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Modeling rigid components
Posted Jun 3, 2013, 1:28 p.m. EDT Materials, Mesh, Structural Mechanics Version 4.2a 2 Replies
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I am working on a contact model where one object is much stiffer than the other. In other modeling programs I have used it is possible to assume the very stiff surface is infinitely rigid (Analytical rigid is the term for this in Abaqus) so that this geometry does not have to be solved for. Is there some similar functionality in Comsol? Thanks!
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The way to do it in COMSOL Multiphysics is
1. Use the rigid part as 'source' in the contact pair.
2. Use 'Fixed' or 'Prescribed displacement' at the domain level for the rigid part.
3. The mesh on the rigid part should resolve curvatures well, but apart from this, it can (and should preferably) be very coarse.
4. The rule about the relations between mesh density on destination side relative to mesh density on source side does not apply in this case. Any suitable mesh can be used on the destination side.
Examples of this can be found in the models tube_connection and hyperelastic_seal in Model Library.
Regards,
Henrik
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-Chris