Abstract base class for "structural" finite elements with geometrical nonlinearities. More...

#include <nlstructuralelement.h>

Inheritance diagram for oofem::NLStructuralElement:

Collaboration diagram for oofem::NLStructuralElement:

Public Member Functions
	NLStructuralElement (int n, Domain *d)
	Constructor. More...

virtual	~NLStructuralElement ()
	Destructor. More...

int	giveGeometryMode ()
	Returns the geometry mode describing the formulation used in the internal work 0 - Engineering (small deformation) stress-strain mode 1 - First Piola-Kirchhoff - Deformation gradient mode, P is defined as FS 2 - Second Piola-Kirchhoff - Green-Lagrange strain mode with deformation gradient as input (deprecated and not supported) More...

void	computeFirstPKStressVector (FloatArray &answer, GaussPoint gp, TimeStep tStep)
	Computes the first Piola-Kirchhoff stress tensor on Voigt format. More...

void	computeCauchyStressVector (FloatArray &answer, GaussPoint gp, TimeStep tStep)
	Computes the Cauchy stress tensor on Voigt format. More...

virtual void	computeStiffnessMatrix (FloatMatrix &answer, MatResponseMode rMode, TimeStep *tStep)
	Computes the stiffness matrix of receiver. More...

virtual void	computeInitialStressMatrix (FloatMatrix &answer, TimeStep *tStep)
	Computes the initial stiffness matrix of receiver. More...

void	computeStiffnessMatrix_withIRulesAsSubcells (FloatMatrix &answer, MatResponseMode rMode, TimeStep *tStep)
	Computes the stiffness matrix of receiver. More...

virtual void	giveInternalForcesVector (FloatArray &answer, TimeStep *tStep, int useUpdatedGpRecord=0)
	Evaluates nodal representation of real internal forces. More...

void	giveInternalForcesVector_withIRulesAsSubcells (FloatArray &answer, TimeStep *tStep, int useUpdatedGpRecord=0)
	Evaluates nodal representation of real internal forces. More...

virtual void	computeDeformationGradientVector (FloatArray &answer, GaussPoint gp, TimeStep tStep)
	Computes the deformation gradient in Voigt form at integration point ip and at time step tStep. More...

double	computeCurrentVolume (TimeStep *tStep)
	Computes the current volume of element. More...

virtual IRResultType	initializeFrom (InputRecord *ir)
	Initializes receiver according to object description stored in input record. More...

virtual void	giveInputRecord (DynamicInputRecord &input)
	Setups the input record string of receiver. More...

virtual const char *	giveClassName () const

Public Member Functions inherited from oofem::StructuralElement
	StructuralElement (int n, Domain *d)
	Constructor. More...

virtual	~StructuralElement ()
	Destructor. More...

virtual void	giveCharacteristicMatrix (FloatMatrix &answer, CharType, TimeStep *tStep)
	Computes characteristic matrix of receiver of requested type in given time step. More...

virtual void	giveCharacteristicVector (FloatArray &answer, CharType type, ValueModeType mode, TimeStep *tStep)
	Computes characteristic vector of receiver of requested type in given time step. More...

virtual void	computeMassMatrix (FloatMatrix &answer, TimeStep *tStep)
	Computes mass matrix of receiver. More...

virtual void	computeLumpedMassMatrix (FloatMatrix &answer, TimeStep *tStep)
	Computes lumped mass matrix of receiver. More...

virtual void	computeConsistentMassMatrix (FloatMatrix &answer, TimeStep tStep, double &mass, const double ipDensity=NULL)
	Computes consistent mass matrix of receiver using numerical integration over element volume. More...

virtual void	giveMassMtrxIntegrationgMask (IntArray &answer)
	Returns mask indicating, which unknowns (their type and ordering is the same as element unknown vector) participate in mass matrix integration. More...

void	computeStiffnessMatrix_withIRulesAsSubcells (FloatMatrix &answer, MatResponseMode rMode, TimeStep *tStep)

virtual void	computeField (ValueModeType mode, TimeStep *tStep, const FloatArray &lcoords, FloatArray &answer)
	Computes the unknown vector interpolated at the specified local coordinates. More...

virtual void	computeStrainVector (FloatArray &answer, GaussPoint gp, TimeStep tStep)
	Compute strain vector of receiver evaluated at given integration point at given time step from element displacement vector. More...

virtual int	giveIPValue (FloatArray &answer, GaussPoint gp, InternalStateType type, TimeStep tStep)
	Returns the integration point corresponding value in full form. More...

virtual void	computeResultingIPTemperatureAt (FloatArray &answer, TimeStep tStep, GaussPoint gp, ValueModeType mode)
	Computes at given time (tStep) the the resulting temperature component array. More...

virtual void	computeResultingIPEigenstrainAt (FloatArray &answer, TimeStep tStep, GaussPoint gp, ValueModeType mode)
	Computes at given time the resulting eigenstrain component array. More...

virtual int	adaptiveUpdate (TimeStep *tStep)
	Updates the internal state variables stored in all IPs according to already mapped state. More...

virtual void	updateInternalState (TimeStep *tStep)
	Updates element state after equilibrium in time step has been reached. More...

virtual void	updateYourself (TimeStep *tStep)
	Updates element state after equilibrium in time step has been reached. More...

virtual int	giveInternalStateAtNode (FloatArray &answer, InternalStateType type, InternalStateMode mode, int node, TimeStep *tStep)
	Returns internal state variable (like stress,strain) at node of element in Reduced form, the way how is obtained is dependent on InternalValueType. More...

virtual void	showSparseMtrxStructure (CharType mtrx, oofegGraphicContext &gc, TimeStep *tStep)
	Shows sparse structure. More...

virtual void	showExtendedSparseMtrxStructure (CharType mtrx, oofegGraphicContext &gc, TimeStep *tStep)
	Shows extended sparse structure (for example, due to nonlocal interactions for tangent stiffness) More...

virtual void	computeLoadVector (FloatArray &answer, BodyLoad load, CharType type, ValueModeType mode, TimeStep tStep)
	Computes the contribution of the given body load (volumetric). More...

virtual void	computeBoundarySurfaceLoadVector (FloatArray &answer, BoundaryLoad load, int boundary, CharType type, ValueModeType mode, TimeStep tStep, bool global=true)
	Computes the contribution of the given load at the given boundary surface in global coordinate system. More...

virtual void	computeBoundaryEdgeLoadVector (FloatArray &answer, BoundaryLoad load, int boundary, CharType type, ValueModeType mode, TimeStep tStep, bool global=true)
	Computes the contribution of the given load at the given boundary edge. More...

virtual void	computeEdgeNMatrix (FloatMatrix &answer, int boundaryID, const FloatArray &lcoords)
	computes edge interpolation matrix More...

virtual void	computeSurfaceNMatrix (FloatMatrix &answer, int boundaryID, const FloatArray &lcoords)
	Computes surface interpolation matrix. More...

virtual void	computeConstitutiveMatrixAt (FloatMatrix &answer, MatResponseMode rMode, GaussPoint gp, TimeStep tStep)=0
	Computes constitutive matrix of receiver. More...

StructuralCrossSection *	giveStructuralCrossSection ()
	Helper function which returns the structural cross-section for the element. More...

virtual void	createMaterialStatus ()

virtual void	computeStressVector (FloatArray &answer, const FloatArray &strain, GaussPoint gp, TimeStep tStep)=0
	Computes the stress vector of receiver at given integration point, at time step tStep. More...

virtual void	computeBmatrixAt (GaussPoint *gp, FloatMatrix &answer, int lowerIndx=1, int upperIndx=ALL_STRAINS)=0
	Computes the geometrical matrix of receiver in given integration point. More...

virtual void	computeNmatrixAt (const FloatArray &iLocCoord, FloatMatrix &answer)
	Computes interpolation matrix for element unknowns. More...

virtual void	updateBeforeNonlocalAverage (TimeStep *tStep)
	Updates internal element state (in all integration points of receiver) before nonlocal averaging takes place. More...

virtual void	giveNonlocalLocationArray (IntArray &locationArray, const UnknownNumberingScheme &us)
	Returns the "nonlocal" location array of receiver. More...

virtual void	addNonlocalStiffnessContributions (SparseMtrx &dest, const UnknownNumberingScheme &s, TimeStep *tStep)
	Adds the "nonlocal" contribution to stiffness matrix, to account for nonlocality of material model. More...

Public Member Functions inherited from oofem::Element
	Element (int n, Domain *aDomain)
	Constructor. More...

	Element (const Element &src)=delete

Element &	operator= (const Element &src)=delete

virtual	~Element ()
	Virtual destructor. More...

virtual void	drawYourself (oofegGraphicContext &gc, TimeStep *tStep)

virtual void	drawAnnotation (oofegGraphicContext &gc, TimeStep *tStep)

virtual void	drawRawGeometry (oofegGraphicContext &gc, TimeStep *tStep)

virtual void	drawDeformedGeometry (oofegGraphicContext &gc, TimeStep *tStep, UnknownType)

virtual void	drawScalar (oofegGraphicContext &gc, TimeStep *tStep)

virtual void	drawSpecial (oofegGraphicContext &gc, TimeStep *tStep)

virtual void	giveLocalIntVarMaxMin (oofegGraphicContext &gc, TimeStep *tStep, double &emin, double &emax)

virtual int	giveInternalStateAtSide (FloatArray &answer, InternalStateType type, InternalStateMode mode, int side, TimeStep *tStep)
	Returns internal state variable (like stress,strain) at side of element in Reduced form If side is possessing DOFs, otherwise recover techniques will not work due to absence of side-shape functions. More...

int	giveLabel () const

int	giveGlobalNumber () const

void	setGlobalNumber (int num)
	Sets receiver globally unique number. More...

elementParallelMode	giveParallelMode () const
	Return elementParallelMode of receiver. More...

void	setParallelMode (elementParallelMode _mode)
	Sets parallel mode of element. More...

virtual elementParallelMode	giveKnotSpanParallelMode (int) const
	Returns the parallel mode for particular knot span of the receiver. More...

int	packUnknowns (DataStream &buff, TimeStep *tStep)
	Pack all necessary data of element (according to its parallel_mode) integration points into given communication buffer. More...

int	unpackAndUpdateUnknowns (DataStream &buff, TimeStep *tStep)
	Unpack and updates all necessary data of element (according to its parallel_mode) integration points into given communication buffer. More...

int	estimatePackSize (DataStream &buff)
	Estimates the necessary pack size to hold all packed data of receiver. More...

const IntArray *	givePartitionList () const
	Returns partition list of receiver. More...

void	setPartitionList (IntArray &pl)
	Sets partition list of receiver. More...

virtual double	predictRelativeComputationalCost ()
	Returns the weight representing relative computational cost of receiver The reference element is triangular plane stress element with linear approximation, single integration point and linear isotropic material. More...

virtual double	giveRelativeSelfComputationalCost ()
	Returns the weight representing relative computational cost of receiver The reference element is triangular plane stress element. More...

virtual double	predictRelativeRedistributionCost ()
	Returns the relative redistribution cost of the receiver. More...

IntArray *	giveBodyLoadArray ()
	Returns array containing load numbers of loads acting on element. More...

IntArray *	giveBoundaryLoadArray ()
	Returns array containing load numbers of boundary loads acting on element. More...

virtual contextIOResultType	saveContext (DataStream &stream, ContextMode mode, void *obj=NULL)
	Stores receiver state to output stream. More...

virtual contextIOResultType	restoreContext (DataStream &stream, ContextMode mode, void *obj=NULL)
	Restores the receiver state previously written in stream. More...

virtual void	printOutputAt (FILE file, TimeStep tStep)
	Prints output of receiver to stream, for given time step. More...

void	giveLocationArray (IntArray &locationArray, const UnknownNumberingScheme &s, IntArray *dofIds=NULL) const
	Returns the location array (array of code numbers) of receiver for given numbering scheme. More...

void	giveLocationArray (IntArray &locationArray, const IntArray &dofIDMask, const UnknownNumberingScheme &s, IntArray *dofIds=NULL) const

virtual void	giveBoundaryLocationArray (IntArray &locationArray, const IntArray &bNodes, const UnknownNumberingScheme &s, IntArray *dofIds=NULL)
	Returns the location array for the boundary of the element. More...

virtual void	giveBoundaryLocationArray (IntArray &locationArray, const IntArray &bNodes, const IntArray &dofIDMask, const UnknownNumberingScheme &s, IntArray *dofIds=NULL)

virtual int	giveNumberOfDofs ()

virtual int	giveNumberOfInternalDofManagers () const

virtual DofManager *	giveInternalDofManager (int i) const
	Returns i-th internal element dof manager of the receiver. More...

virtual double	giveCharacteristicValue (CharType type, TimeStep *tStep)
	Computes characteristic value of receiver of requested type in given time step. More...

virtual void	computeTangentFromSurfaceLoad (FloatMatrix &answer, SurfaceLoad load, int boundary, MatResponseMode rmode, TimeStep tStep)
	Computes the tangent contribution of the given load at the given boundary. More...

virtual void	computeTangentFromEdgeLoad (FloatMatrix &answer, EdgeLoad load, int boundary, MatResponseMode rmode, TimeStep tStep)
	Computes the tangent contribution of the given load at the given boundary. More...

const IntArray &	giveBodyLoadList () const
	Returns receiver list of bodyloads. More...

const IntArray &	giveBoundaryLoadList () const
	Returns receiver list of boundary loads. More...

void	computeVectorOf (ValueModeType u, TimeStep *tStep, FloatArray &answer)
	Returns local vector of unknowns. More...

void	computeVectorOf (const IntArray &dofIDMask, ValueModeType u, TimeStep *tStep, FloatArray &answer, bool padding=false)

void	computeBoundaryVectorOf (const IntArray &bNodes, const IntArray &dofIDMask, ValueModeType u, TimeStep *tStep, FloatArray &answer, bool padding=false)
	Boundary version of computeVectorOf. More...

void	computeVectorOf (PrimaryField &field, const IntArray &dofIDMask, ValueModeType u, TimeStep *tStep, FloatArray &answer, bool padding=false)
	Returns local vector of unknowns. More...

void	computeVectorOfPrescribed (ValueModeType u, TimeStep *tStep, FloatArray &answer)
	Returns local vector of prescribed unknowns. More...

void	computeVectorOfPrescribed (const IntArray &dofIDMask, ValueModeType type, TimeStep *tStep, FloatArray &answer)
	Returns local vector of prescribed unknowns. More...

virtual int	computeNumberOfDofs ()
	Computes or simply returns total number of element's local DOFs. More...

virtual int	computeNumberOfGlobalDofs ()
	Computes the total number of element's global dofs. More...

int	computeNumberOfPrimaryMasterDofs ()
	Computes the total number of element's primary master DOFs. More...

virtual bool	computeGtoLRotationMatrix (FloatMatrix &answer)
	Returns transformation matrix from global c.s. More...

virtual bool	giveRotationMatrix (FloatMatrix &answer)
	Transformation matrices updates rotation matrix between element-local and primary DOFs, taking into account nodal c.s. More...

virtual bool	computeDofTransformationMatrix (FloatMatrix &answer, const IntArray &nodes, bool includeInternal)
	Returns transformation matrix for DOFs from global coordinate system to local coordinate system in nodes. More...

virtual void	giveDofManDofIDMask (int inode, IntArray &answer) const
	Returns dofmanager dof mask for node. More...

virtual void	giveInternalDofManDofIDMask (int inode, IntArray &answer) const
	Returns internal dofmanager dof mask for node. More...

virtual void	giveElementDofIDMask (IntArray &answer) const
	Returns element dof mask for node. More...

virtual double	computeVolumeAround (GaussPoint *gp)
	Returns volume related to given integration point. More...

virtual double	computeVolumeAreaOrLength ()
	Computes the volume, area or length of the element depending on its spatial dimension. More...

double	computeMeanSize ()
	Computes the size of the element defined as its length. More...

virtual double	computeVolume ()
	Computes the volume. More...

virtual double	computeArea ()
	Computes the area (zero for all but 2d geometries). More...

virtual double	computeLength ()
	Computes the length (zero for all but 1D geometries) More...

virtual void	giveBoundaryEdgeNodes (IntArray &bNodes, int boundary)
	Returns list of receiver boundary nodes for given edge. More...

virtual void	giveBoundarySurfaceNodes (IntArray &bNodes, int boundary)
	Returns list of receiver boundary nodes for given surface. More...

virtual IntegrationRule *	giveBoundaryEdgeIntegrationRule (int order, int boundary)
	Returns boundary edge integration rule. More...

virtual IntegrationRule *	giveBoundarySurfaceIntegrationRule (int order, int boundary)
	Returns boundary surface integration rule. More...

int	giveDofManagerNumber (int i) const
	Translates local to global indices for dof managers. More...

const IntArray &	giveDofManArray () const

void	addDofManager (DofManager *dMan)

DofManager *	giveDofManager (int i) const

Node *	giveNode (int i) const
	Returns reference to the i-th node of element. More...

virtual ElementSide *	giveSide (int i) const
	Returns reference to the i-th side of element. More...

virtual FEInterpolation *	giveInterpolation () const

virtual FEInterpolation *	giveInterpolation (DofIDItem id) const
	Returns the interpolation for the specific dof id. More...

virtual Material *	giveMaterial ()

int	giveMaterialNumber () const

CrossSection *	giveCrossSection ()

void	setMaterial (int matIndx)
	Sets the material of receiver. More...

virtual void	setCrossSection (int csIndx)
	Sets the cross section model of receiver. More...

virtual int	giveNumberOfDofManagers () const

virtual int	giveNumberOfNodes () const
	Returns number of nodes of receiver. More...

void	setDofManagers (const IntArray &dmans)
	Sets receiver dofManagers. More...

void	setBodyLoads (const IntArray &bodyLoads)
	Sets receiver bodyLoadArray. More...

void	setIntegrationRules (std::vector< std::unique_ptr< IntegrationRule > > irlist)
	Sets integration rules. More...

virtual integrationDomain	giveIntegrationDomain () const
	Returns integration domain for receiver, used to initialize integration point over receiver volume. More...

virtual MaterialMode	giveMaterialMode ()
	Returns material mode for receiver integration points. More...

virtual int	giveIntegrationRuleLocalCodeNumbers (IntArray &answer, IntegrationRule &ie)
	Assembles the code numbers of given integration element (sub-patch) This is done by obtaining list of nonzero shape functions and by collecting the code numbers of nodes corresponding to these shape functions. More...

int	giveRegionNumber ()

virtual void	postInitialize ()
	Performs post initialization steps. More...

virtual void	initializeYourself (TimeStep *timeStepWhenICApply)
	Initialization according to state given by initial conditions. More...

virtual bool	isActivated (TimeStep *tStep)

virtual bool	isCast (TimeStep *tStep)

virtual void	initForNewStep ()
	Initializes receivers state to new time step. More...

virtual Element_Geometry_Type	giveGeometryType () const
	Returns the element geometry type. More...

virtual int	giveSpatialDimension ()
	Returns the element spatial dimension (1, 2, or 3). More...

virtual int	giveNumberOfBoundarySides ()

virtual int	giveDefaultIntegrationRule () const
	Returns id of default integration rule. More...

virtual IntegrationRule *	giveDefaultIntegrationRulePtr ()
	Access method for default integration rule. More...

int	giveNumberOfIntegrationRules ()

virtual IntegrationRule *	giveIntegrationRule (int i)

std::vector< std::unique_ptr< IntegrationRule > > &	giveIntegrationRulesArray ()

virtual int	testElementExtension (ElementExtension ext)
	Tests if the element implements required extension. More...

int	giveGlobalIPValue (FloatArray &answer, GaussPoint gp, InternalStateType type, TimeStep tStep)

virtual double	giveLengthInDir (const FloatArray &normalToCrackPlane)
	Default implementation returns length of element projection into specified direction. More...

virtual double	giveCharacteristicLength (const FloatArray &normalToCrackPlane)
	Returns the size of element in the given direction, in some cases adjusted (e.g. More...

double	giveCharacteristicLengthForPlaneElements (const FloatArray &normalToCrackPlane)
	Returns the size of element in the given direction if the direction is in the XY plane, otherwise gives the mean size defined as the square root of the element area. More...

double	giveCharacteristicLengthForAxisymmElements (const FloatArray &normalToCrackPlane)
	Returns the size of an axisymmetric element in the given direction if the direction is in the XY plane, otherwise gives the mean distance vrom the symmetry axis multiplied by pi. More...

virtual double	giveCharacteristicSize (GaussPoint *gp, FloatArray &normalToCrackPlane, ElementCharSizeMethod method)
	Returns characteristic element size for a given integration point and given direction. More...

virtual double	giveParentElSize () const
	Returns the size (length, area or volume depending on element type) of the parent element. More...

virtual int	computeGlobalCoordinates (FloatArray &answer, const FloatArray &lcoords)
	Computes the global coordinates from given element's local coordinates. More...

virtual bool	computeLocalCoordinates (FloatArray &answer, const FloatArray &gcoords)
	Computes the element local coordinates from given global coordinates. More...

virtual int	giveLocalCoordinateSystem (FloatMatrix &answer)
	Returns local coordinate system of receiver Required by material models with ortho- and anisotrophy. More...

virtual void	computeMidPlaneNormal (FloatArray &answer, const GaussPoint *gp)
	Computes mid-plane normal of receiver at integration point. More...

virtual int	adaptiveMap (Domain oldd, TimeStep tStep)
	Initializes the internal state variables stored in all IPs according to state in given domain. More...

virtual int	mapStateVariables (Domain &iOldDom, const TimeStep &iTStep)
	Maps the internal state variables stored in all IPs from the old domain to the new domain. More...

virtual int	adaptiveFinish (TimeStep *tStep)
	Finishes the mapping for given time step. More...

virtual void	updateLocalNumbering (EntityRenumberingFunctor &f)
	Local renumbering support. More...

template<class T >
void	ipEvaluator (T src, void(T::f)(GaussPoint *gp))
	Integration point evaluator, loops over receiver IP's and calls given function (passed as f parameter) on them. The IP is parameter to function f. More...

template<class T , class S >
void	ipEvaluator (T src, void(T::f)(GaussPoint *, S &), S &_val)
	Integration point evaluator, loops over receiver IP's and calls given function (passed as f parameter) on them. The IP is parameter to function f as well as additional array. More...

Public Member Functions inherited from oofem::FEMComponent
	FEMComponent (int n, Domain *d)
	Regular constructor, creates component with given number and belonging to given domain. More...

virtual	~FEMComponent ()
	Virtual destructor. More...

virtual const char *	giveInputRecordName () const =0

Domain *	giveDomain () const

virtual void	setDomain (Domain *d)
	Sets associated Domain. More...

int	giveNumber () const

void	setNumber (int num)
	Sets number of receiver. More...

virtual void	printYourself ()
	Prints receiver state on stdout. Useful for debugging. More...

virtual Interface *	giveInterface (InterfaceType t)
	Interface requesting service. More...

std::string	errorInfo (const char *func) const
	Returns string for prepending output (used by error reporting macros). More...

Protected Member Functions
virtual int	checkConsistency ()
	Performs consistency check. More...

virtual void	computeBHmatrixAt (GaussPoint *gp, FloatMatrix &answer)
	Computes a matrix which, multiplied by the column matrix of nodal displacements, gives the displacement gradient stored by columns. More...

Protected Member Functions inherited from oofem::StructuralElement
virtual void	computeBodyLoadVectorAt (FloatArray &answer, Load load, TimeStep tStep, ValueModeType mode)
	Computes the load vector due to body load acting on receiver, at given time step. More...

virtual int	giveNumberOfIPForMassMtrxIntegration ()
	Return desired number of integration points for consistent mass matrix computation, if required. More...

void	condense (FloatMatrix stiff, FloatMatrix mass, FloatArray load, IntArray what)
	General service for condensation of stiffness and optionally load vector and mass or initial stress matrices of receiver. More...

virtual void	setupIRForMassMtrxIntegration (IntegrationRule &iRule)
	Setup Integration Rule Gauss Points for Mass Matrix integration. More...

virtual void	computePointLoadVectorAt (FloatArray &answer, Load load, TimeStep tStep, ValueModeType mode, bool global=true)
	Computes point load vector contribution of receiver for given load (should has BoundaryLoad Base). More...

virtual void	giveEdgeDofMapping (IntArray &answer, int iEdge) const
	Assembles edge dof mapping mask, which provides mapping between edge local DOFs and "global" element DOFs. More...

virtual void	giveSurfaceDofMapping (IntArray &answer, int iSurf) const
	Assembles surface dof mapping mask, which provides mapping between surface local DOFs and "global" element DOFs. More...

virtual IntegrationRule *	GetSurfaceIntegrationRule (int order)

virtual double	computeEdgeVolumeAround (GaussPoint *gp, int iEdge)
	Computes volume related to integration point on local edge. More...

virtual double	computeSurfaceVolumeAround (GaussPoint *gp, int iSurf)
	Computes volume related to integration point on local surface. More...

virtual int	computeLoadGToLRotationMtrx (FloatMatrix &answer)
	Returns transformation matrix from global coordinate system to local element coordinate system for element load vector components. More...

virtual int	computeLoadLEToLRotationMatrix (FloatMatrix &answer, int iEdge, GaussPoint *gp)
	Returns transformation matrix from local edge c.s to element local coordinate system of load vector components. More...

virtual int	computeLoadLSToLRotationMatrix (FloatMatrix &answer, int iSurf, GaussPoint *gp)
	Returns transformation matrix from local surface c.s to element local coordinate system of load vector components. More...

Protected Member Functions inherited from oofem::Element
virtual void	computeGaussPoints ()
	Initializes the array of integration rules member variable. More...

Protected Attributes
int	nlGeometry
	Flag indicating if geometrical nonlinearities apply. More...

Protected Attributes inherited from oofem::StructuralElement
std::unique_ptr< FloatArray >	initialDisplacements
	Initial displacement vector, describes the initial nodal displacements when element has been casted. More...

Protected Attributes inherited from oofem::Element
int	numberOfDofMans
	Number of dofmanagers. More...

IntArray	dofManArray
	Array containing dofmanager numbers. More...

int	material
	Number of associated material. More...

int	crossSection
	Number of associated cross section. More...

IntArray	bodyLoadArray
	Array containing indexes of loads (body loads and boundary loads are kept separately), that apply on receiver. More...

IntArray	boundaryLoadArray

std::vector< std::unique_ptr< IntegrationRule > >	integrationRulesArray
	List of integration rules of receiver (each integration rule contains associated integration points also). More...

FloatMatrix	elemLocalCS
	Transformation material matrix, used in orthotropic and anisotropic materials, global->local transformation. More...

int	activityTimeFunction
	Element activity time function. If defined, nonzero value indicates active receiver, zero value inactive element. More...

int	globalNumber
	In parallel mode, globalNumber contains globally unique DoFManager number. More...

int	numberOfGaussPoints
	Number of integration points as specified by nip. More...

elementParallelMode	parallel_mode
	Determines the parallel mode of the element. More...

IntArray	partitions
	List of partition sharing the shared element or remote partition containing remote element counterpart. More...

Protected Attributes inherited from oofem::FEMComponent
int	number
	Component number. More...

Domain *	domain
	Link to domain object, useful for communicating with other FEM components. More...

Friends
class	GradDpElement

class	PhaseFieldElement

class	XfemStructuralElementInterface

Detailed Description

Abstract base class for "structural" finite elements with geometrical nonlinearities.

The base class StructuralElement supports nonlinearities at constitutive level. The new implementation of relevant services is extended to incorporate general geometric nonlinearity. The services for computing nonlinear parts of geometrical equations for particular strain components are provided. The updated services for stiffness, strain and internal forces computations are formulated.

The activation of non-linear effects can be generally controlled on element level using nlGeometry, allowing elements to be used also in linear computations. nlGeometry = 0 - Small strain theory based on the engineering stress and strain nlGeometry = 1 - Finite deformation theory formulated in terms of the deformation gradient F and first Piola-Kirchoff stress P in the virtual work

Note: Methods ComputeStressVector and computeStrainVector as they are implemented here assume Total Lagrange approach.

Tasks :

Defining itself
Calculating its contribution to the problem:
- calculating its mass matrix M, its stiffness matrix K, its load vector f, its location array ;
- calculating its contribution to the LHS and RHS of the linear system, using Static, Newmark,etc, formula. These contributions are usually combinations of M,K,f.
Performing end-of-step operations:
- calculating the strains and stresses at its Gauss points ;
- printing its output in the data file and updating itself ;

Author: Jim Brouzoulis (among others)

Definition at line 86 of file nlstructuralelement.h.

Constructor & Destructor Documentation

oofem::NLStructuralElement::NLStructuralElement	(	int	n,
		Domain *	d
	)

Constructor.

Creates element with given number, belonging to given domain.

Parameters

n	Element number.
d	Domain to which new material will belong.

Definition at line 52 of file nlstructuralelement.C.

References nlGeometry.

virtual oofem::NLStructuralElement::~NLStructuralElement ( )

inlinevirtual

Destructor.

Definition at line 100 of file nlstructuralelement.h.

Member Function Documentation

int oofem::NLStructuralElement::checkConsistency ( )

protectedvirtual

Performs consistency check.

This method is called at startup for all elements in particular domain. This method is intended to check data compatibility. Particular element types should test if compatible material and crossSection both with required capabilities are specified. Derived classes should provide their own analysis specific tests. Some printed input if incompatibility is found should be provided (error or warning member functions). Method can be also used to initialize some variables, since this is invoked after all domain components are instanciated.

Returns: Zero value if check fail, otherwise nonzero.

Reimplemented from oofem::StructuralElement.

Reimplemented in oofem::Shell7BaseXFEM, oofem::SolidShell, oofem::Shell7Base, and oofem::TrPlaneStress2dXFEM.

Definition at line 575 of file nlstructuralelement.C.

References nlGeometry, and OOFEM_ERROR.

Referenced by oofem::TrPlaneStress2dXFEM::checkConsistency(), oofem::Shell7Base::checkConsistency(), and giveClassName().

virtual void oofem::NLStructuralElement::computeBHmatrixAt	(	GaussPoint *	gp,
		FloatMatrix &	answer
	)

inlineprotectedvirtual

Computes a matrix which, multiplied by the column matrix of nodal displacements, gives the displacement gradient stored by columns.

The components of this matrix are derivatives of the shape functions, but they are arranged in a somewhat different way from the usual B matrix.

Parameters

gp	Integration point.
answer	BF matrix at this point.

Reimplemented in oofem::AxisymElement, oofem::PlaneStrainElement, oofem::PlaneStressElement, oofem::Truss2d, oofem::tet21ghostsolid, oofem::PlaneStress2d, oofem::Quad1PlaneStrain, oofem::Structural2DElement, oofem::Structural3DElement, oofem::QTruss1d, oofem::TrPlaneStress2dXFEM, oofem::QTrPlaneStress2dXFEM, oofem::PlaneStress2dXfem, and oofem::SolidShell.

Definition at line 231 of file nlstructuralelement.h.

References OOFEM_ERROR.

Referenced by oofem::GradDpElement::computeDeformationGradientVector(), computeDeformationGradientVector(), computeStiffnessMatrix(), oofem::GradDpElement::computeStiffnessMatrix_ku(), oofem::GradDpElement::computeStiffnessMatrix_uk(), oofem::GradDpElement::computeStiffnessMatrix_uu(), computeStiffnessMatrix_withIRulesAsSubcells(), oofem::GradDpElement::giveInternalForcesVector(), giveInternalForcesVector(), giveInternalForcesVector_withIRulesAsSubcells(), oofem::GradDpElement::giveLocalInternalForcesVector(), and oofem::XfemStructuralElementInterface::XfemElementInterface_computeDeformationGradientVector().

void oofem::NLStructuralElement::computeCauchyStressVector	(	FloatArray &	answer,
		GaussPoint *	gp,
		TimeStep *	tStep
	)

Computes the Cauchy stress tensor on Voigt format.

This method will be called if nlGeo = 1 and mode = UL. This method computes the deformation gradient F and passes it on to the crossection which then asks for the stress from the material.

Parameters

answer	Computed stress vector in Voigt form.
gp	Gauss point at which the stress is evaluated.
tStep	Time step.

Definition at line 133 of file nlstructuralelement.C.

References computeDeformationGradientVector(), oofem::StructuralCrossSection::giveCauchyStresses(), and oofem::StructuralElement::giveStructuralCrossSection().

Referenced by giveGeometryMode(), giveInternalForcesVector(), and giveInternalForcesVector_withIRulesAsSubcells().

double oofem::NLStructuralElement::computeCurrentVolume ( TimeStep * tStep )

Computes the current volume of element.

Definition at line 61 of file nlstructuralelement.C.

References oofem::FloatMatrix::beMatrixForm(), computeDeformationGradientVector(), oofem::Element::giveDefaultIntegrationRulePtr(), oofem::FloatMatrix::giveDeterminant(), oofem::Element::giveInterpolation(), and oofem::FEInterpolation::giveTransformationJacobian().

Referenced by giveGeometryMode().

void oofem::NLStructuralElement::computeDeformationGradientVector	(	FloatArray &	answer,
		GaussPoint *	gp,
		TimeStep *	tStep
	)

virtual

Computes the deformation gradient in Voigt form at integration point ip and at time step tStep.

Computes the displacement gradient and adds an identitiy tensor.

Parameters

answer	Deformation gradient vector
gp	Gauss point.
tStep	Time step.

Reimplemented in oofem::QTrPlaneStress2dXFEM, oofem::TrPlaneStress2dXFEM, oofem::tet21ghostsolid, and oofem::PlaneStress2dXfem.

Definition at line 84 of file nlstructuralelement.C.

References oofem::__MaterialModeToString(), oofem::FloatArray::at(), oofem::FloatArray::beProductOf(), computeBHmatrixAt(), oofem::Element::computeVectorOf(), oofem::GaussPoint::giveMaterialMode(), oofem::StructuralElement::initialDisplacements, OOFEM_ERROR, and oofem::FloatArray::subtract().

Referenced by computeCauchyStressVector(), computeCurrentVolume(), computeFirstPKStressVector(), oofem::MaterialForceEvaluator::computeMaterialForce(), and giveGeometryMode().

void oofem::NLStructuralElement::computeFirstPKStressVector	(	FloatArray &	answer,
		GaussPoint *	gp,
		TimeStep *	tStep
	)

Computes the first Piola-Kirchhoff stress tensor on Voigt format.

This method will be called if nlGeo = 1 and mode = TL. This method computes the deformation gradient F and passes it on to the crossection which then asks for the stress from the material.

Note: P is related to S through F*S.

Parameters

answer	Computed stress vector in Voigt form.
gp	Gauss point at which the stress is evaluated.
tStep	Time step.

Definition at line 120 of file nlstructuralelement.C.

References computeDeformationGradientVector(), oofem::StructuralCrossSection::giveFirstPKStresses(), and oofem::StructuralElement::giveStructuralCrossSection().

Referenced by giveGeometryMode(), giveInternalForcesVector(), and giveInternalForcesVector_withIRulesAsSubcells().

void oofem::NLStructuralElement::computeInitialStressMatrix	(	FloatMatrix &	answer,
		TimeStep *	tStep
	)

virtual

Computes the initial stiffness matrix of receiver.

This method is used only if mode = UL The response is evaluated using $\int B ({\mathrm{\sigma}}\otimes \delta )B_{\mathrm{H}} \;\mathrm{d}v$ , where $ B $ is the classical B-matrix, but computed wrt updated node position

Parameters

answer	Computed initial stiffness matrix.
tStep	Time step.

Reimplemented from oofem::StructuralElement.

Reimplemented in oofem::LIBeam2dNL.

Definition at line 506 of file nlstructuralelement.C.

References oofem::FloatArray::at(), oofem::FloatMatrix::at(), oofem::FloatMatrix::beSubMatrixOf(), oofem::FloatMatrix::clear(), oofem::StructuralElement::computeBmatrixAt(), oofem::Element::computeVolumeAround(), oofem::Element::giveDefaultIntegrationRulePtr(), oofem::StructuralElement::giveIPValue(), oofem::FloatArray::giveSize(), OOFEM_WARNING, oofem::FloatMatrix::plusProductSymmUpper(), and oofem::FloatMatrix::symmetrized().

Referenced by computeStiffnessMatrix(), oofem::GradDpElement::computeStiffnessMatrix_uu(), giveGeometryMode(), and oofem::GradDpElement::giveInternalForcesVector().

void oofem::NLStructuralElement::computeStiffnessMatrix	(	FloatMatrix &	answer,
		MatResponseMode	rMode,
		TimeStep *	tStep
	)

virtual

Computes the stiffness matrix of receiver.

The response is evaluated using $\int B_{\mathrm{H}}^{\mathrm{T}} D B_{\mathrm{H}} \;\mathrm{d}v$ , where $B_{\mathrm{H}}$ is the B-matrix which produces the displacement gradient vector $H_{\mathrm{V}}$ when multiplied with the solution vector a. Reduced integration are taken into account.

Parameters

answer	Computed stiffness matrix.
rMode	Response mode.
tStep	Time step.

Todo:: We probably need overloaded function (like above) here as well.

Todo:: We probably need overloaded function (like above) here as well.

Todo:: Verify that it works with large deformations

Reimplemented from oofem::StructuralElement.

Reimplemented in oofem::Shell7Base, oofem::AbaqusUserElement, oofem::MITC4Shell, oofem::LIBeam3dNL, oofem::Quad1MindlinShell3D, oofem::LIBeam3dNL2, oofem::TrPlanestressRotAllman, oofem::Shell7BaseXFEM, oofem::LIBeam3d2, oofem::QTrPlaneStress2dXFEM, oofem::TrPlaneStress2dXFEM, oofem::PlaneStress2dXfem, oofem::QTRSpaceGrad, oofem::QWedgeGrad, oofem::tet21ghostsolid, oofem::SolidShell, oofem::QTruss1dGrad, oofem::MacroLSpace, oofem::PlaneStressPhF2d, oofem::QPlaneStressPhF2d, oofem::QPlaneStrainGrad, oofem::QTrPlaneStressGrad, oofem::CoupledFieldsElement, oofem::QPlaneStressGrad, and oofem::QTrPlaneStrainGrad.

Definition at line 327 of file nlstructuralelement.C.

References oofem::FloatMatrix::add(), oofem::AL, oofem::FloatMatrix::beProductOf(), oofem::FloatMatrix::beSubMatrixOf(), oofem::FloatMatrix::clear(), computeBHmatrixAt(), oofem::StructuralElement::computeBmatrixAt(), oofem::StructuralElement::computeConstitutiveMatrixAt(), computeInitialStressMatrix(), oofem::Element::computeVolumeAround(), oofem::FEMComponent::domain, oofem::Element::giveDefaultIntegrationRulePtr(), oofem::Domain::giveEngngModel(), oofem::EngngModel::giveFormulation(), oofem::StructuralCrossSection::giveStiffnessMatrix_dCde(), oofem::StructuralCrossSection::giveStiffnessMatrix_dPdF(), oofem::StructuralElement::giveStructuralCrossSection(), oofem::Element::integrationRulesArray, oofem::Element::isActivated(), oofem::StructuralCrossSection::isCharacteristicMtrxSymmetric(), nlGeometry, OOFEM_ERROR, oofem::FloatMatrix::plusProductSymmUpper(), oofem::FloatMatrix::plusProductUnsym(), and oofem::FloatMatrix::symmetrized().

Referenced by oofem::SolidShell::computeStiffnessMatrix(), oofem::PlaneStress2dXfem::computeStiffnessMatrix(), oofem::QTrPlaneStress2dXFEM::computeStiffnessMatrix(), oofem::TrPlaneStress2dXFEM::computeStiffnessMatrix(), oofem::TrPlanestressRotAllman::computeStiffnessMatrix(), oofem::MITC4Shell::computeStiffnessMatrix(), and giveGeometryMode().

void oofem::NLStructuralElement::computeStiffnessMatrix_withIRulesAsSubcells	(	FloatMatrix &	answer,
		MatResponseMode	rMode,
		TimeStep *	tStep
	)

Computes the stiffness matrix of receiver.

The response is evaluated using $\int B_{\mathrm{H}}^{\mathrm{T}} D B_{\mathrm{H}} \;\mathrm{d}v$ , where $B_{\mathrm{H}}$ is the B-matrix which produces the displacement gradient vector $H_{\mathrm{V}}$ when multiplied with the solution vector a.

Note: Reduced intergration is not taken into account. The integration procedure uses an integrationRulesArray for numerical integration. Each integration rule is considered to represent a separate sub-cell/element. Typically this would be used when integration of the element domain needs special treatment, e.g. when using the XFEM.

Parameters

answer	Computed stiffness matrix.
rMode	Response mode.
tStep	Time step.

Definition at line 447 of file nlstructuralelement.C.

References oofem::AL, oofem::FloatMatrix::assemble(), oofem::FloatMatrix::beProductOf(), oofem::FloatMatrix::clear(), computeBHmatrixAt(), oofem::StructuralElement::computeBmatrixAt(), oofem::StructuralElement::computeConstitutiveMatrixAt(), oofem::Element::computeVolumeAround(), oofem::FEMComponent::domain, oofem::Domain::giveEngngModel(), oofem::EngngModel::giveFormulation(), oofem::Element::giveIntegrationRuleLocalCodeNumbers(), oofem::Element::giveInterpolation(), oofem::StructuralCrossSection::giveStiffnessMatrix_dCde(), oofem::StructuralCrossSection::giveStiffnessMatrix_dPdF(), oofem::StructuralElement::giveStructuralCrossSection(), oofem::Element::integrationRulesArray, oofem::Element::isActivated(), oofem::StructuralCrossSection::isCharacteristicMtrxSymmetric(), nlGeometry, oofem::FloatMatrix::plusProductSymmUpper(), oofem::FloatMatrix::plusProductUnsym(), and oofem::FloatMatrix::symmetrized().

Referenced by giveGeometryMode().

virtual const char* oofem::NLStructuralElement::giveClassName ( ) const

inlinevirtual

Returns: Class name of the receiver.

Reimplemented from oofem::StructuralElement.

Reimplemented in oofem::AbaqusUserElement, oofem::Shell7BaseXFEM, oofem::MITC4Shell, oofem::DKTPlate, oofem::QDKTPlate, oofem::RerShell, oofem::DKTPlate3d, oofem::CCTPlate3d, oofem::LIBeam3d2, oofem::CCTPlate, oofem::TrPlaneStrRot3d, oofem::Quad1MindlinShell3D, oofem::Tr2Shell7, oofem::Truss2d, oofem::LinQuad3DPlaneStress, oofem::TrPlaneStrain, oofem::Tr2Shell7XFEM, oofem::LSpace, oofem::Truss3d, oofem::Quad1PlaneStrain, oofem::PlaneStress2d, oofem::LIBeam3dNL, oofem::TrPlanestressRotAllman3d, oofem::Axisymm3d, oofem::tet21ghostsolid, oofem::LIBeam3dNL2, oofem::TrPlaneStress2d, oofem::QTRSpace, oofem::TrPlanestressRotAllman, oofem::Quad1Mindlin, oofem::LIBeam2dNL, oofem::Shell7Base, oofem::QSpace, oofem::QWedge, oofem::SolidShell, oofem::TrPlaneStrRot, oofem::LWedge, oofem::QTrPlaneStrain, oofem::LTRSpace, oofem::Q27Space, oofem::BasicElement, oofem::QTrPlaneStress2d, oofem::QTruss1d, oofem::TrPlaneStress2dXFEM, oofem::Q4Axisymm, oofem::QTrPlaneStress2dXFEM, oofem::BasicElementQuad, oofem::L4Axisymm, oofem::MacroLSpace, oofem::QSpaceGrad, oofem::PlaneStressPhF2d, oofem::PlaneStress2dXfem, oofem::QPlaneStress2d, oofem::QTRSpaceGrad, oofem::QWedgeGrad, oofem::Q9PlaneStress2d, oofem::QPlaneStressPhF2d, oofem::QPlaneStrain, oofem::QTruss1dGrad, oofem::QPlaneStrainGrad, oofem::QPlaneStressGrad, oofem::QTrPlaneStressGrad, oofem::QTrPlaneStrainGrad, and oofem::LSpaceBB.

Definition at line 218 of file nlstructuralelement.h.

References checkConsistency().

int oofem::NLStructuralElement::giveGeometryMode ( )

inline

Returns the geometry mode describing the formulation used in the internal work 0 - Engineering (small deformation) stress-strain mode 1 - First Piola-Kirchhoff - Deformation gradient mode, P is defined as FS 2 - Second Piola-Kirchhoff - Green-Lagrange strain mode with deformation gradient as input (deprecated and not supported)

Definition at line 108 of file nlstructuralelement.h.

References computeCauchyStressVector(), computeCurrentVolume(), computeDeformationGradientVector(), computeFirstPKStressVector(), computeInitialStressMatrix(), computeStiffnessMatrix(), computeStiffnessMatrix_withIRulesAsSubcells(), giveInputRecord(), giveInternalForcesVector(), giveInternalForcesVector_withIRulesAsSubcells(), initializeFrom(), and nlGeometry.

Referenced by oofem::GradDpElement::computeStiffnessMatrix_ku(), oofem::GradDpElement::computeStiffnessMatrix_uk(), oofem::GradDpElement::computeStiffnessMatrix_uu(), oofem::GradDpElement::computeStressVectorAndLocalCumulatedStrain(), oofem::GradDpElement::giveInternalForcesVector(), oofem::GradDpElement::giveLocalInternalForcesVector(), and oofem::PhaseFieldElement::initializeFrom().

void oofem::NLStructuralElement::giveInputRecord ( DynamicInputRecord & input )

virtual

Setups the input record string of receiver.

Parameters

input Dynamic input record to be filled by receiver.

Reimplemented from oofem::StructuralElement.

Reimplemented in oofem::AbaqusUserElement, oofem::TrPlaneStress2dXFEM, oofem::PlaneStress2dXfem, and oofem::QTrPlaneStress2dXFEM.

Definition at line 567 of file nlstructuralelement.C.

References _IFT_NLStructuralElement_nlgeoflag, oofem::StructuralElement::giveInputRecord(), nlGeometry, and oofem::DynamicInputRecord::setField().

Referenced by giveGeometryMode(), oofem::QTrPlaneStress2dXFEM::giveInputRecord(), oofem::PlaneStress2dXfem::giveInputRecord(), and oofem::TrPlaneStress2dXFEM::giveInputRecord().

void oofem::NLStructuralElement::giveInternalForcesVector	(	FloatArray &	answer,
		TimeStep *	tStep,
		int	useUpdatedGpRecord = `0`
	)

virtual

Evaluates nodal representation of real internal forces.

Necessary transformations are taken into account.

Todo:: what is meant?

Parameters

answer	Equivalent nodal forces vector.
tStep	Time step
useUpdatedGpRecord	If equal to zero, the stresses in integration points are computed (slow but safe).

Todo:: Is this really what we should do for inactive elements?

Todo:: This is actaully inefficient since it constructs B and twice and collects the nodal unknowns over and over.

Todo:: is this check really necessary?

Reimplemented from oofem::StructuralElement.

Reimplemented in oofem::Shell7Base, oofem::AbaqusUserElement, oofem::LIBeam3dNL, oofem::MITC4Shell, oofem::Quad1MindlinShell3D, oofem::LIBeam3dNL2, oofem::QTrPlaneStress2dXFEM, oofem::TrPlaneStress2dXFEM, oofem::PlaneStress2dXfem, oofem::MacroLSpace, oofem::tet21ghostsolid, oofem::Shell7BaseXFEM, oofem::QTRSpaceGrad, oofem::QWedgeGrad, oofem::QTruss1dGrad, oofem::SolidShell, oofem::PlaneStressPhF2d, oofem::QPlaneStressPhF2d, oofem::QPlaneStrainGrad, oofem::QTrPlaneStressGrad, oofem::CoupledFieldsElement, oofem::QPlaneStressGrad, and oofem::QTrPlaneStrainGrad.

Definition at line 146 of file nlstructuralelement.C.

References oofem::AL, oofem::FloatArray::beProductOf(), oofem::FloatArray::clear(), computeBHmatrixAt(), oofem::StructuralElement::computeBmatrixAt(), computeCauchyStressVector(), computeFirstPKStressVector(), oofem::StructuralElement::computeStressVector(), oofem::Element::computeVectorOf(), oofem::Element::computeVolumeAround(), oofem::FEMComponent::domain, oofem::StructuralMaterialStatus::giveCVector(), oofem::Element::giveDefaultIntegrationRulePtr(), oofem::Domain::giveEngngModel(), oofem::EngngModel::giveFormulation(), oofem::StructuralMaterialStatus::givePVector(), oofem::StructuralMaterial::giveReducedSymVectorForm(), oofem::StructuralMaterial::giveReducedVectorForm(), oofem::FloatArray::giveSize(), oofem::StructuralMaterial::giveSizeOfVoigtSymVector(), oofem::StructuralMaterialStatus::giveStressVector(), oofem::StructuralElement::initialDisplacements, oofem::Element::isActivated(), nlGeometry, oofem::FloatArray::plusProduct(), oofem::FloatArray::resize(), oofem::FloatArray::subtract(), and oofem::FloatArray::zero().

Referenced by giveGeometryMode(), oofem::SolidShell::giveInternalForcesVector(), oofem::PlaneStress2dXfem::giveInternalForcesVector(), oofem::TrPlaneStress2dXFEM::giveInternalForcesVector(), oofem::QTrPlaneStress2dXFEM::giveInternalForcesVector(), and oofem::MITC4Shell::giveInternalForcesVector().

void oofem::NLStructuralElement::giveInternalForcesVector_withIRulesAsSubcells	(	FloatArray &	answer,
		TimeStep *	tStep,
		int	useUpdatedGpRecord = `0`
	)

virtual

Evaluates nodal representation of real internal forces.

Numerical integration procedure uses integrationRulesArray for numerical integration. The integration procedure uses an integrationRulesArray for numerical integration. Each integration rule is considered to represent a separate sub-cell/element. Typically this would be used when integration of the element domain needs special treatment, e.g. when using the XFEM.

Parameters

answer	Equivalent nodal forces vector.
tStep	Time step.
useUpdatedGpRecord	If equal to zero, the stresses in the integration points are computed (slow but safe).

Reimplemented from oofem::StructuralElement.

Definition at line 239 of file nlstructuralelement.C.

References oofem::AL, oofem::FloatArray::assemble(), oofem::FloatArray::clear(), computeBHmatrixAt(), oofem::StructuralElement::computeBmatrixAt(), computeCauchyStressVector(), computeFirstPKStressVector(), oofem::StructuralElement::computeStrainVector(), oofem::StructuralElement::computeStressVector(), oofem::Element::computeVolumeAround(), oofem::FEMComponent::domain, oofem::StructuralMaterialStatus::giveCVector(), oofem::Domain::giveEngngModel(), oofem::EngngModel::giveFormulation(), oofem::Element::giveIntegrationRuleLocalCodeNumbers(), oofem::Element::giveInterpolation(), oofem::StructuralMaterialStatus::givePVector(), oofem::FloatArray::giveSize(), oofem::StructuralMaterialStatus::giveStressVector(), oofem::Element::integrationRulesArray, oofem::Element::isActivated(), nlGeometry, oofem::FloatArray::plusProduct(), and oofem::FloatArray::zero().

Referenced by giveGeometryMode().

IRResultType oofem::NLStructuralElement::initializeFrom ( InputRecord * ir )

virtual

Initializes receiver according to object description stored in input record.

This function is called immediately after creating object using constructor. Input record can be imagined as data record in component database belonging to receiver. Receiver may use value-name extracting functions to extract particular field from record.