

w

instantaneous modulus of elasticity

deformation of the sealing element in the radial direction

u

elasticity modulus

radial, tangential, axial and shear deformations

, , ,

shear modulus of the sealing material

G

radial, axial and tangential stress

, ,

friction coefficient between the washer and the end of the sealer

hydrostatic pressure function

s

dynamical viscosity of the material of the sealing element

gap between its outside surface and rigid cylinder wall

bed ratio

height of the sealer

H

axial loads necessary for first and full contact of the outer surface of the sealing element with the cylinder wall

Q, P

inner and outer radii of the sealer

,

medium’s pressure

outer radius of the rigid cylinder

Kronecker’s symbol