artisynth.core.materials

Class LinearMaterialBase

java.lang.Object

artisynth.core.materials.MaterialBase

artisynth.core.materials.FemMaterial

artisynth.core.materials.LinearMaterialBase

All Implemented Interfaces:

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

Direct Known Subclasses:

AnisotropicLinearMaterial, LinearMaterial, TransverseLinearMaterial

public abstract class LinearMaterialBase
extends FemMaterial

Base material for both isotropic and anisotropic linear materials

Author:

Antonio

Field Summary

Fields

Modifier and Type	Field and Description
static FieldPropertyList	myProps

Method Summary

Modifier and Type	Method and Description
LinearMaterialBase	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.
PropertyMode	getCorotatedMode()
boolean	isCorotated() Deformation is computed by first removing a rotation component (either explicit or computed from strain)
boolean	isInvertible() Returns true if this material is defined for a deformation gradient with a non-positive determinant.
boolean	isLinear() Linear stress/stiffness response to deformation, allows tangent to be pre-computed and stored.
void	setCorotated(boolean enable)
void	setCorotatedMode(PropertyMode mode)

Methods inherited from class artisynth.core.materials.FemMaterial

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

Methods inherited from class artisynth.core.materials.MaterialBase

advanceState, 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

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

isInvertible

public boolean isInvertible()

Description copied from class: FemMaterial

Returns true if this material is defined for a deformation gradient with a non-positive determinant.

Overrides:

isInvertible in class FemMaterial

isLinear

public boolean isLinear()

Description copied from class: FemMaterial

Linear stress/stiffness response to deformation, allows tangent to be pre-computed and stored.

Overrides:

isLinear in class FemMaterial

Returns:

true if linear response

setCorotated

public void setCorotated(boolean enable)

isCorotated

public boolean isCorotated()

Description copied from class: FemMaterial

Deformation is computed by first removing a rotation component (either explicit or computed from strain)

Overrides:

isCorotated in class FemMaterial

Returns:

true if material is corotated

setCorotatedMode

public void setCorotatedMode(PropertyMode mode)

getCorotatedMode

public PropertyMode getCorotatedMode()

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 LinearMaterialBase 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