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A problem with time dependent contact mechanics
Posted 2011年4月4日 GMT-4 16:16 Structural Mechanics Version 4.1 0 Replies
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I am a new user of COMSOL and I've recently come across a problem with a time dependent contact mechanics model.
Basically what I have is some kind of a cylinder expanding and getting into contact with an annulus structure (initially, there was a gas between the cylinder in the center and the annulus on the outside). I created a 2-D geometry and created contact and identity pairs. The problem happens right when the two structures get in contact. If I set the penalty factor too big, then I get a convergence problem. If I set the penalty factor small enough, I was able to avoid the convergence problem but I was running into un-realistic physical phenomenon - inner cylinder structure expand INTO the outer annulus structure. If I run the problem long enough, the cylinder could even totally penetrate the annulus structure which is supposed to stop or reduce the expansion.
I wonder if I can get some help or insights into how to realistically model this contact here. Thank you so much!
Best,
Di
Hello Di Yun
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