Learning Forum

[Deepak Kumar]

Hi! Can anyone please suggest me why is the erroe shown in the scrnshot is occuring and what i can do to resolve it.

1. The solver engine was unable to converge on a solution for the nonlinear problem as constrained.  Please see the Troubleshooting section of the Help System for more information.
2. Element 22098 located in Body "BOWL FOR STP\Solid" (and maybe other elements) has become highly distorted.  You may select the offending object and/or geometry via RMB on this warning in the Messages window.  Excessive distortion of elements is usually a symptom indicating the need for corrective action elsewhere.  Try incrementing the load more slowly (increase the number of substeps or decrease the time step size).  You may need to improve your mesh to obtain elements with better aspect ratios.  Also consider the behavior of materials, contact pairs, and/or constraint equations.  If this message appears in the first iteration of first substep, be sure to perform element shape checking. Named Selections for the offending element can be created via the Identify Element Violations property on the Solution Information Object.

[peteroznewman]

Try incrementing the load more slowly (increase the number of substeps or decrease the time step size). 

You do that under Analysis Settings.  Show a screen snapshot of your analysis settings before and after you make a change.

Named Selections for the offending element can be created via the Identify Element Violations property on the Solution Information Object.

Do that and look at where the element that has become highly distorted is located. Reply with a screen snapshot.

 You may need to improve your mesh to obtain elements with better aspect ratios.

You do that by simplifying the geometry, especially near the highly distorted elements. You may get better element shapes by slicing the solid into pieces and reassembling the pieces using the Share button in SpaceClaim.

[Zoi Stavrothanasi]

Thank you Peter for your helpful insights!

[Zoi Stavrothanasi]

Hello Deepak,

The cause of errors with highly distorted elements may vary, and the error messages provide clues to the areas you may need to consider for resolving your non-convergence issue. Firstly, I would suggest refining your model by reducing the element size to capture more details. Additionally, adding more steps through Analysis Settings > Step Controls can help in achieving convergence. Since you are modeling a non-linear problem, activating large deflection via Analysis Settings > Solver Controls is necessary. I hope these suggestions help!

[Deepak Kumar]

Thank you Peter and Zoi for the helpful insights! 

I hav successfully solved the model by increamenting the load steps in the analysis settings. Thanks for the support.