NSEL multistep analysis problem

[bigety]

Hello guys,

I am trying to solve an issue for the last few days, but with no success and on this line, I would like to ask for your help!

It is a very simple geometry (one small dog-bone sample with linear material - steel) for which I would like to select the elements with the stress over 7500MPa.
I have created 20 steps (end time 20s, final displacement 2mm) and I have inserted the following APDL.

! Commands inserted into this file will be executed just prior to the ANSYS SOLVE command.
outres,esol,last,elem_to_kill_body
nsel,s,s,eqv,7500
esln
ekill,all
allsel

Following the execution, I get the problem.

>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<
The requested S data is not available. The NSEL command is ignored.

I have also tried to work with "NSEL,S, EPEL,....", but I get the same error.

I look forward to your input.

Thank you in advance,
Andrei

 

[scheah]

Hi Andrei,

I'm guessing you're doing "NSEL,S,S,EQV,7500" command while in the /SOLU processor which yielded the error. Try looking up Multiframe Restart. This would allow you to switch to /POST1 and then back to /SOLU.


Best regards,
Jason

 

[scheah]

Hi Andrei,

I think I'm mistaken in my earlier comments. Please see this Simutech Group blog post [URL unfurl="true"]https://www.simutechgroup.com/tips-and-tricks/fea-articles/339-fea-tips-tricks-ansys-ekill-element-death[/url] that does what you are after.

The trick was to first write the results to the database:

fini
/config,noeldb,0 ! write results into the database
/solu ! continue with solution

Apologies,
Jason