artisynth.core.materials

Class IncompressibleMaterialBase

java.lang.Object

artisynth.core.materials.MaterialBase

artisynth.core.materials.FemMaterial

artisynth.core.materials.IncompressibleMaterialBase

All Implemented Interfaces:

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

Direct Known Subclasses:

ArrudaBoyceMaterial, CubicHyperelastic, FungMaterial, FungOrthotropicMaterial, IncompNeoHookeanMaterial, IncompressibleMaterial, MooneyRivlinMaterial, OgdenMaterial, VerondaWestmannMaterial, YeohMaterial

public abstract class IncompressibleMaterialBase
extends FemMaterial

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IncompressibleMaterialBase.BulkPotential

Field Summary

Fields

Modifier and Type	Field and Description
static double	DEFAULT_BULK_MODULUS
static IncompressibleMaterialBase.BulkPotential	DEFAULT_BULK_POTENTIAL
static FieldPropertyList	myProps

Constructor Summary

Constructors

Constructor and Description
IncompressibleMaterialBase()

Method Summary

Modifier and Type	Method and Description
void	addPressureStress(SymmetricMatrix3d sigma, double p)
void	addPressureTangent(Matrix6d D, double p)
abstract double	computeDevStrainEnergy(DeformedPoint def, Matrix3d Q, double excitation, MaterialStateObject state)
abstract void	computeDevStressAndTangent(SymmetricMatrix3d sigma, Matrix6d D, DeformedPoint def, Matrix3d Q, double excitation, MaterialStateObject state)
void	computePressureStress(SymmetricMatrix3d sigma, double p)
void	computePressureTangent(Matrix6d D, double p)
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.
double	computeU(double K, double J) Computes the dilational strain energy density U given a bulk modulus K and Jacobian determinant J.
boolean	equals(FemMaterial mat)
FieldPropertyList	getAllPropertyInfo() Returns a list giving static information about all properties exported by this object.
double	getBulkModulus()
double	getBulkModulus(FemFieldPoint dp)
ScalarFieldComponent	getBulkModulusField()
PropertyMode	getBulkModulusMode()
IncompressibleMaterialBase.BulkPotential	getBulkPotential()
PropertyMode	getBulkPotentialMode()
double	getEffectiveModulus(double K, double J) Returns the effective bulk modulus for a given nominal (linear) bulk modulus K and Jacobian determinant J.
double	getEffectivePressure(double K, double J) Returns the effective pressure for a given nominal (linear) bulk modulus K and Jacobian determinant J.
IncompressibleMaterialBase	getIncompressibleComponent()
boolean	isIncompressible()
void	scaleDistance(double s) Scales all distance coordinates.
void	scaleMass(double s) Scales all mass units.
void	setBulkModulus(double nu)
void	setBulkModulusField(ScalarFieldComponent func)
void	setBulkModulusMode(PropertyMode mode)
void	setBulkPotential(IncompressibleMaterialBase.BulkPotential potential)
void	setBulkPotentialMode(PropertyMode mode)

Methods inherited from class artisynth.core.materials.FemMaterial

cauchyToSecondPKStress, clone, computeDevLeftCauchyGreen, computeDevRightCauchyGreen, computeLeftCauchyGreen, computeRightCauchyGreen, createStateObject, getSubClasses, hasState, isCorotated, 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

DEFAULT_BULK_MODULUS

public static final double DEFAULT_BULK_MODULUS

See Also:

Constant Field Values

DEFAULT_BULK_POTENTIAL

public static final IncompressibleMaterialBase.BulkPotential DEFAULT_BULK_POTENTIAL

myProps

public static FieldPropertyList myProps

Constructor Detail

IncompressibleMaterialBase

public IncompressibleMaterialBase()

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

setBulkModulus

public void setBulkModulus(double nu)

getBulkModulus

public double getBulkModulus()

setBulkModulusMode

public void setBulkModulusMode(PropertyMode mode)

getBulkModulusMode

public PropertyMode getBulkModulusMode()

getBulkModulus

public double getBulkModulus(FemFieldPoint dp)

getBulkModulusField

public ScalarFieldComponent getBulkModulusField()

setBulkModulusField

public void setBulkModulusField(ScalarFieldComponent func)

setBulkPotential

public void setBulkPotential(IncompressibleMaterialBase.BulkPotential potential)

getBulkPotential

public IncompressibleMaterialBase.BulkPotential getBulkPotential()

setBulkPotentialMode

public void setBulkPotentialMode(PropertyMode mode)

getBulkPotentialMode

public PropertyMode getBulkPotentialMode()

getEffectiveModulus

public double getEffectiveModulus(double K,
                                  double J)

Returns the effective bulk modulus for a given nominal (linear) bulk modulus K and Jacobian determinant J. The effective and linear modulus will differ in cases when the potential function is non-quadratic.

Parameters:

K - nominal (linear) bulk modulus

J - Jacobian determinant

Returns:

effective bulk modulus

getEffectivePressure

public double getEffectivePressure(double K,
                                   double J)

Returns the effective pressure for a given nominal (linear) bulk modulus K and Jacobian determinant J.

Parameters:

K - nominal (linear) bulk modulus

J - Jacobian determinant

Returns:

effective pressure

computeU

public double computeU(double K,
                       double J)

Computes the dilational strain energy density U given a bulk modulus K and Jacobian determinant J.

Parameters:

K - bulk modulus

J - Jacobian determinant

Returns:

dilational strain energy

isIncompressible

public boolean isIncompressible()

Overrides:

isIncompressible in class FemMaterial

getIncompressibleComponent

public IncompressibleMaterialBase getIncompressibleComponent()

Overrides:

getIncompressibleComponent in class FemMaterial

equals

public boolean equals(FemMaterial mat)

Overrides:

equals in class FemMaterial

computePressureStress

public void computePressureStress(SymmetricMatrix3d sigma,
                                  double p)

addPressureStress

public void addPressureStress(SymmetricMatrix3d sigma,
                              double p)

computePressureTangent

public void computePressureTangent(Matrix6d D,
                                   double p)

addPressureTangent

public void addPressureTangent(Matrix6d D,
                               double p)

computeDevStressAndTangent

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

computeDevStrainEnergy

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

computeStressAndTangent

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

Description copied from class: FemMaterial

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

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