ComputeAxisymmetric1DSmallStrain.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#include "ComputeAxisymmetric1DSmallStrain.h"
#include "UserObject.h"

registerMooseObject("SolidMechanicsApp", ComputeAxisymmetric1DSmallStrain);

InputParameters
ComputeAxisymmetric1DSmallStrain::validParams()
{
  InputParameters params = Compute1DSmallStrain::validParams();
  params.addClassDescription("Compute a small strain in an Axisymmetric 1D problem");
  params.addParam<UserObjectName>("subblock_index_provider",
                                  "SubblockIndexProvider user object name");
  params.addCoupledVar("scalar_out_of_plane_strain", "Scalar variable for axisymmetric 1D problem");
  params.addCoupledVar("out_of_plane_strain", "Nonlinear variable for axisymmetric 1D problem");

  return params;
}

ComputeAxisymmetric1DSmallStrain::ComputeAxisymmetric1DSmallStrain(
    const InputParameters & parameters)
  : Compute1DSmallStrain(parameters),
    _subblock_id_provider(isParamValid("subblock_index_provider")
                              ? &getUserObject<SubblockIndexProvider>("subblock_index_provider")
                              : nullptr),
    _has_out_of_plane_strain(isCoupled("out_of_plane_strain")),
    _out_of_plane_strain(_has_out_of_plane_strain ? coupledValue("out_of_plane_strain") : _zero),
    _has_scalar_out_of_plane_strain(isCoupledScalar("scalar_out_of_plane_strain"))
{
  if (_has_out_of_plane_strain && _has_scalar_out_of_plane_strain)
    mooseError("Must define only one of out_of_plane_strain or scalar_out_of_plane_strain");

  if (_has_scalar_out_of_plane_strain)
  {
    const auto nscalar_strains = coupledScalarComponents("scalar_out_of_plane_strain");
    _scalar_out_of_plane_strain.resize(nscalar_strains);
    for (unsigned int i = 0; i < nscalar_strains; ++i)
      _scalar_out_of_plane_strain[i] = &coupledScalarValue("scalar_out_of_plane_strain", i);
  }
}

void
ComputeAxisymmetric1DSmallStrain::initialSetup()
{
  ComputeStrainBase::initialSetup();

  if (getBlockCoordSystem() != Moose::COORD_RZ)
    mooseError("The coordinate system must be set to RZ for Axisymmetric geometries.");
}

Real
ComputeAxisymmetric1DSmallStrain::computeStrainYY()
{
  if (_has_scalar_out_of_plane_strain)
    return (*_scalar_out_of_plane_strain[getCurrentSubblockIndex()])[0];
  else
    return _out_of_plane_strain[_qp];
}

Real
ComputeAxisymmetric1DSmallStrain::computeStrainZZ()
{
  if (!MooseUtils::absoluteFuzzyEqual(_q_point[_qp](0), 0.0))
    return (*_disp[0])[_qp] / _q_point[_qp](0);
  else
    return 0.0;
}