FEUDGHexDomain Class Reference

domain class for uniform-deformation-gradient hex elements (UDG) More...

#include <FEElasticSolidDomain.h>

Inheritance diagram for FEUDGHexDomain:

Public Member Functions
	FEUDGHexDomain (FEMesh *pm, FEMaterial *pmat)
	constructor
FEDomain *	Clone ()
	create a clone of this class
void	Residual (FESolidSolver *psolver, vector< double > &R)
	calculates the residual
void	StiffnessMatrix (FESolidSolver *psolver)
	calculates the global stiffness matrix for this domain
void	UpdateStresses (FEModel &fem)
Protected Member Functions
void	UDGInternalForces (FEM &fem, FESolidElement &el, vector< double > &fe)
	Calculates the internal stress vector for enhanced strain hex elements.
void	UDGHourglassForces (FEM &fem, FESolidElement &el, vector< double > &fe)
	calculates hourglass forces for the UDG element
void	UDGElementStiffness (FEM &fem, FESolidElement &el, matrix &ke)
	calculate element stiffness
void	UDGHourglassStiffness (FEM &fem, FESolidElement &el, matrix &ke)
	hourglass stiffness for UDG hex elements
void	UDGGeometricalStiffness (FEM &fem, FESolidElement &el, matrix &ke)
	geometrical stiffness for UDG hex elements
void	UDGMaterialStiffness (FEM &fem, FESolidElement &el, matrix &ke)
	material stiffness for UDG hex elements
void	AvgCartDerivs (FESolidElement &el, double GX[8], double GY[8], double GZ[8], int state=0)
	Calculates the average Cartesian derivatives.
void	AvgDefGrad (FESolidElement &el, mat3d &F, double GX[8], double GY[8], double GZ[8])
double	HexVolume (FESolidElement &el, int state=0)
	Calculates the exact volume of a hexahedral element.

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Detailed Description

domain class for uniform-deformation-gradient hex elements (UDG)

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Member Function Documentation

void FEUDGHexDomain::AvgDefGrad	(	FESolidElement &	el,
		mat3d &	F,
		double	GX[8],
		double	GY[8],
		double	GZ[8]
	)		[protected]

Calculates the average Cartesian derivatives Note that we assume that the GX, GY and GX contain the averaged Cartesian derivatives

void FEUDGHexDomain::Residual	(	FESolidSolver *	psolver,
		vector< double > &	R
	)		[virtual]

calculates the residual

this element should be a UDG-hex

Reimplemented from FEElasticSolidDomain.

void FEUDGHexDomain::UDGElementStiffness	(	FEM &	fem,
		FESolidElement &	el,
		matrix &	ke
	)		[protected]

calculate element stiffness

This function calculates the element stiffness matrix. It calls the material stiffness function, the geometrical stiffness function and, if necessary, the dilatational stiffness function. Note that these three functions only calculate the upper diagonal matrix due to the symmetry of the element stiffness matrix The last section of this function fills the rest of the element stiffness matrix.

void FEUDGHexDomain::UDGHourglassForces	(	FEM &	fem,
		FESolidElement &	el,
		vector< double > &	fe
	)		[protected]

calculates hourglass forces for the UDG element

calculates the hourglass forces

void FEUDGHexDomain::UDGHourglassStiffness	(	FEM &	fem,
		FESolidElement &	el,
		matrix &	ke
	)		[protected]

hourglass stiffness for UDG hex elements

calculates the hourglass stiffness for UDG hex elements

void FEUDGHexDomain::UDGInternalForces	(	FEM &	fem,
		FESolidElement &	el,
		vector< double > &	fe
	)		[protected]

Calculates the internal stress vector for enhanced strain hex elements.

calculates the internal equivalent nodal forces for enhanced strain solid elements.

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The documentation for this class was generated from the following files:

• FEBio/FEElasticSolidDomain.h
• FEBio/udghex.cpp