Steel1DFiber Class Reference

Class for creating an uniaxial steel (Menegotto and Pinto 1973) material compatible with fiber section. More...

#include <Steel1DFiber.hpp>

Inheritance diagram for Steel1DFiber:

Collaboration diagram for Steel1DFiber:

Public Member Functions
	Steel1DFiber (double fy, double E, double b, double R0=15.00, double cR1=0.925, double cR2=0.150, double a1=0.0, double a2=1.0, double a3=0.0, double a4=1.0, double nu=0.33, double rho=0.0)
	Creates a Steel1DFiber material to be specified at a Gauss-point in an Element. More...
	~Steel1DFiber ()
	Destroys this Steel1DFiber material. More...
std::unique_ptr< Material >	CopyMaterial ()
double	GetDensity () const
	Access material density. More...
double	GetPoissonRatio () const
	Returns the Poisson's ratio. More...
double	GetBulkModulus () const
	Access bulk modulus. More...
double	GetShearModulus () const
	Returns linear shear modulus. More...
double	GetElasticityModulus () const
	Access modulus of elasticity. More...
double	GetEnergy () const
	Access the material's energy at current strain. More...
Eigen::MatrixXd	GetDamping () const
	Returns the material viscous damping. More...
Eigen::VectorXd	GetStrain () const
	Returns the material strain. More...
Eigen::VectorXd	GetStress () const
	Returns the material stress. More...
Eigen::VectorXd	GetStrainRate () const
	Returns the material strain rate. More...
Eigen::VectorXd	GetTotalStress () const
	Computes the material total stress. More...
Eigen::MatrixXd	GetTangentStiffness () const
	Returns the material stiffness. More...
Eigen::MatrixXd	GetInitialTangentStiffness () const
	Returns the initial material stiffness. More...
void	CommitState ()
	Perform converged material state update. More...
void	ReverseState ()
	Reverse the material states to previous converged state. More...
void	InitialState ()
	Brings the material states to its initial state in the element. More...
void	UpdateState (const Eigen::VectorXd strain, const unsigned int cond=0)
	Update the material state for this iteration. More...
Public Member Functions inherited from Material
	Material (std::string name, bool model)
	Creates a Material to be specified at a Gauss-point in an Element. More...
virtual	~Material ()=0
	Destroys this Material object. More...
std::string	GetName ()
	Gets material information. More...
bool	IsViscous ()
	Gets material stress model. More...

Private Attributes
double	nu
double	fy
double	E
double	b
double	R0
double	cR1
double	cR2
double	a1
double	a2
double	a3
double	a4
double	Rho
double	newStrain
double	newStress
double	newTangentStiffness
double	newMinStrain
double	newMaxStrain
double	newPlasticStrain
double	newStrainInterception
double	newStressInterception
double	newStrainLastInversion
double	newStressLastInversion
int	newLoadUnloadIndex
double	oldStrain
double	oldStress
double	oldTangentStiffness
double	oldMinStrain
double	oldMaxStrain
double	oldPlasticStrain
double	oldStrainInterception
double	oldStressInterception
double	oldStrainLastInversion
double	oldStressLastInversion
int	oldLoadUnloadIndex

Detailed Description

Class for creating an uniaxial steel (Menegotto and Pinto 1973) material compatible with fiber section.

See also

Material.hpp

Constructor & Destructor Documentation

Steel1DFiber()

Steel1DFiber::Steel1DFiber	(	double	fy,
		double	E,
		double	b,
		double	R0 = 15.00,
		double	cR1 = 0.925,
		double	cR2 = 0.150,
		double	a1 = 0.0,
		double	a2 = 1.0,
		double	a3 = 0.0,
		double	a4 = 1.0,
		double	nu = 0.33,
		double	rho = 0.0
	)

Creates a Steel1DFiber material to be specified at a Gauss-point in an Element.

Parameters

fy	Represents the steel yield strength.
E	Represents the elasticity modulus.
b	Represents the strain-hardening ratio.
R0	Represents the parameters to control the transition from elastic to plastic branches.
cR1	Represents the parameters to control the transition from elastic to plastic branches.
cR2	Represents the parameters to control the transition from elastic to plastic branches.
a1	Represents the isotropic hardening parameter.
a2	Represents the isotropic hardening parameter.
a3	Represents the isotropic hardening parameter.
a4	Represents the isotropic hardening parameter.
nu	Represents the Poisson's ratio.
rho	Represents the material density.

See also

Steel1DFiber::E, Steel1DFiber::fy, Steel1DFiber::nu, Steel1DFiber::Rho.

~Steel1DFiber()

Steel1DFiber::~Steel1DFiber

(

)

Destroys this Steel1DFiber material.

Member Function Documentation

CommitState()

void Steel1DFiber::CommitState ( )

virtual

Perform converged material state update.

Note

This function sets the trail stress and strain as converged.

Implements Material.

CopyMaterial()

std::unique_ptr<Material> Steel1DFiber::CopyMaterial ( )

virtual

Returns

A Material pointer to the Steel1DFiber derived class.

See also

Material, Steel1DFiber.

Implements Material.

GetBulkModulus()

double Steel1DFiber::GetBulkModulus ( ) const

virtual

Access bulk modulus.

Returns

The material bulk's (K) modulus.

Implements Material.

GetDamping()

Eigen::MatrixXd Steel1DFiber::GetDamping ( ) const

virtual

Returns the material viscous damping.

Returns

Vector with the material damping components.

Implements Material.

GetDensity()

double Steel1DFiber::GetDensity ( ) const

virtual

Access material density.

Returns

The material density value.

See also

Steel1DFiber::Rho.

Implements Material.

GetElasticityModulus()

double Steel1DFiber::GetElasticityModulus ( ) const

virtual

Access modulus of elasticity.

Returns

The material Elasticity's (E) modulus.

See also

Steel1DFiber::E.

Implements Material.

GetEnergy()

double Steel1DFiber::GetEnergy ( ) const

virtual

Access the material's energy at current strain.

Returns

Scalar with the material energy value.

Implements Material.

GetInitialTangentStiffness()

Eigen::MatrixXd Steel1DFiber::GetInitialTangentStiffness ( ) const

virtual

Returns the initial material stiffness.

Returns

Matrix with the initial material tangent stiffness matrix.

Note

The initial tangent stiffness matrix is computed when the strain vector is zero.

Implements Material.

GetPoissonRatio()

double Steel1DFiber::GetPoissonRatio ( ) const

virtual

Returns the Poisson's ratio.

Returns

The material poisson's ratio.

See also

Elastic1DFiber::nu.

Implements Material.

GetShearModulus()

double Steel1DFiber::GetShearModulus ( ) const

virtual

Returns linear shear modulus.

Returns

The material density value.

Implements Material.

GetStrain()

Eigen::VectorXd Steel1DFiber::GetStrain ( ) const

virtual

Returns the material strain.

Returns

Vector with the material strain components.

Note

The strain can be revisited in Steel1DFiber.

See also

Steel1DFiber::oldStrain.

Implements Material.

GetStrainRate()

Eigen::VectorXd Steel1DFiber::GetStrainRate ( ) const

virtual

Returns the material strain rate.

Returns

Vector with the material strain-rate components.

Note

The stress-rate can be revisited in Steel1DFiber.

Implements Material.

GetStress()

Eigen::VectorXd Steel1DFiber::GetStress ( ) const

virtual

Returns the material stress.

Returns

Vector with the material stress components.

Note

The stress can be revisited in Steel1DFiber.

See also

Steel1DFiber::oldStress.

Implements Material.

GetTangentStiffness()

Eigen::MatrixXd Steel1DFiber::GetTangentStiffness ( ) const

virtual

Returns the material stiffness.

Returns

Matrix with the material tangent stiffness matrix.

Note

The stiffness matrix can be revisited in Steel1DFiber.

See also

Steel1DFiber::oldTangentStiffness.

Implements Material.

GetTotalStress()

Eigen::VectorXd Steel1DFiber::GetTotalStress ( ) const

virtual

Computes the material total stress.

Returns

Vector with the material total stress components.

Note

The damping can be revisited in Steel1DFiber.

See also

Steel1DFiber::oldStress.

Implements Material.

InitialState()

void Steel1DFiber::InitialState ( )

virtual

Brings the material states to its initial state in the element.

Note

This function returns the material states to the beginning.

Implements Material.

ReverseState()

void Steel1DFiber::ReverseState ( )

virtual

Reverse the material states to previous converged state.

Note

This function returns the material states to previous converged states.

Implements Material.

UpdateState()

void Steel1DFiber::UpdateState ( const Eigen::VectorXd  strain, const unsigned int  cond = 0  )

virtual

Update the material state for this iteration.

Parameters

strain	Vector with the strain components at this Gauss-point.
cond	If the the elastic/plastic material components will be updated.

Note

This function computes the strain and tanget stiffness matrix once the trial strain converged.

Implements Material.

Member Data Documentation

a1

double Steel1DFiber::a1

private

a2

double Steel1DFiber::a2

private

a3

double Steel1DFiber::a3

private

a4

double Steel1DFiber::a4

private

b

double Steel1DFiber::b

private

cR1

double Steel1DFiber::cR1

private

cR2

double Steel1DFiber::cR2

private

E

double Steel1DFiber::E

private

fy

double Steel1DFiber::fy

private

newLoadUnloadIndex

int Steel1DFiber::newLoadUnloadIndex

private

newMaxStrain

double Steel1DFiber::newMaxStrain

private

newMinStrain

double Steel1DFiber::newMinStrain

private

newPlasticStrain

double Steel1DFiber::newPlasticStrain

private

newStrain

double Steel1DFiber::newStrain

private

newStrainInterception

double Steel1DFiber::newStrainInterception

private

newStrainLastInversion

double Steel1DFiber::newStrainLastInversion

private

newStress

double Steel1DFiber::newStress

private

newStressInterception

double Steel1DFiber::newStressInterception

private

newStressLastInversion

double Steel1DFiber::newStressLastInversion

private

newTangentStiffness

double Steel1DFiber::newTangentStiffness

private

nu

double Steel1DFiber::nu

private

oldLoadUnloadIndex

int Steel1DFiber::oldLoadUnloadIndex

private

oldMaxStrain

double Steel1DFiber::oldMaxStrain

private

oldMinStrain

double Steel1DFiber::oldMinStrain

private

oldPlasticStrain

double Steel1DFiber::oldPlasticStrain

private

oldStrain

double Steel1DFiber::oldStrain

private

oldStrainInterception

double Steel1DFiber::oldStrainInterception

private

oldStrainLastInversion

double Steel1DFiber::oldStrainLastInversion

private

oldStress

double Steel1DFiber::oldStress

private

oldStressInterception

double Steel1DFiber::oldStressInterception

private

oldStressLastInversion

double Steel1DFiber::oldStressLastInversion

private

oldTangentStiffness

double Steel1DFiber::oldTangentStiffness

private

R0

double Steel1DFiber::R0

private

Rho

double Steel1DFiber::Rho

private