Stacked flow plates - model simplification

Which version of PrePoMax are you using ? What happens if you click OK ?

Am using PrePoMax v2.1.0

If I click on OK it behaves a bit like if I’d actually asked the analysis to run - but sits there doing very little - Memory usage sits at around 5GB. If I then click results button.

I’ll leave it ‘cooking’ and see what happens.

It looks like it was trying analysis, but failed

*ERROR in u_calloc: error allocating memory
variable=stx, file=linstatic.c, line=357, num=295674030, size=8

I’ll try further simplification of the mesh and/or removing a pre-tension step in the analysis.

This might happen sometimes, but it should not prevent the simulation from running. Unfortunately, there is no tool to remove these hidden internal sets.

After some more model simplification in a new project I got analysis to run - Pardiso solver failed (with no informative messages). Tried other solvers - have got one running now - am wondering after 36+ hours if this is likely to complete.
Convergence output attached, but what is the completion condition…?

  • largest residual force at the end of iteration ≤ 0.005 * iteration-averaged average force of all iterations within the current increment excluding the current iteration AND
  • largest change in displacement in the current iteration ≤ 0.01 * largest change in displacement in the current increment OR
  • estimate of the largest displacement correction in the next iteration < 0.01 * largest change in displacement in the current increment

After 9 iterations, the first criterion is relaxed and alternative tolerance of 0.02 is used instead of 0.005.

Those criteria can be changed with solution controls settings but it’s not recommended in most cases.

Maybe you should try with even coarser mesh just to see if it solves properly and then try refining.

Back to trying this again after making mesh coarser. I keep getting the following message even though I’ve turned off Non-linear for the Step.

*WARNING reading *STATIC: a nonlinear analysis is requested
but no time increment nor step is specified
the defaults (1,1) are used

Am I perhaps missing another setting somewhere?