MechanicsBasePD Class Reference

Base kernel class for peridynamic solid mechanics models. More...

#include <MechanicsBasePD.h>

Inheritance diagram for MechanicsBasePD:

Public Member Functions
	MechanicsBasePD (const InputParameters &parameters)
virtual void	computeOffDiagJacobian (MooseVariableFEBase &jvar) override
virtual void	computeLocalOffDiagJacobian (unsigned int)
	Function to compute local contribution to the off-diagonal Jacobian at the current nodes. More...
virtual void	computePDNonlocalOffDiagJacobian (unsigned int, unsigned int)
	Function to compute nonlocal contribution to the off-diagonal Jacobian at the current nodes. More...
virtual void	initialSetup () override
virtual void	prepare () override

Protected Attributes
std::vector< MooseVariable * >	_disp_var
	displacement variables More...
unsigned int	_ndisp
	number of displacement components More...
const std::vector< RealGradient > *	_orientation
	Vector of bond in current configuration. More...
std::vector< dof_id_type >	_ivardofs_ij
	Current variable dof numbers for nodes i and j. More...
RealGradient	_cur_ori_ij
	Vector of bond in current configuration. More...
Real	_cur_len_ij
	Current bond length. More...
const bool	_temp_coupled
	Temperature variable. More...
MooseVariable *	_temp_var
const bool	_out_of_plane_strain_coupled
	Parameters for out-of-plane strain in weak plane stress formulation. More...
MooseVariable *	_out_of_plane_strain_var

Detailed Description

Base kernel class for peridynamic solid mechanics models.

Definition at line 23 of file MechanicsBasePD.h.

Constructor & Destructor Documentation

MechanicsBasePD()

MechanicsBasePD::MechanicsBasePD

(

const InputParameters &

parameters

)

Definition at line 29 of file MechanicsBasePD.C.

  : DerivativeMaterialInterface<PeridynamicsKernelBase>(parameters),
    _temp_coupled(isCoupled("temperature")),
    _temp_var(_temp_coupled ? getVar("temperature", 0) : nullptr),
    _ndisp(coupledComponents("displacements")),
    _out_of_plane_strain_coupled(isCoupled("out_of_plane_strain")),
    _out_of_plane_strain_var(_out_of_plane_strain_coupled ? getVar("out_of_plane_strain", 0)
                                                          : nullptr),
    _orientation(nullptr)
{
  if (_ndisp != _dim)
    mooseError("Number of displacements should be consistent with mesh dimension!");
 
  for (unsigned int i = 0; i < _ndisp; ++i)
    _disp_var.push_back(getVar("displacements", i));
}

Member Function Documentation

computeLocalOffDiagJacobian()

virtual void MechanicsBasePD::computeLocalOffDiagJacobian ( unsigned int  )

inlinevirtual

Function to compute local contribution to the off-diagonal Jacobian at the current nodes.

Parameters

coupled_component

The coupled variable number

Reimplemented in MechanicsBPD, MechanicsOSPD, FiniteStrainMechanicsNOSPD, ForceStabilizedSmallStrainMechanicsNOSPD, SmallStrainMechanicsNOSPD, and WeakPlaneStressNOSPD.

Definition at line 35 of file MechanicsBasePD.h.

{};

Referenced by computeOffDiagJacobian().

computeOffDiagJacobian()

void MechanicsBasePD::computeOffDiagJacobian ( MooseVariableFEBase &  jvar )

overridevirtual

Definition at line 71 of file MechanicsBasePD.C.

{
  prepare();
 
  if (jvar.number() == _var.number())
    computeJacobian();
  else
  {
    unsigned int coupled_component = 0;
    bool active = false;
 
    for (unsigned int i = 0; i < _dim; ++i)
      if (jvar.number() == _disp_var[i]->number())
      {
        coupled_component = i;
        active = true;
      }
 
    if (_temp_coupled && jvar.number() == _temp_var->number())
    {
      coupled_component = 3;
      active = true;
    }
 
    if (_out_of_plane_strain_coupled && jvar.number() == _out_of_plane_strain_var->number())
    {
      coupled_component = 4;
      active = true;
    }
 
    if (active)
    {
      DenseMatrix<Number> & ke = _assembly.jacobianBlock(_var.number(), jvar.number());
      _local_ke.resize(ke.m(), ke.n());
      _local_ke.zero();
 
      computeLocalOffDiagJacobian(coupled_component);
 
      ke += _local_ke;
 
      if (_use_full_jacobian)
        computePDNonlocalOffDiagJacobian(jvar.number(), coupled_component);
    }
  }
}

computePDNonlocalOffDiagJacobian()

virtual void MechanicsBasePD::computePDNonlocalOffDiagJacobian ( unsigned int  , unsigned int    )

inlinevirtual

Function to compute nonlocal contribution to the off-diagonal Jacobian at the current nodes.

Parameters

jvar_num	The number of the first coupled variable
coupled_component	The component number of the second coupled variable

Reimplemented in MechanicsOSPD, FiniteStrainMechanicsNOSPD, ForceStabilizedSmallStrainMechanicsNOSPD, SmallStrainMechanicsNOSPD, and WeakPlaneStressNOSPD.

Definition at line 42 of file MechanicsBasePD.h.

                                                               {};

Referenced by computeOffDiagJacobian().

initialSetup()

void MechanicsBasePD::initialSetup ( )

overridevirtual

Definition at line 47 of file MechanicsBasePD.C.

{
  _orientation = &_assembly.getFE(FEType(), 1)->get_dxyzdxi();
}

prepare()

void MechanicsBasePD::prepare ( )

overridevirtual

Definition at line 53 of file MechanicsBasePD.C.

{
  PeridynamicsKernelBase::prepare();
 
  _ivardofs_ij.resize(_nnodes);
 
  for (unsigned int i = 0; i < _nnodes; ++i)
    _ivardofs_ij[i] = _current_elem->node_ptr(i)->dof_number(_sys.number(), _var.number(), 0);
 
  for (unsigned int i = 0; i < _dim; ++i)
    _cur_ori_ij(i) = _origin_vec_ij(i) + _disp_var[i]->getNodalValue(*_current_elem->node_ptr(1)) -
                     _disp_var[i]->getNodalValue(*_current_elem->node_ptr(0));
 
  _cur_len_ij = _cur_ori_ij.norm();
  _cur_ori_ij /= _cur_len_ij;
}

Referenced by computeOffDiagJacobian(), GeneralizedPlaneStrainOffDiagOSPD::computeOffDiagJacobianScalar(), and GeneralizedPlaneStrainOffDiagNOSPD::computeOffDiagJacobianScalar().

Member Data Documentation

_cur_len_ij

Real MechanicsBasePD::_cur_len_ij

protected

Current bond length.

Definition at line 75 of file MechanicsBasePD.h.

Referenced by MechanicsBPD::computeLocalJacobian(), MechanicsOSPD::computeLocalJacobian(), MechanicsBPD::computeLocalOffDiagJacobian(), MechanicsOSPD::computeLocalOffDiagJacobian(), and prepare().

_cur_ori_ij

RealGradient MechanicsBasePD::_cur_ori_ij

protected

Vector of bond in current configuration.

Definition at line 72 of file MechanicsBasePD.h.

Referenced by GeneralizedPlaneStrainOffDiagOSPD::computeDispFullOffDiagJacobianScalar(), GeneralizedPlaneStrainOffDiagOSPD::computeDispPartialOffDiagJacobianScalar(), MechanicsBPD::computeLocalJacobian(), MechanicsOSPD::computeLocalJacobian(), MechanicsBPD::computeLocalOffDiagJacobian(), MechanicsOSPD::computeLocalOffDiagJacobian(), MechanicsOSPD::computeLocalResidual(), MechanicsBPD::computeLocalResidual(), MechanicsOSPD::computeNonlocalJacobian(), MechanicsOSPD::computePDNonlocalOffDiagJacobian(), and prepare().

_disp_var

std::vector<MooseVariable *> MechanicsBasePD::_disp_var

protected

displacement variables

Definition at line 50 of file MechanicsBasePD.h.

Referenced by GeneralizedPlaneStrainOffDiagOSPD::computeDispFullOffDiagJacobianScalar(), ForceStabilizedSmallStrainMechanicsNOSPD::computeLocalResidual(), MechanicsOSPD::computeNonlocalJacobian(), MechanicsOSPD::computeNonlocalResidual(), computeOffDiagJacobian(), GeneralizedPlaneStrainOffDiagOSPD::computeOffDiagJacobianScalar(), GeneralizedPlaneStrainOffDiagNOSPD::computeOffDiagJacobianScalar(), MechanicsOSPD::computePDNonlocalOffDiagJacobian(), GeneralizedPlaneStrainOffDiagNOSPD::GeneralizedPlaneStrainOffDiagNOSPD(), GeneralizedPlaneStrainOffDiagOSPD::GeneralizedPlaneStrainOffDiagOSPD(), MechanicsBasePD(), and prepare().

_ivardofs_ij

std::vector<dof_id_type> MechanicsBasePD::_ivardofs_ij

protected

Current variable dof numbers for nodes i and j.

Definition at line 69 of file MechanicsBasePD.h.

Referenced by GeneralizedPlaneStrainOffDiagOSPD::computeDispFullOffDiagJacobianScalar(), FiniteStrainMechanicsNOSPD::computeNonlocalJacobian(), ForceStabilizedSmallStrainMechanicsNOSPD::computeNonlocalJacobian(), SmallStrainMechanicsNOSPD::computeNonlocalJacobian(), MechanicsOSPD::computeNonlocalJacobian(), MechanicsOSPD::computeNonlocalResidual(), WeakPlaneStressNOSPD::computePDNonlocalOffDiagJacobian(), ForceStabilizedSmallStrainMechanicsNOSPD::computePDNonlocalOffDiagJacobian(), SmallStrainMechanicsNOSPD::computePDNonlocalOffDiagJacobian(), FiniteStrainMechanicsNOSPD::computePDNonlocalOffDiagJacobian(), MechanicsOSPD::computePDNonlocalOffDiagJacobian(), and prepare().

_ndisp

unsigned int MechanicsBasePD::_ndisp

protected

number of displacement components

Definition at line 58 of file MechanicsBasePD.h.

Referenced by MechanicsBasePD().

_orientation

const std::vector<RealGradient>* MechanicsBasePD::_orientation

protected

Vector of bond in current configuration.

Definition at line 66 of file MechanicsBasePD.h.

Referenced by initialSetup().

_out_of_plane_strain_coupled

const bool MechanicsBasePD::_out_of_plane_strain_coupled

protected

Parameters for out-of-plane strain in weak plane stress formulation.

Definition at line 61 of file MechanicsBasePD.h.

Referenced by computeOffDiagJacobian().

_out_of_plane_strain_var

MooseVariable* MechanicsBasePD::_out_of_plane_strain_var

protected

Definition at line 62 of file MechanicsBasePD.h.

Referenced by computeOffDiagJacobian().

_temp_coupled

const bool MechanicsBasePD::_temp_coupled

protected

Temperature variable.

Definition at line 53 of file MechanicsBasePD.h.

Referenced by computeOffDiagJacobian(), GeneralizedPlaneStrainOffDiagOSPD::computeOffDiagJacobianScalar(), GeneralizedPlaneStrainOffDiagNOSPD::computeOffDiagJacobianScalar(), and MechanicsBaseNOSPD::MechanicsBaseNOSPD().

_temp_var

MooseVariable* MechanicsBasePD::_temp_var

protected

Definition at line 54 of file MechanicsBasePD.h.

Referenced by computeOffDiagJacobian(), GeneralizedPlaneStrainOffDiagOSPD::computeOffDiagJacobianScalar(), GeneralizedPlaneStrainOffDiagNOSPD::computeOffDiagJacobianScalar(), and MechanicsBaseNOSPD::MechanicsBaseNOSPD().

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

• peridynamics/include/kernels/MechanicsBasePD.h
• peridynamics/src/kernels/MechanicsBasePD.C