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Issues on Contact between surfaces not initially in contact

Posted 2025年5月5日 GMT-4 04:54 Structural Mechanics 0 Replies

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I have been working so far on initially in contact surfaces and computing Time-dependent studies as well as stationary studies, which both have been working so far.

However, upon starting with surfaces not initially in contact; i have been only able to use stationary studies in order to achieve convergence. In order to use a model i was assured would work, i have been conducting tests with the Cylinder Roller Contact model of the application galery. (https://www.comsol.com/model/cylinder-roller-contact-1431)

By replacing the stationary studies with time dependent studies, i have been subject to constant crashes of my simulations, as the step of the surfaces entering in contact appears to not be handled correctly, allowing penetration and thus crashing the calculus.

Also, the convergence of stationary studies appears to also be heavily dependent of the initial distance between the two blocks in the model, where increasing it causes longer computation time, and upon a certain limit, the study cannot converge anymore.

I would like to understand better why i am encountering these two issues, and if there are any solutions to them, as they both pose a major problem in my research.

Yours sincerely

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