Learning Forum

[Muzamil Ali]

I am performing some nonlinear contact debonding simulations in ANSYS Mechanical. I am having some convergence issues, which I am able to resolve by increasing the number of substeps, which is computationally very expensive. In my simulations, I am only interested in parameterizing the maximum peak reaction force at a boundary condition (encircled in red in the first picture). The unconvergence always occur after the peak reaction force is reached and I am always able to get the peak force value, which is good. However, since the overall solution does not converge the solution is marked as red (as an error) and no data is retained in "Parameter Set" as shown in the 2nd picture.

I don't have any knowledge of ANSYS APDL. Is there any simple way such that only converged substeps' data is retained in the solution when the whole solution is not converged? I know the unconverged substep number is always set as 999999. Is there any simple APDL command I can put somewhere in the ANSYS Mechanical model tree to make the solution green, so that only converged substeps' data is retained in the solution and the Peak Force value appears in the "Parameter Set."

 

 Any help would be much appreciated! (Note: Pictures below are just for an example)

[Lydia]

Hello,

You can try and retain the design point data of your analysis. You can do that by following the proceedure described in the doc link

[Muzamil Ali]

I am now able to access the link. However, my issue is not resolved. 

I am able to retain the whole data, but it does not automatically fill the "Parameter Set" cells, which is essential for optimization. I want the peak load to be automatically filled in "Paramter Set" cells.

 

[Lydia]

The reason why the cells are not automatically filled is because your analysis is not converged. And the software cannot know that the local maximum already computed is the total maximum of the converged analysis.

I believe you should try and solve your convergence problem first.

[Muzamil Ali]

Thanks!,

Sorry, the link you sent is not taking me anywhere. 

The screenshot is attached.