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M. Lamzoughi

non-convergence by nonlinear-quasi-static Analysis

Question

Hello everybody,

I’m running a nonlinear-quasi-static analysis with OptiStruct and I have got some troubles with convergence.

What I exactly did is, running the same analysis for the same model but with different element sizes and when I mesh with very small size othewise by small size elements I get that problem with non convergence.

image.png.b51eedd2bd59e2b60bfff20bc7498d7d.png

 

My model is built of 2 parts, the first one is fixed from one side and the other one presses the first part through radial and axial forces, between those parts I've built a contact. (see the following figure) 

image.png.6b19a0cf2d3996dcc2fe9182fc1cb8b0.png

 

You find attached an Excel-file where some results are showed, so you can get a good idea about.

It would be kind of you if you could help me to solve this problem.

 

Thank you in advance

Best Regards

M. Lamzoughi

 

 

comparison.xlsx

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2 answers to this question

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Hi,

 

Can you only refine mesh where the contact happens and leave the rest as it is and check if that helps?

 

Also, can you please share .out files from converged and non-converged runs?

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