Hexahedral element with 8 Gauss Points. More...

#include <CElement.hpp>

Inheritance diagram for CHEXA8:

Public Member Functions
	CHEXA8 ()
	Constructor of the class.

su2double	ComputeVolume (const FrameType mode=REFERENCE) const override
	Compute the value of the volume of the element.

Public Member Functions inherited from CElementWithKnownSizes< 8, 8, 3 >
void	ComputeGrad_Linear (void) final
	Set the value of the gradient of the shape functions wrt the reference configuration.

void	ComputeGrad_NonLinear (void) final
	Set the value of the gradient of the shape functions wrt the current configuration.

void	ComputeGrad_SurfaceEmbedded () final
	Overload needed for deformed 2D elements on a surface in 3D or 1D elements on a 2D curve.

Public Member Functions inherited from CElement
	CElement (void)=delete
	Default constructor of the class, deleted to make sure derived classes always call the allocating constructor.

	CElement (unsigned short ngauss, unsigned short nnodes, unsigned short ndim)
	Constructor of the class.

virtual	~CElement (void)=default
	Destructor of the class.

void	ClearElement (void)
	Sets matrices to 0.

unsigned short	GetnNodes (void) const
	Retrieve the number of nodes of the element.

unsigned short	GetnGaussPoints (void) const
	Retrieve the number of nodes of the element.

void	SetRef_Coord (unsigned short iNode, unsigned short iDim, const su2double &val_CoordRef)
	Set the value of the coordinate of the nodes in the reference configuration.

void	SetCurr_Coord (unsigned short iNode, unsigned short iDim, const su2double &val_CoordCurr)
	Set the value of the coordinate of the nodes in the current configuration.

void	SetTemperature (unsigned short iNode, const su2double &val_Temperature)
	Set the value of the temperature of a node.

void	SetTemperature (const su2double &val_Temperature)
	Set the value of the temperature of all nodes.

su2double	GetRef_Coord (unsigned short iNode, unsigned short iDim) const
	Get the value of the coordinate of the nodes in the reference configuration.

su2double	GetCurr_Coord (unsigned short iNode, unsigned short iDim) const
	Get the value of the coordinate of the nodes in the current configuration.

su2double	GetTemperature (unsigned short iGauss) const
	Get the value of the temperature at a Gaussian integration point.

su2double	GetWeight (unsigned short iGauss) const
	Get the weight of the corresponding Gaussian Point.

su2double	GetJ_X (unsigned short iGauss) const
	Get the Jacobian respect to the reference configuration for the Gaussian Point iGauss.

su2double	GetJ_x (unsigned short iGauss) const
	Get the jacobian respect to the current configuration for the Gaussian Point iGauss.

su2double	GetElement_Pressure (void) const
	Retrieve the value of the pressure in the element for incompressible materials.

void	Add_Mab (unsigned short nodeA, unsigned short nodeB, const su2double &val_Mab)
	Add the value of the diagonal term for the mass matrix.

template<typename Matrix >
void	Add_Kab (unsigned short nodeA, unsigned short nodeB, Matrix &val_Kab)
	Add the value of a submatrix K relating nodes a and b, for the constitutive term.

template<typename Matrix >
void	Add_Kab_T (unsigned short nodeA, unsigned short nodeB, Matrix &val_Kab)
	Add the value of a submatrix K relating nodes a and b, for the constitutive term (symmetric terms need transpose)

void	Add_Ks_ab (unsigned short nodeA, unsigned short nodeB, const su2double &val_Ks_ab)
	Add the value of the diagonal term for the stress contribution to the stiffness of the system.

void	Add_Kt_a (unsigned short nodeA, const su2double *val_Kt_a)
	Add the value of the nodal stress term for the computation of the residual.

void	Add_FDL_a (unsigned short nodeA, const su2double *val_FDL_a)
	Add the value of the dead load for the computation of the residual.

void	ClearStress (void)
	Restarts the values of stress in the element.

su2double	Get_Mab (unsigned short nodeA, unsigned short nodeB) const
	Return the value of the diagonal term for the mass matrix, relating nodes a and b.

const su2double *	Get_Kab (unsigned short nodeA, unsigned short nodeB) const
	Return the value of the submatrix K relating nodes a and b.

su2double	Get_Ks_ab (unsigned short nodeA, unsigned short nodeB) const
	Return the value of the diagonal term for the stress contribution, relating nodes a and b.

const su2double *	Get_Kt_a (unsigned short nodeA) const
	Return the values of the nodal stress components of the residual for node a.

const su2double *	Get_FDL_a (unsigned short nodeA) const
	Return the values of the dead load components of the residual for node a.

su2double	GetNi (unsigned short iNode, unsigned short iGauss) const
	Retrieve the value of the shape functions.

su2double	GetGradNi_X (unsigned short iNode, unsigned short iGauss, unsigned short iDim) const
	Retrieve the value of the gradient of the shape functions respect to the reference configuration.

su2double	GetGradNi_x (unsigned short iNode, unsigned short iGauss, unsigned short iDim) const
	Retrieve the value of the gradient of the shape functions respect to the current configuration.

su2double	GetNi_Extrap (unsigned short iNode, unsigned short iGauss) const
	Retrieve the value of the gradient of the shape functions respect to the reference configuration.

void	Add_NodalStress (unsigned short iNode, unsigned short iVar, const su2double &val_Stress)
	Add a value to the nodal stress for an element.

su2double	Get_NodalStress (unsigned short iNode, unsigned short iVar) const
	Retrieve the value of the nodal stress for an element.

void	Set_ElProperties (const CProperty *element_property)
	Store the values of the identifiers for element properties.

void	Set_iDe (unsigned long val_iDe)
	Store the value of the identifier for the Dielectric Elastomers.

unsigned long	Get_iDe (void) const
	Return the value of the identifier for the Dielectric Elastomers.

unsigned long	Get_iDV (void) const
	Return the value of the identifier for the Design Variable.

unsigned long	Get_iProp (void) const
	Return the value of the identifier for the Element Property.

virtual su2double	ComputeLength (const FrameType mode=REFERENCE) const
	Compute the value of the length of the element.

virtual su2double	ComputeArea (const FrameType mode=REFERENCE) const
	Compute the value of the area of the element.

su2double	ComputeCurrentArea (void) const
	Compute the value of the area of the element in current coordinates (wrapper to ComputeArea(CURRENT)).

su2double	ComputeCurrentVolume (void) const
	Compute the value of the volume of the element in current coordinates (wrapper to ComputeVolume(CURRENT)).

void	SetPreaccIn_Coords (bool nonlinear=true)
	Register the current and reference coordinates of the element as pre-accumulation inputs the latter are needed for compatibility with shape derivatives, there is no problem registering because inactive variables are ignored.

void	SetPreaccOut_Kt_a (void)
	Register the stress residual as a pre-accumulation output. When computing the element stiffness matrix this is the only term that sees its way into the RHS of the system.

void	SetPreaccOut_Mab (void)
	Register the mass matrix as a pre-accumulation output.

void	SetPreaccOut_FDL_a (void)
	Register the dead load as a pre-accumulation output.

void	Add_HiHj (su2double val, unsigned short nodeA, unsigned short nodeB)
	Add the scalar product of the shape functions to the tangent matrix.

template<class MatrixType >
void	Add_DHiDHj (const MatrixType &val, unsigned short nodeA, unsigned short nodeB)
	Add the scalar product of the gradients of shape functions to the tangent matrix.

template<class MatrixType >
void	Add_DHiDHj_T (const MatrixType &val, unsigned short nodeA, unsigned short nodeB)
	Add the transposed scalar product of the gradients of shape functions to the tangent matrix.

su2double	Get_HiHj (unsigned short nodeA, unsigned short nodeB)
	Get the scalar product of the shape functions to the tangent matrix.

su2activematrix &	Get_DHiDHj (unsigned short nodeA, unsigned short nodeB)
	Get the scalar product of the gradients of shape functions to the tangent matrix.

Additional Inherited Members
Public Types inherited from CElement
enum	FrameType { REFERENCE = 1 , CURRENT = 2 }

Protected Types inherited from CElement
enum	: size_t { MAXNDIM = 3 }

Protected Member Functions inherited from CElementWithKnownSizes< 8, 8, 3 >
	CElementWithKnownSizes ()
	Constructor of the class.

void	ComputeGrad_impl (void)
	Implementation of gradient computation leveraging the static sizes.

void	ComputeGrad_impl_surf_embedded ()

Protected Attributes inherited from CElementWithKnownSizes< 8, 8, 3 >
su2double	GaussCoord [NGAUSS][NDIM]
	Coordinates of the integration points.

su2double	dNiXj [NGAUSS][NNODE][NDIM]
	Shape function derivatives evaluated at the Gauss points.

Protected Attributes inherited from CElement
std::vector< CGaussVariable >	GaussPoint
	Vector of Gaussian Points.

su2activematrix	CurrentCoord
	Coordinates in the current frame.

su2activematrix	RefCoord
	Coordinates in the reference frame.

su2activevector	GaussWeight
	Weight of the Gaussian Points for the integration.

su2activematrix	NodalExtrap
	Coordinates of the nodal points for Gaussian extrapolation.

su2activematrix	NodalStress
	Stress at the nodes.

su2activevector	NodalTemperature
	Temperature at the nodes.

std::vector< su2activematrix >	Kab
	Structure for the constitutive component of the tangent matrix.

su2activematrix	Mab
	Structure for the nodal components of the mass matrix.

su2activematrix	Ks_ab
	Structure for the stress component of the tangent matrix.

su2activematrix	Kt_a
	Matrix of nodal stress terms for residual computation.

su2activematrix	FDL_a
	Matrix of dead loads for residual computation.

su2double	el_Pressure = 0.0
	Pressure in the element.

unsigned long	iProp = 0
	ID of the Element Property.

unsigned long	iDV = 0
	ID of the Design Variable (if it is element based).

unsigned long	iDe = 0
	ID of the dielectric elastomer.

unsigned short	nGaussPoints
	Number of gaussian points.

unsigned short	nNodes
	Number of geometric points.

unsigned short	nDim
	Number of dimension of the problem.

su2activematrix	HiHj = 0.0
	Scalar product of 2 ansatz functions.

std::vector< std::vector< su2activematrix > >	DHiDHj
	Scalar product of the gradients of 2 ansatz functions.

Detailed Description

Hexahedral element with 8 Gauss Points.

Author: R. Sanchez

Constructor & Destructor Documentation

◆ CHEXA8()

CHEXA8::CHEXA8 ( )

Constructor of the class.

Member Function Documentation

◆ ComputeVolume()

su2double CHEXA8::ComputeVolume ( const FrameType mode = REFERENCE ) const

overridevirtual

Compute the value of the volume of the element.

Parameters

[in] mode - Type of coordinates to consider in the computation.

Returns: Volume of the element.

Reimplemented from CElement.

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

Common/include/geometry/elements/CElement.hpp
Common/src/geometry/elements/CHEXA8.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ CHEXA8()

Member Function Documentation

◆ ComputeVolume()