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solids4Foam: Restart of solid-solid contact cases not working for some cases

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Old   March 21, 2022, 12:15
Question solids4Foam: Restart of solid-solid contact cases not working for some cases
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Conrado Zanutto
Join Date: Dec 2021
Location: Portugal
Posts: 3
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Dear All,

I've been running a solid-solid contact case that consists of a spring compression and is very similar to the tutorial case "pipeCrush" (/tutorials/solids/elastoplasticity/pipeCrush).

As the "solidModel" I'm using "nonLinearGeometryUpdatedLagrangian" with the "neoHookeanElastic" to evaluate the stress tensor. To control the displacement of the top plate (the one that compresses the spring), I'm using a "timeVsDisp" table.

I'm facing a problem which I didn't manage to solve, which occurs when I restart the case. I have tried different ways to perform the restart, namely:

1 - Simple restart by setting "startFrom" to "latestTime" in the controlDict;
2 - Use mapFields (e.g.: mapFields /home/CaseToRestart -sourceTime "last time") and follow 1;
3 - Copy the results from the last time-step to the "0" folder, modify the "timeVsDisp" table accordingly and run the case from the "startTime".

None of the three alternatives above has been able to properly restart the cases. For instance, what happens for each of the three alternatives above is:

Alternative 1 - I get the following message:
"...
setCellDisplacements: reading cellDisplacements
Floating point exception (core dumped)"
Alternative 2 - I get the following message:
"...
setCellDisplacements: reading cellDisplacements
Corr, res, relRes, matRes, iters
Floating point exception (core dumped)"
P.S.: Even if I update the "timeVsDisp" table by using linear interpolation or by taking the value from Paraview, I get this error message.
Alternative 3 - I get the following message:
"...
setCellDisplacements: reading cellDisplacements
Corr, res, relRes, matRes, iters
Floating point exception (core dumped)"

I have also tried to follow similar procedures with the tutorial cases "pipeCrush" (/tutorials/solids/elastoplasticity/pipeCrush) and "cylinderCrush" (/tutorials/solids/elastoplasticity/cylinderCrush), but it also doesn't work.

The case I have been running is very similar to the tutorial case "pipeCrush" (/tutorials/solids/elastoplasticity/pipeCrush) without taking into account the "plasticStrainVsYieldStress" table (just using neoHookeanElastic in the "mechanicalProperties").

Do you have any idea why the restart is not working for these cases? Do you have any alternative suggestions for trails I can make to be able to restart the cases?

Thank you so much for your time and attention.

Kind regards,
Conrado
anaspauzi and W Mao like this.

Last edited by conza; March 22, 2022 at 06:59.
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celldisplacements, contact algorithm, restart problem, solid-solid contact, solids4foam

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