chrono::fea::ChElementHexahedron Class Reference

Description

Class for hexahedral elements.

#include <ChElementHexahedron.h>

Inheritance diagram for chrono::fea::ChElementHexahedron:
Collaboration diagram for chrono::fea::ChElementHexahedron:

Public Member Functions

virtual void Update ()
 Update: this is called at least at each time step. More...
 
- Public Member Functions inherited from chrono::fea::ChElement3D
double GetVolume ()
 
- Public Member Functions inherited from chrono::fea::ChElementGeneric
ChKblockGenericKstiffness ()
 Access the proxy to stiffness, for sparse solver.
 
virtual void EleIntLoadResidual_F (ChVectorDynamic<> &R, const double c) override
 (This is a default (a bit unoptimal) book keeping so that in children classes you can avoid implementing this EleIntLoadResidual_F function, unless you need faster code)
 
virtual void EleIntLoadResidual_Mv (ChVectorDynamic<> &R, const ChVectorDynamic<> &w, const double c) override
 (This is a default (VERY UNOPTIMAL) book keeping so that in children classes you can avoid implementing this EleIntLoadResidual_Mv function, unless you need faster code.)
 
virtual void ComputeMmatrixGlobal (ChMatrix<> &M) override
 Returns the global mass matrix. More...
 
virtual void InjectKRMmatrices (ChSystemDescriptor &mdescriptor) override
 Tell to a system descriptor that there are item(s) of type ChKblock in this object (for further passing it to a solver)
 
virtual void KRMmatricesLoad (double Kfactor, double Rfactor, double Mfactor) override
 Adds the current stiffness K and damping R and mass M matrices in encapsulated ChKblock item(s), if any. More...
 
virtual void VariablesFbLoadInternalForces (double factor=1.) override
 Adds the internal forces, expressed as nodal forces, into the encapsulated ChVariables, in the 'fb' part: qf+=forces*factor (This is a default (a bit unoptimal) book keeping so that in children classes you can avoid implementing this VariablesFbLoadInternalForces function, unless you need faster code)
 
virtual void VariablesFbIncrementMq () override
 Adds M*q (internal masses multiplied current 'qb') to Fb, ex. More...
 
- Public Member Functions inherited from chrono::fea::ChElementBase
virtual int GetNnodes ()=0
 Gets the number of nodes used by this element.
 
virtual int GetNdofs ()=0
 Gets the number of coordinates in the field used by the referenced nodes. More...
 
virtual int GetNodeNdofs (int n)=0
 Get the number of coordinates from the n-th node that are used by this element. More...
 
virtual std::shared_ptr
< ChNodeFEAbase
GetNodeN (int n)=0
 Access the nth node.
 
virtual void GetStateBlock (ChMatrixDynamic<> &mD)=0
 Fills the D vector (column matrix) with the current field values at the nodes of the element, with proper ordering. More...
 
virtual void ComputeNodalMass ()
 Compute element's nodal masses.
 
virtual void ComputeKRMmatricesGlobal (ChMatrix<> &H, double Kfactor, double Rfactor=0, double Mfactor=0)=0
 Sets H as the stiffness matrix K, scaled by Kfactor. More...
 
virtual void ComputeInternalForces (ChMatrixDynamic<> &Fi)=0
 Computes the internal forces (ex. More...
 
virtual void SetupInitial (ChSystem *system)
 Initial setup: This is used mostly to precompute matrices that do not change during the simulation, i.e. More...
 
- Public Member Functions inherited from chrono::fea::ChElementCorotational
ChMatrix33Rotation ()
 Access the cumulative rotation matrix of the element, The rotation is expressed relative to initial reference position of element. More...
 
virtual void UpdateRotation ()=0
 Given the actual position of the nodes, recompute the cumulative rotation matrix A. More...
 

Public Attributes

int ID
 

Protected Attributes

ChGaussIntegrationRuleir
 
std::vector< ChGaussPoint * > GpVector
 
- Protected Attributes inherited from chrono::fea::ChElement3D
double Volume
 
- Protected Attributes inherited from chrono::fea::ChElementGeneric
ChKblockGeneric Kmatr
 
- Protected Attributes inherited from chrono::fea::ChElementCorotational
ChMatrix33 A
 

Member Function Documentation

virtual void chrono::fea::ChElementHexahedron::Update ( )
virtual

Update: this is called at least at each time step.

If the element has to keep updated some auxiliary data, such as the rotation matrices for corotational approach, this is the proper place.

Reimplemented from chrono::fea::ChElementBase.