Timeline for Non-Linear Analysis Convergence Problem in Ansys
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| May 10, 2022 at 14:52 | comment | added | meshWorker | For example a local variation in thickness. Or a small hole. Something which in size and shape can be explained by the production of the geometry. | |
| May 10, 2022 at 14:45 | comment | added | hansophyx | Do you know how can I introduce an imperfection in a shell element? | |
| May 10, 2022 at 14:29 | comment | added | meshWorker | Adding a small imperfection into the geometry can sometimes stabilize a model. When you know where the model is unstable you could emphasize for example a production tolerance. This way the solver "knows" in which direction to look. | |
| May 10, 2022 at 13:58 | comment | added | hansophyx | Thank you for those suggestions! I tried all of the above and turning off all of those nonlinearities still does not causes convergence. Relaxing BCs helps to avoid plasticity indeed, but the solution still does not converge. The only measure is increasing sheet thickness which reduces temperature and helps with mechanical stability. I suspect a stability issue to be the problem so I am now trying to use the arc length method to obtain convergence. | |
| May 9, 2022 at 14:19 | history | edited | meshWorker | CC BY-SA 4.0 |
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| May 9, 2022 at 14:04 | history | edited | meshWorker | CC BY-SA 4.0 |
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| May 9, 2022 at 11:57 | history | edited | meshWorker | CC BY-SA 4.0 |
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| May 9, 2022 at 10:33 | history | edited | meshWorker | CC BY-SA 4.0 |
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| May 9, 2022 at 6:52 | history | edited | meshWorker | CC BY-SA 4.0 |
added MPC replacement
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| S May 9, 2022 at 6:46 | review | First answers | |||
| May 10, 2022 at 13:29 | |||||
| S May 9, 2022 at 6:46 | history | edited | meshWorker | CC BY-SA 4.0 |
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| S May 9, 2022 at 5:21 | review | First answers | |||
| May 9, 2022 at 5:38 | |||||
| S May 9, 2022 at 5:21 | history | answered | meshWorker | CC BY-SA 4.0 |