www.mooseframework.org
Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
ComputeRSphericalIncrementalStrain Class Reference

ComputeRSphericalIncrementalStrain defines a strain increment only for small strains in 1D spherical symmetry geometries. More...

#include <ComputeRSphericalIncrementalStrain.h>

Inheritance diagram for ComputeRSphericalIncrementalStrain:
[legend]

Public Member Functions

 ComputeRSphericalIncrementalStrain (const InputParameters &parameters)
 

Protected Member Functions

virtual void initialSetup () override
 
virtual void computeTotalStrainIncrement (RankTwoTensor &total_strain_increment) override
 Computes the current and old deformation gradients with the assumptions for 1D spherical symmetry geometries: \( \epsilon_{\theta} = \epsilon_{\phi} = \frac{u_r}{r} \). More...
 
virtual void computeProperties () override
 
virtual void initQpStatefulProperties () override
 
void subtractEigenstrainIncrementFromStrain (RankTwoTensor &strain)
 

Protected Attributes

const VariableValue & _disp_old_0
 the old value of the first component of the displacements vector More...
 
std::vector< const VariableGradient * > _grad_disp_old
 
MaterialProperty< RankTwoTensor > & _strain_rate
 
MaterialProperty< RankTwoTensor > & _strain_increment
 
MaterialProperty< RankTwoTensor > & _rotation_increment
 
MaterialProperty< RankTwoTensor > & _deformation_gradient
 
const MaterialProperty< RankTwoTensor > & _mechanical_strain_old
 
const MaterialProperty< RankTwoTensor > & _total_strain_old
 
std::vector< const MaterialProperty< RankTwoTensor > * > _eigenstrains_old
 
unsigned int _ndisp
 Coupled displacement variables. More...
 
std::vector< const VariableValue * > _disp
 
std::vector< const VariableGradient * > _grad_disp
 
std::string _base_name
 
MaterialProperty< RankTwoTensor > & _mechanical_strain
 
MaterialProperty< RankTwoTensor > & _total_strain
 
std::vector< MaterialPropertyName > _eigenstrain_names
 
std::vector< const MaterialProperty< RankTwoTensor > * > _eigenstrains
 
bool _volumetric_locking_correction
 
const Real & _current_elem_volume
 

Detailed Description

ComputeRSphericalIncrementalStrain defines a strain increment only for small strains in 1D spherical symmetry geometries.

The strains in the polar and azimuthal directions are functions of the radial displacement.

Definition at line 18 of file ComputeRSphericalIncrementalStrain.h.

Constructor & Destructor Documentation

ComputeRSphericalIncrementalStrain::ComputeRSphericalIncrementalStrain ( const InputParameters &  parameters)

Definition at line 24 of file ComputeRSphericalIncrementalStrain.C.

26  : ComputeIncrementalSmallStrain(parameters), _disp_old_0(coupledValueOld("displacements", 0))
27 {
28 }
ComputeIncrementalSmallStrain(const InputParameters &parameters)
const VariableValue & _disp_old_0
the old value of the first component of the displacements vector

Member Function Documentation

void ComputeIncrementalSmallStrain::computeProperties ( )
overrideprotectedvirtualinherited

Definition at line 27 of file ComputeIncrementalSmallStrain.C.

28 {
29  Real volumetric_strain = 0.0;
30  for (_qp = 0; _qp < _qrule->n_points(); ++_qp)
31  {
32  RankTwoTensor total_strain_increment;
33  computeTotalStrainIncrement(total_strain_increment);
34 
35  _strain_increment[_qp] = total_strain_increment;
36 
38  volumetric_strain += total_strain_increment.trace() * _JxW[_qp] * _coord[_qp];
39  }
41  volumetric_strain /= _current_elem_volume;
42 
43  for (_qp = 0; _qp < _qrule->n_points(); ++_qp)
44  {
45  Real trace = _strain_increment[_qp].trace();
47  {
48  _strain_increment[_qp](0, 0) += (volumetric_strain - trace) / 3.0;
49  _strain_increment[_qp](1, 1) += (volumetric_strain - trace) / 3.0;
50  _strain_increment[_qp](2, 2) += (volumetric_strain - trace) / 3.0;
51  }
52 
54 
55  // Remove the Eigen strain increment
56  subtractEigenstrainIncrementFromStrain(_strain_increment[_qp]);
57 
58  // strain rate
59  if (_dt > 0)
60  _strain_rate[_qp] = _strain_increment[_qp] / _dt;
61  else
62  _strain_rate[_qp].zero();
63 
64  // Update strain in intermediate configuration: rotations are not needed
65  _mechanical_strain[_qp] = _mechanical_strain_old[_qp] + _strain_increment[_qp];
66  }
67 }
const Real & _current_elem_volume
const MaterialProperty< RankTwoTensor > & _total_strain_old
MaterialProperty< RankTwoTensor > & _strain_increment
MaterialProperty< RankTwoTensor > & _mechanical_strain
virtual void computeTotalStrainIncrement(RankTwoTensor &total_strain_increment)
Computes the current and old deformation gradients and passes back the total strain increment tensor...
MaterialProperty< RankTwoTensor > & _strain_rate
void subtractEigenstrainIncrementFromStrain(RankTwoTensor &strain)
const MaterialProperty< RankTwoTensor > & _mechanical_strain_old
MaterialProperty< RankTwoTensor > & _total_strain
void ComputeRSphericalIncrementalStrain::computeTotalStrainIncrement ( RankTwoTensor &  total_strain_increment)
overrideprotectedvirtual

Computes the current and old deformation gradients with the assumptions for 1D spherical symmetry geometries: \( \epsilon_{\theta} = \epsilon_{\phi} = \frac{u_r}{r} \).

Reimplemented from ComputeIncrementalSmallStrain.

Definition at line 40 of file ComputeRSphericalIncrementalStrain.C.

42 {
43  // Deformation gradient calculation in cylindrical coordinates
44  RankTwoTensor A; // Deformation gradient
45  RankTwoTensor Fbar; // Old Deformation gradient
46 
47  // Step through calculating the current and old deformation gradients
48  // Only diagonal components are nonzero because this is a 1D material
49  // Note: x_disp is the radial displacement
50  A(0, 0) = (*_grad_disp[0])[_qp](0);
51  Fbar(0, 0) = (*_grad_disp_old[0])[_qp](0);
52 
53  // The polar and azimuthal strains are functions of radial displacement
54  if (!MooseUtils::relativeFuzzyEqual(_q_point[_qp](0), 0.0))
55  {
56  A(1, 1) = (*_disp[0])[_qp] / _q_point[_qp](0);
57  Fbar(1, 1) = _disp_old_0[_qp] / _q_point[_qp](0);
58  }
59 
60  // The polar and azimuthal strains are equalivalent in this 1D problem
61  A(2, 2) = A(1, 1);
62  Fbar(2, 2) = Fbar(1, 1);
63 
64  // Gauss point deformation gradient
65  _deformation_gradient[_qp] = A;
66  _deformation_gradient[_qp].addIa(1.0);
67 
68  // very nearly A = gradU - gradUold, adapted to cylindrical coords
69  A -= Fbar;
70 
71  total_strain_increment = 0.5 * (A + A.transpose());
72 }
MaterialProperty< RankTwoTensor > & _deformation_gradient
std::vector< const VariableValue * > _disp
std::vector< const VariableGradient * > _grad_disp_old
const VariableValue & _disp_old_0
the old value of the first component of the displacements vector
std::vector< const VariableGradient * > _grad_disp
void ComputeRSphericalIncrementalStrain::initialSetup ( )
overrideprotectedvirtual

Definition at line 31 of file ComputeRSphericalIncrementalStrain.C.

32 {
33  const auto & subdomainIDs = _mesh.meshSubdomains();
34  for (auto subdomainID : subdomainIDs)
35  if (_fe_problem.getCoordSystem(subdomainID) != Moose::COORD_RSPHERICAL)
36  mooseError("The coordinate system must be set to RSPHERICAL for 1D R spherical simulations.");
37 }
void ComputeIncrementalStrainBase::initQpStatefulProperties ( )
overrideprotectedvirtualinherited

Reimplemented from ComputeStrainBase.

Reimplemented in ComputeCosseratIncrementalSmallStrain.

Definition at line 44 of file ComputeIncrementalStrainBase.C.

Referenced by ComputeCosseratIncrementalSmallStrain::initQpStatefulProperties(), and ComputeIncrementalStrainBase::~ComputeIncrementalStrainBase().

45 {
46  _mechanical_strain[_qp].zero();
47  _total_strain[_qp].zero();
48  _deformation_gradient[_qp].zero();
49  _deformation_gradient[_qp].addIa(1.0);
50 
51  // Note that for some models (small strain), the rotation increment is
52  // never updated. Because we always have stateful properties, this method
53  // always gets called, so we can rely on this getting set here without
54  // setting it again when properties get computed.
55  _rotation_increment[_qp].zero();
56  _rotation_increment[_qp].addIa(1.0);
57 }
MaterialProperty< RankTwoTensor > & _deformation_gradient
MaterialProperty< RankTwoTensor > & _mechanical_strain
MaterialProperty< RankTwoTensor > & _rotation_increment
MaterialProperty< RankTwoTensor > & _total_strain
void ComputeIncrementalStrainBase::subtractEigenstrainIncrementFromStrain ( RankTwoTensor &  strain)
protectedinherited

Definition at line 60 of file ComputeIncrementalStrainBase.C.

Referenced by ComputeIncrementalSmallStrain::computeProperties(), ComputeCosseratIncrementalSmallStrain::computeQpProperties(), ComputeFiniteStrain::computeQpStrain(), and ComputeIncrementalStrainBase::~ComputeIncrementalStrainBase().

61 {
62  for (unsigned int i = 0; i < _eigenstrains.size(); ++i)
63  {
64  strain -= (*_eigenstrains[i])[_qp];
65  strain += (*_eigenstrains_old[i])[_qp];
66  }
67 }
std::vector< const MaterialProperty< RankTwoTensor > * > _eigenstrains_old
std::vector< const MaterialProperty< RankTwoTensor > * > _eigenstrains

Member Data Documentation

std::string ComputeStrainBase::_base_name
protectedinherited

Definition at line 33 of file ComputeStrainBase.h.

Referenced by ComputeStrainBase::ComputeStrainBase().

const Real& ComputeStrainBase::_current_elem_volume
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeIncrementalStrainBase::_deformation_gradient
protectedinherited
std::vector<const VariableValue *> ComputeStrainBase::_disp
protectedinherited
const VariableValue& ComputeRSphericalIncrementalStrain::_disp_old_0
protected

the old value of the first component of the displacements vector

Definition at line 31 of file ComputeRSphericalIncrementalStrain.h.

Referenced by computeTotalStrainIncrement().

std::vector<MaterialPropertyName> ComputeStrainBase::_eigenstrain_names
protectedinherited
std::vector<const MaterialProperty<RankTwoTensor> *> ComputeStrainBase::_eigenstrains
protectedinherited
std::vector<const MaterialProperty<RankTwoTensor> *> ComputeIncrementalStrainBase::_eigenstrains_old
protectedinherited
std::vector<const VariableGradient *> ComputeStrainBase::_grad_disp
protectedinherited
std::vector<const VariableGradient *> ComputeIncrementalStrainBase::_grad_disp_old
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeStrainBase::_mechanical_strain
protectedinherited
const MaterialProperty<RankTwoTensor>& ComputeIncrementalStrainBase::_mechanical_strain_old
protectedinherited
unsigned int ComputeStrainBase::_ndisp
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeIncrementalStrainBase::_rotation_increment
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeIncrementalStrainBase::_strain_increment
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeIncrementalStrainBase::_strain_rate
protectedinherited
MaterialProperty<RankTwoTensor>& ComputeStrainBase::_total_strain
protectedinherited
const MaterialProperty<RankTwoTensor>& ComputeIncrementalStrainBase::_total_strain_old
protectedinherited
bool ComputeStrainBase::_volumetric_locking_correction
protectedinherited

The documentation for this class was generated from the following files: