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Input Files

Model Files (0.6 MB)


This is a simple example of the installation of a Rubber O-Ring Seal

Options and Keywords Used

Keyword documentation may be found in the reference guide available from

OpenRadioss User Documentation

  • /IMPDISP/FGEO Imposed Displacement to a final reference geometry

  • /INTER/TYPE7 Contact with ‘Tstart’ Time to delay contact start

  • /MAT/LAW42 Ogden Rubber Material for Seal

Model Description

O-Ring, Seat and Tool

2 Contacts (Tool to O-Ring, and Seat to O-Ring)


Units: mm, s, Tonnes, N, MPa

Model Method

The O-Ring starts off inside (and smaller than) the seat in which it is to be installed


The contact between the O-Ring and it’s seat is not switched on, until later in the simulation, when the tool is then retracted again allowing the seal to settle back into position


Simple method to pre-position a seal