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Contact modelling in a flexion test
Posted Dec 11, 2019, 3:39 p.m. EST Structural & Acoustics, General Version 5.4 0 Replies
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Hi, trying to learn a bit more about contact modelling.
I'm trying to model a simple three point flexion test, with a piece of metal between three rollers, the one on top moves down with a given force, the two on the bottom do not move. However, since a Stationary model did not converge, I decided to do a Time Dependent model to see how the assembly was reacting to the force.
To my surprise, what happens is that the roller that exerts the force bounces of the metal piece, even though the force is not too big and is always acting downward (and if I make it bigger the model will also not converge).
I would appreciate any feedback as to why this happens, since I can't explain it. I'm using Penalty factor method for the contact analysis since the Lagrangian causes the top roller to penetrate the metal piece and I'm still not sure of which adjustments to make to avoid this.
Have a good day.
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Hello Alfredo
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