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Self-contact

Posted 03.08.2018, 04:21 GMT-4 1 Reply

Valery Anpilov
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Dear colleagues, please let me know: Is COMSOL capable of contact modeling with self-intersections? Regards Valery

1 Reply Last Post 07.08.2018, 08:31 GMT-4
Henrik Sönnerlind COMSOL Employee

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Posted: 6 years ago 07.08.2018, 08:31 GMT-4

Hi Valery,

This is formally not supported, but if you can live with a few quirks, it is possible. Just select the same set of boundaries as source and destination in the contact pair.

The local stress solution at the contacting boundaries may not be that accurate (since you have to violate the criterion that the destination side mesh should be finer than that on the source side).

Also, the contact pressure evaluation is tricky (part of it will appear on each side).

But as long as you are only interested in avoiding that something folds onto itself in a more global sense, it is quite useful.

Regards,
Henrik

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Henrik Sönnerlind
COMSOL
Hi Valery, This is formally not supported, but if you can live with a few quirks, it is possible. Just select the same set of boundaries as source and destination in the contact pair. The local stress solution at the contacting boundaries may not be that accurate (since you have to violate the criterion that the destination side mesh should be finer than that on the source side). Also, the contact pressure evaluation is tricky (part of it will appear on each side). But as long as you are only interested in avoiding that something folds onto itself in a more global sense, it is quite useful. Regards, Henrik

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