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[swak4Foam] elastoPlasticBiotFoam solver

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Old   May 12, 2020, 17:57
Default elastoPlasticBiotFoam solver
  #1
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Angel Malaguera
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Hello everyone..
I am trying to simulate Terzagui's problem with elastoPlasticBiotFoam solver (Tian Tang code) using OpenFoam 1.6-ext. The following error appears:

-> FOAM FATAL ERROR:

request for volTensorField grad(U) from objectRegistry region0 failed
available objects of type volTensorField are

1
(
grad(dU)
)


From function objectRegistry::lookupObject<Type>(const word&) const
in file /home/angel/OpenFOAM/OpenFOAM-1.6-ext/src/OpenFOAM/lnInclude/objectRegistryTemplates.C at line 140.

FOAM aborting

The column is 3 m high and has an applied load of -120,000 Pa

The error is related to the boundary condition U.
I defined the U file as follows:


/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM Extend Project: Open Source CFD |
| \\ / O peration | Version: 1.6-ext |
| \\ / A nd | Web: www.extend-project.de |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
location "0";
object dU;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 0 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
right
{

type zeroTotalTraction;

}

left
{

type zeroTotalTraction;

}

front
{
type empty;

}

soilStructureInterface
{

type fixedTotalTraction;

traction uniform (0 0 -120000);
pressure uniform 0;
value uniform (0 0 0);

}

back
{
type empty;

}

soilDomainBottom
{

type fixedDisplacementZeroShear;
value uniform (0 0 0);

}


}

// ************************************************** *********************** //

I will be grateful for any suggestion..

Thanks... Angel
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Old   May 13, 2020, 16:07
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HPE
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Hi,

- Is there any functionality in your setup that requests `grad(U)`? Like a function object may be? The error message clearly suggests that this request cannot be fulfilled because the only available object registered to the objectRegistry is `grad(dU)`.
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Old   May 13, 2020, 17:08
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Angel Malaguera
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Quote:
Originally Posted by HPE View Post
Hi,

- Is there any functionality in your setup that requests `grad(U)`? Like a function object may be? The error message clearly suggests that this request cannot be fulfilled because the only available object registered to the objectRegistry is `grad(dU)`.
Hello Mr. Herpes .. Thanks for your reply

grad (U) is defined as a field. That error appears when I use the fixedDisplacementZeroShear boundary condition. That boundary condition is from the soilEpTLFoam solver of the same Tian Tang code. I would like to know if someone from the community has used the Tian Tang code

https://bitbucket.org/tiantang/minigeotechfoam.git

and they have solved the terzagi problem. My problem is that the pressure field coincides with the analytical results but the displacement field gives exactly double.

Any hold would appreciate

Thanks angel
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