ComputeElasticityBeam Class Reference

#include <ComputeElasticityBeam.h>

Inheritance diagram for ComputeElasticityBeam:

Public Member Functions
	ComputeElasticityBeam (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual void	computeQpProperties () override

Protected Attributes
MaterialProperty< RealVectorValue > &	_material_stiffness
	Material stiffness vector that relates displacement strain increments to force increments. More...
MaterialProperty< RealVectorValue > &	_material_flexure
	Material flexure vector that relates rotational strain increments to moment increments. More...
const Function *const	_prefactor_function
	Prefactor function used to modify (i.e., multiply) the material stiffness and flexure vectors. More...
const VariableValue &	_youngs_modulus
	Young's modulus of the beam material. More...
const VariableValue &	_poissons_ratio
	Poisson's ratio of the beam material. More...
const VariableValue &	_shear_coefficient
	Shear coefficient for the beam cross-section. More...

Detailed Description

Definition at line 24 of file ComputeElasticityBeam.h.

Constructor & Destructor Documentation

ComputeElasticityBeam()

ComputeElasticityBeam::ComputeElasticityBeam

(

const InputParameters &

parameters

)

Definition at line 40 of file ComputeElasticityBeam.C.

  : Material(parameters),
    _material_stiffness(declareProperty<RealVectorValue>("material_stiffness")),
    _material_flexure(declareProperty<RealVectorValue>("material_flexure")),
    _prefactor_function(isParamValid("elasticity_prefactor") ? &getFunction("elasticity_prefactor")
                                                             : nullptr),
    _youngs_modulus(coupledValue("youngs_modulus")),
    _poissons_ratio(coupledValue("poissons_ratio")),
    _shear_coefficient(coupledValue("shear_coefficient"))
{
}

Member Function Documentation

computeQpProperties()

void ComputeElasticityBeam::computeQpProperties ( )

overrideprotectedvirtual

Definition at line 53 of file ComputeElasticityBeam.C.

{
  const Real shear_modulus = _youngs_modulus[_qp] / (2.0 * (1.0 + _poissons_ratio[_qp]));
 
  // material_stiffness relates the translational strains to forces
  _material_stiffness[_qp](0) = _youngs_modulus[_qp];
  _material_stiffness[_qp](1) = _shear_coefficient[_qp] * shear_modulus;
  _material_stiffness[_qp](2) = _material_stiffness[_qp](1);
 
  // material_flexure relates the rotational strains to moments
  _material_flexure[_qp](0) = _shear_coefficient[_qp] * shear_modulus;
  _material_flexure[_qp](1) = _youngs_modulus[_qp];
  _material_flexure[_qp](2) = _material_flexure[_qp](1);
 
  // Multiply by prefactor
  if (_prefactor_function)
  {
    _material_stiffness[_qp] *= _prefactor_function->value(_t, _q_point[_qp]);
    _material_flexure[_qp] *= _prefactor_function->value(_t, _q_point[_qp]);
  }
}

validParams()

InputParameters ComputeElasticityBeam::validParams ( )

static

Definition at line 18 of file ComputeElasticityBeam.C.

{
  InputParameters params = Material::validParams();
  params.addClassDescription("Computes the equivalent of the elasticity tensor for the beam "
                             "element, which are vectors of material translational and flexural "
                             "stiffness.");
  params.addParam<FunctionName>(
      "elasticity_prefactor",
      "Optional function to use as a scalar prefactor on the elasticity vector for the beam.");
  params.addRequiredCoupledVar(
      "youngs_modulus",
      "Young's modulus of the material. Can be supplied as either a number or a variable name.");
  params.addRequiredCoupledVar(
      "poissons_ratio",
      "Poisson's ratio of the material. Can be supplied as either a number or a variable name.");
  params.addCoupledVar(
      "shear_coefficient",
      1.0,
      "Scale factor for the shear modulus. Can be supplied as either a number or a variable name.");
  return params;
}

Member Data Documentation

_material_flexure

MaterialProperty<RealVectorValue>& ComputeElasticityBeam::_material_flexure

protected

Material flexure vector that relates rotational strain increments to moment increments.

Definition at line 38 of file ComputeElasticityBeam.h.

Referenced by computeQpProperties().

_material_stiffness

MaterialProperty<RealVectorValue>& ComputeElasticityBeam::_material_stiffness

protected

Material stiffness vector that relates displacement strain increments to force increments.

Definition at line 35 of file ComputeElasticityBeam.h.

Referenced by computeQpProperties().

_poissons_ratio

const VariableValue& ComputeElasticityBeam::_poissons_ratio

protected

Poisson's ratio of the beam material.

Definition at line 47 of file ComputeElasticityBeam.h.

Referenced by computeQpProperties().

_prefactor_function

const Function* const ComputeElasticityBeam::_prefactor_function

protected

Prefactor function used to modify (i.e., multiply) the material stiffness and flexure vectors.

Definition at line 41 of file ComputeElasticityBeam.h.

Referenced by computeQpProperties().

_shear_coefficient

const VariableValue& ComputeElasticityBeam::_shear_coefficient

protected

Shear coefficient for the beam cross-section.

Definition at line 50 of file ComputeElasticityBeam.h.

Referenced by computeQpProperties().

_youngs_modulus

const VariableValue& ComputeElasticityBeam::_youngs_modulus

protected

Young's modulus of the beam material.

Definition at line 44 of file ComputeElasticityBeam.h.

Referenced by computeQpProperties().

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

• tensor_mechanics/include/materials/ComputeElasticityBeam.h
• tensor_mechanics/src/materials/ComputeElasticityBeam.C