artisynth.core.materials

Class StVenantKirchoffMaterial

java.lang.Object

artisynth.core.materials.MaterialBase

artisynth.core.materials.FemMaterial

artisynth.core.materials.StVenantKirchoffMaterial

All Implemented Interfaces:

HasMaterialState, PostScannable, PropertyChangeListener, ScalableUnits, java.lang.Cloneable, CompositeProperty, HasProperties, Clonable, Scannable

public class StVenantKirchoffMaterial
extends FemMaterial

NOTE: This is a non-standard version of the St. Venant-Kirchoff model, which computes: sigma = 1/J (lambda trace(E)-mu)B+mu/J*B^2, in line with FEBio's recommendation

Field Summary

Fields

Modifier and Type	Field and Description
static FieldPropertyList	myProps

Constructor Summary

Constructors

Constructor and Description
StVenantKirchoffMaterial()
StVenantKirchoffMaterial(double E, double nu)

Method Summary

Modifier and Type	Method and Description
StVenantKirchoffMaterial	clone() Returns a clone of this composite property.
double	computeStrainEnergyDensity(DeformedPoint def, Matrix3d Q, double excitation, MaterialStateObject state) Computes the current strain energy density.
void	computeStressAndTangent(SymmetricMatrix3d sigma, Matrix6d D, DeformedPoint def, Matrix3d Q, double excitation, MaterialStateObject state) Computes the current Cauchy stress and tangent stiffness matrix.
boolean	equals(FemMaterial mat)
FieldPropertyList	getAllPropertyInfo() Returns a list giving static information about all properties exported by this object.
double	getPoissonsRatio()
PropertyMode	getPoissonsRatioMode()
double	getYoungsModulus()
double	getYoungsModulus(FemFieldPoint dp)
ScalarFieldComponent	getYoungsModulusField()
PropertyMode	getYoungsModulusMode()
static void	main(java.lang.String[] args)
void	scaleDistance(double s) Scales all distance coordinates.
void	scaleMass(double s) Scales all mass units.
void	setPoissonsRatio(double nu)
void	setPoissonsRatioMode(PropertyMode mode)
void	setYoungsModulus(double E)
void	setYoungsModulusField(ScalarFieldComponent field)
void	setYoungsModulusMode(PropertyMode mode)

Methods inherited from class artisynth.core.materials.FemMaterial

cauchyToSecondPKStress, computeDevLeftCauchyGreen, computeDevRightCauchyGreen, computeLeftCauchyGreen, computeRightCauchyGreen, createStateObject, getIncompressibleComponent, getSubClasses, hasState, isCorotated, isIncompressible, isInvertible, isLinear, propertyChanged, registerSubclass, secondPKToCauchyStress, writeItems

Methods inherited from class artisynth.core.materials.MaterialBase

advanceState, getProperty, getPropertyHost, getPropertyInfo, hasProperty, hasSymmetricTangent, isWritable, postscan, scan, setPropertyHost, setPropertyInfo, symmetryOrStateChanged, updateMaterial, write

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

myProps

public static FieldPropertyList myProps

Constructor Detail

StVenantKirchoffMaterial

public StVenantKirchoffMaterial()

StVenantKirchoffMaterial

public StVenantKirchoffMaterial(double E,
                                double nu)

Method Detail

getAllPropertyInfo

public FieldPropertyList getAllPropertyInfo()

Description copied from interface: HasProperties

Returns a list giving static information about all properties exported by this object.

Specified by:

getAllPropertyInfo in interface HasProperties

Overrides:

getAllPropertyInfo in class FemMaterial

Returns:

static information for all exported properties

setPoissonsRatio

public void setPoissonsRatio(double nu)

getPoissonsRatio

public double getPoissonsRatio()

setPoissonsRatioMode

public void setPoissonsRatioMode(PropertyMode mode)

getPoissonsRatioMode

public PropertyMode getPoissonsRatioMode()

setYoungsModulus

public void setYoungsModulus(double E)

getYoungsModulus

public double getYoungsModulus()

setYoungsModulusMode

public void setYoungsModulusMode(PropertyMode mode)

getYoungsModulusMode

public PropertyMode getYoungsModulusMode()

getYoungsModulus

public double getYoungsModulus(FemFieldPoint dp)

getYoungsModulusField

public ScalarFieldComponent getYoungsModulusField()

setYoungsModulusField

public void setYoungsModulusField(ScalarFieldComponent field)

computeStressAndTangent

public void computeStressAndTangent(SymmetricMatrix3d sigma,
                                    Matrix6d D,
                                    DeformedPoint def,
                                    Matrix3d Q,
                                    double excitation,
                                    MaterialStateObject state)

Computes the current Cauchy stress and tangent stiffness matrix.

Specified by:

computeStressAndTangent in class FemMaterial

Parameters:

sigma - returns the Cauchy stress

D - optional; if non-null, returns the tangent matrix

def - deformation information, including deformation gradient and pressure

Q - coordinate frame specifying directions of anisotropy

excitation - current excitation value

state - material state information, or null if the material does not have state.

computeStrainEnergyDensity

public double computeStrainEnergyDensity(DeformedPoint def,
                                         Matrix3d Q,
                                         double excitation,
                                         MaterialStateObject state)

Description copied from class: FemMaterial

Computes the current strain energy density.

Specified by:

computeStrainEnergyDensity in class FemMaterial

Parameters:

def - deformation information, including deformation gradient and pressure

Q - coordinate frame specifying directions of anisotropy

excitation - current excitation value

state - material state information, or null if the material does not have state.

Returns:

strain energy density

equals

public boolean equals(FemMaterial mat)

Overrides:

equals in class FemMaterial

clone

public StVenantKirchoffMaterial clone()

Description copied from interface: CompositeProperty

Returns a clone of this composite property.

Specified by:

clone in interface CompositeProperty

Specified by:

clone in interface Clonable

Overrides:

clone in class FemMaterial

Returns:

clone of this property

main

public static void main(java.lang.String[] args)

scaleDistance

public void scaleDistance(double s)

Description copied from interface: ScalableUnits

Scales all distance coordinates.

Specified by:

scaleDistance in interface ScalableUnits

Overrides:

scaleDistance in class MaterialBase

Parameters:

s - scaling factor

scaleMass

public void scaleMass(double s)

Description copied from interface: ScalableUnits

Scales all mass units.

Specified by:

scaleMass in interface ScalableUnits

Overrides:

scaleMass in class MaterialBase

Parameters:

s - scaling factor