artisynth.core.materials

Class FemMaterial

java.lang.Object

artisynth.core.materials.MaterialBase

artisynth.core.materials.FemMaterial

All Implemented Interfaces:

ScalableUnits, java.lang.Cloneable, CompositeProperty, HasProperties, Clonable, Scannable

Direct Known Subclasses:

IncompressibleMaterial, LinearMaterialBase, NeoHookeanMaterial, NullMaterial, StVenantKirchoffMaterial

public abstract class FemMaterial
extends MaterialBase

Field Summary

Fields

Modifier and Type	Field and Description
static PropertyList	myProps

Constructor Summary

Constructors

Constructor and Description
FemMaterial()

Method Summary

Modifier and Type	Method and Description
FemMaterial	clone() Returns a clone of this composite property.
abstract void	computeStress(SymmetricMatrix3d sigma, SolidDeformation def, Matrix3d Q, FemMaterial baseMat) Computes the strain tensor given the supplied deformation
abstract void	computeTangent(Matrix6d D, SymmetricMatrix3d stress, SolidDeformation def, Matrix3d Q, FemMaterial baseMat) Computes the tangent stiffness matrix
boolean	equals(FemMaterial mat)
boolean	equals(java.lang.Object obj)
PropertyList	getAllPropertyInfo() Returns a list giving static information about all properties exported by this object.
static java.lang.Class<?>[]	getSubClasses()
ViscoelasticBehavior	getViscoBehavior()
boolean	isCorotated() Deformation is computed by first removing a rotation component (either explicit or computed from strain)
boolean	isIncompressible()
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.
boolean	isViscoelastic()
static void	registerSubclass(java.lang.Class<? extends FemMaterial> cls) Allow adding of classes (for use in control panels)
void	setViscoBehavior(ViscoelasticBehavior veb) Allows setting of viscoelastic behaviour

Methods inherited from class artisynth.core.materials.MaterialBase

getProperty, getPropertyHost, getPropertyInfo, hasProperty, hasSymmetricTangent, isWritable, scaleDistance, scaleMass, scan, setPropertyHost, setPropertyInfo, tangentSymmetryChanged, updateMaterial, write

Methods inherited from class java.lang.Object

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

Field Detail

myProps

public static PropertyList myProps

Constructor Detail

FemMaterial

public FemMaterial()

Method Detail

registerSubclass

public static void registerSubclass(java.lang.Class<? extends FemMaterial> cls)

Allow adding of classes (for use in control panels)

Parameters:

cls - class to register

getSubClasses

public static java.lang.Class<?>[] getSubClasses()

getAllPropertyInfo

public PropertyList 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 MaterialBase

Returns:

static information for all exported properties

getViscoBehavior

public ViscoelasticBehavior getViscoBehavior()

setViscoBehavior

public void setViscoBehavior(ViscoelasticBehavior veb)

Allows setting of viscoelastic behaviour

Parameters:

veb - visco-elastic behaviour

computeTangent

public abstract void computeTangent(Matrix6d D,
                                    SymmetricMatrix3d stress,
                                    SolidDeformation def,
                                    Matrix3d Q,
                                    FemMaterial baseMat)

Computes the tangent stiffness matrix

Parameters:

D - tangent stiffness, populated

stress - the current stress tensor

def - deformation information, includes deformation gradient and pressure

Q - coordinate frame specifying directions of anisotropy

baseMat - underlying base material (if any)

computeStress

public abstract void computeStress(SymmetricMatrix3d sigma,
                                   SolidDeformation def,
                                   Matrix3d Q,
                                   FemMaterial baseMat)

Computes the strain tensor given the supplied deformation

Parameters:

sigma - strain tensor, populated

def - deformation information, includes deformation gradient and pressure

Q - coordinate frame specifying directions of anisotropy

baseMat - underlying base material (if any)

isInvertible

public boolean isInvertible()

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

isIncompressible

public boolean isIncompressible()

isViscoelastic

public boolean isViscoelastic()

isLinear

public boolean isLinear()

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

Returns:

true if linear response

isCorotated

public boolean isCorotated()

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

Returns:

true if material is corotated

equals

public boolean equals(FemMaterial mat)

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

clone

public FemMaterial 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 MaterialBase

Returns:

clone of this property