Aim:

Model:

A 2D axisymmetric model of the rubber boot was used. The mesh consists of the higher order rectangular elements. The elastomer material behavior is simulated using a 2 parameter Mooney-Rivlin material model. The displacement and pressure boundary conditions (20 psi) are shown in the neighboring image. Contact and target elements are generated on the same surfaces that are likely to establish a self-contact.

Maximum Radial Displacement vs. Fluid Pressure 

Discussion:

The deformed shape of the boot is shown in the adjacent image. It was confirmed that the boot inside surface was not in contact with the pin. The boot inside surface contacts itself during the deformation. The contact pressure was not too great to worry. The maximum radial displacement of the boot as a function of the pressure is plotted. The relation between the maximum radial displacement and the fluid pressure is fairly linear.

Contact Pressure