artisynth.core.materials

Class ViscoelasticMaterial

java.lang.Object

artisynth.core.materials.MaterialBase

artisynth.core.materials.FemMaterial

artisynth.core.materials.ViscoelasticMaterial

All Implemented Interfaces:

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

public class ViscoelasticMaterial
extends FemMaterial

Field Summary

Fields

Modifier and Type	Field and Description
static FieldPropertyList	myProps

Constructor Summary

Constructors

Constructor and Description
ViscoelasticMaterial()
ViscoelasticMaterial(FemMaterial baseMat, ViscoelasticBehavior behav)

Method Summary

Modifier and Type	Method and Description
void	advanceState(MaterialStateObject state, double t0, double t1)
ViscoelasticMaterial	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.
MaterialStateObject	createStateObject()
boolean	equals(FemMaterial mat)
FieldPropertyList	getAllPropertyInfo() Returns a list giving static information about all properties exported by this object.
FemMaterial	getBaseMaterial()
IncompressibleMaterialBase	getIncompressibleComponent()
ViscoelasticBehavior	getViscoBehavior()
boolean	hasState()
java.lang.String[]	initializePropertyValues(FemMaterial mat) If possible, initializes the baseMaterial property in this ViscoelasticMaterial from another FemMaterial.
boolean	isIncompressible()
void	setBaseMaterial(FemMaterial baseMat)
void	setViscoBehavior(ViscoelasticBehavior veb) Allows setting of viscoelastic behaviour

Methods inherited from class artisynth.core.materials.FemMaterial

cauchyToSecondPKStress, computeDevLeftCauchyGreen, computeDevRightCauchyGreen, computeLeftCauchyGreen, computeRightCauchyGreen, getSubClasses, isCorotated, isInvertible, isLinear, propertyChanged, registerSubclass, secondPKToCauchyStress, writeItems

Methods inherited from class artisynth.core.materials.MaterialBase

getProperty, getPropertyHost, getPropertyInfo, hasProperty, hasSymmetricTangent, isWritable, postscan, scaleDistance, scaleMass, 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

ViscoelasticMaterial

public ViscoelasticMaterial()

ViscoelasticMaterial

public ViscoelasticMaterial(FemMaterial baseMat,
                            ViscoelasticBehavior behav)

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

initializePropertyValues

public java.lang.String[] initializePropertyValues(FemMaterial mat)

If possible, initializes the baseMaterial property in this ViscoelasticMaterial from another FemMaterial.

This method is called via reflection in the CompositePropertyPanel code, to help initialize the ViscoelasticMaterial from any previous material that had been selected. It returns an array of the names of the properties that were set, if any.

setBaseMaterial

public void setBaseMaterial(FemMaterial baseMat)

getBaseMaterial

public FemMaterial getBaseMaterial()

getViscoBehavior

public ViscoelasticBehavior getViscoBehavior()

setViscoBehavior

public void setViscoBehavior(ViscoelasticBehavior veb)

Allows setting of viscoelastic behaviour

Parameters:

veb - visco-elastic behaviour

equals

public boolean equals(FemMaterial mat)

Overrides:

equals in class FemMaterial

clone

public ViscoelasticMaterial 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

hasState

public boolean hasState()

Specified by:

hasState in interface HasMaterialState

Overrides:

hasState in class FemMaterial

createStateObject

public MaterialStateObject createStateObject()

Specified by:

createStateObject in interface HasMaterialState

Overrides:

createStateObject in class FemMaterial

advanceState

public void advanceState(MaterialStateObject state,
                         double t0,
                         double t1)

Specified by:

advanceState in interface HasMaterialState

Overrides:

advanceState in class MaterialBase

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

isIncompressible

public boolean isIncompressible()

Overrides:

isIncompressible in class FemMaterial

getIncompressibleComponent

public IncompressibleMaterialBase getIncompressibleComponent()

Overrides:

getIncompressibleComponent in class FemMaterial