chrono::fea Namespace Reference

Description

Namespace for FEA classes.

Namespaces
	rotutils
	Utility functions for rotations in 3D and their derivatives.

Classes
class	ChBeamMaterialInternalData
	Base class for internal variables of materials. More...
class	ChBeamSection
	Base class for properties of beam sections. More...
class	ChBeamSectionCable
	Simplified geometry for a 'cable' beam section in 3D, that is a beam without torsional stiffness and with circular section (i.e.same Ixx and Iyy properties). More...
class	ChBeamSectionCosserat
	Base class for properties of beam sections of Cosserat type (with shear too) such as ChElementBeamIGA. More...
class	ChBeamSectionCosseratEasyCircular
	A simple specialization of ChBeamSectionCosserat if you do not need to define its separate models for elasticity, plasticity, damping and inertia. More...
class	ChBeamSectionCosseratEasyRectangular
	A simple specialization of ChBeamSectionCosserat if you do not need to define its separate models for elasticity, plasticity, damping and inertia. More...
class	ChBeamSectionEuler
	Base class for all constitutive models of sections of Euler beams. More...
class	ChBeamSectionEulerAdvanced
	Advanced section of an Euler-Bernoulli beam in 3D, for a homogeneous density and homogeneous elasticity, given basic material properties (Izz and Iyy moments of inertia, area, Young modulus, etc.), but also supporting the advanced case of Iyy and Izz axes rotated respect reference, elastic center with offset from centerline reference, and shear center with offset from centerline reference. More...
class	ChBeamSectionEulerAdvancedGeneric
	General purpose section of an Euler-Bernoulli beam in 3D, not assuming homogeneous density or homogeneous elasticity, given basic material properties. More...
class	ChBeamSectionEulerEasyCircular
	A simple specialization of ChBeamSectionEuler if you just need the simplest model for a beam with circular centered section, with uniform elasticity and uniform density. More...
class	ChBeamSectionEulerEasyRectangular
	A simple specialization of ChBeamSectionEuler if you just need the simplest model for a rectangular centered beam, with uniform elasticity and uniform density. More...
class	ChBeamSectionEulerSimple
	Basic section of an Euler-Bernoulli beam in 3D, for a homogeneous density and homogeneous elasticity, given basic material properties (Izz and Iyy moments of inertia, area, Young modulus, etc.). More...
class	ChBeamSectionRayleighAdvancedGeneric
	This works exactly as ChBeamSectionEulerAdvancedGeneric, but adds the effect of Jyy Jzz rotational sectional inertias. More...
class	ChBeamSectionRayleighEasyCircular
	This works exactly as ChBeamSectionEulerEasyCircular, but adds the effect of Jyy Jzz rotational sectional inertias. More...
class	ChBeamSectionRayleighEasyRectangular
	This works exactly as ChBeamSectionEulerEasyRectangular, but adds the effect of Jyy Jzz rotational sectional inertias. More...
class	ChBeamSectionRayleighSimple
	This works exactly as ChBeamSectionEulerSimple, but adds the effect of Jyy Jzz rotational sectional inertias, whereas the conventional Euler theory would assume the mass to be concentrated in the center of mass, hence Jyy Jzz =0. More...
class	ChBeamSectionShape
	Base class for drawing tesselated profiles of beams in 3D views, if needed. More...
class	ChBeamSectionShapeCircular
	A ready-to-use class for drawing properties of circular beams. More...
class	ChBeamSectionShapePolyline
	A class for drawing properties of beams whose section is a set of M polylines, each with N points. More...
class	ChBeamSectionShapeRectangular
	A ready-to-use class for drawing properties of rectangular beams. More...
class	ChBuilderBeamANCF
	Utility class for creating complex beams using ChElementBeamANCF elements, for example subdivides a segment in multiple finite elements. More...
class	ChBuilderBeamEuler
	Utility class for creating complex beams using ChElementBeamEuler elements, for example subdivides a segment in multiple finite elements. More...
class	ChBuilderBeamIGA
	Utility class for creating complex beams using ChElementBeamIGA elements, for example subdivides a segment in multiple finite elements. More...
class	ChBuilderCableANCF
	Utility class for creating complex beams using ChElementCableANCF elements, for example subdivides a segment in multiple finite elements. More...
class	ChContactNodeXYZ
	Proxy to FEA nodes, to grant them the features needed for collision detection. More...
class	ChContactNodeXYZROT
	Proxy to FEA nodes with 3 xyz + 3 rot coords, to grant them the features needed for collision detection. More...
class	ChContactNodeXYZROTsphere
	Proxy to FEA nodes for collisions, with spheres associated to nodes, for point-cloud type of collisions. More...
class	ChContactNodeXYZsphere
	Proxy to FEA nodes for collisions, with spheres associated to nodes, for point-cloud type of collisions. More...
class	ChContactSurface
	Base class for contact surfaces in FEA meshes. More...
class	ChContactSurfaceMesh
	Class which defines a contact surface for FEA elements, using a mesh of triangles. More...
class	ChContactSurfaceNodeCloud
	Class which defines a contact surface for FEA elements, where only xyz nodes in the FEA model are used as contact items for the collision detection. More...
class	ChContactTriangleXYZ
	Contact element of triangular type. More...
class	ChContactTriangleXYZROT
	Contact element of triangular type - version for triangles where the nodes are of ChNodeFEAxyzrot type. More...
class	ChContinuumDruckerPrager
	Class for the basic properties of elastoplastic materials of Drucker-Prager type, that are useful for simulating soils. More...
class	ChContinuumElastic
	Class for the basic properties of materials in an elastic continuum. More...
class	ChContinuumElastoplastic
	Class for all elastic materials that can undergo plastic flow. More...
class	ChContinuumElectrostatics
	Class for material for FEA electrostatic problems. More...
class	ChContinuumMaterial
	Base class for properties of materials in a continuum. More...
class	ChContinuumPlasticVonMises
	Class for the basic properties of materials in an elastoplastic continuum, with strain yield limit based on Von Mises yield. More...
class	ChContinuumPoisson3D
	Class for the basic properties of scalar fields P in 3D FEM problems that can be described by Laplace PDEs of type rho dP/dt + div [C] grad P = 0. More...
class	ChContinuumThermal
	Class for thermal fields, for FEA problems involving temperature, heat, etc. More...
class	ChDampingCosserat
	Base interface for structural damping of beam sections of Cosserat type, where xyz force "n" and xyz torque "m" are a 6-dimensional function of generalized strain speeds, "e'" traction/shear speed and "k'" curvature speed, as: {n,m}=f({e',k'}) Children classes implement this function in different ways. More...
class	ChDampingCosseratLinear
	Simple linear lumped damping of beam sections of Cosserat type, {n,m}=f({e',k'}) where damping is proportional to speed of deformation/curvature via linear constants: More...
class	ChDampingCosseratRayleigh
	Simple Rayleigh damping of beam sections of Cosserat type, where damping is proportional to stiffness via a beta coefficient. More...
class	ChDampingKirchhoff
	Base interface for damping of thin shells (Kirchoff-Love shell theory, without shear effects) to be used in a ChMaterialShellKirchhoff. More...
class	ChDampingKirchhoffRayleigh
	Simple Rayleight damping of a Kirchhoff shell layer, where damping is proportional to stiffness via a beta coefficient. More...
class	ChDampingReissner
	Base interface for damping of 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al.) to be used in a ChMaterialShellReissner. More...
class	ChDampingReissnerRayleigh
	Simple Rayleight damping of a Reissner-mindlin shell, where damping is proportional to stiffness via a beta coefficient. More...
class	ChElasticityCosserat
	Base interface for elasticity of beam sections of Cosserat type, where xyz force "n" and xyz torque "m" are a 6-dimensional function of generalized strains, "e" traction/shear and "k" curvatures, as: {n,m}=f({e,k}) There are various children classes that implement this function in different ways. More...
class	ChElasticityCosseratAdvanced
	Advanced linear elasticity for a Cosserat beam. More...
class	ChElasticityCosseratAdvancedGeneric
	Advanced linear elasticity for a Cosserat section, not assuming homogeneous elasticity. More...
class	ChElasticityCosseratGeneric
	Generic linear elasticity for a Cosserat beam using directly a 6x6 matrix [E] as user-input data. More...
class	ChElasticityCosseratMesh
	Elasticity for a beam section in 3D, where the section is defined by a mesh of triangles. More...
class	ChElasticityCosseratSimple
	Simple linear elasticity model for a Cosserat beam, using basic material properties (zz and yy moments of inertia, area, Young modulus, etc.). More...
class	ChElasticityKirchhoff
	Base interface for elasticity of thin shells (Kirchoff-Love shell theory, without shear effects) to be used in a ChMaterialShellKirchhoff. More...
class	ChElasticityKirchhoffGeneric
	Generic linear elasticity for thin shells (Kirchoff-Love shell theory, without shear effects) to be used in a ChMaterialShellKirchhoff. More...
class	ChElasticityKirchhoffIsothropic
	Isothropic elasticity for thin shells (Kirchoff-Love shell theory, without shear effects) to be used in a ChMaterialShellKirchhoff. More...
class	ChElasticityKirchhoffOrthotropic
	Orthotropic elasticity for thin shells (Kirchoff-Love shell theory, without shear effects) to be used in a ChMaterialShellKirchhoff. More...
class	ChElasticityReissner
	Base interface for elasticity of 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al.) to be used in a ChMaterialShellReissner. More...
class	ChElasticityReissnerGeneric
	Generic linear elasticity for 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al.) to be used in a ChMaterialShellReissner. More...
class	ChElasticityReissnerIsothropic
	Elasticity of 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al.) to be used in a ChMaterialShellReissner. More...
class	ChElasticityReissnerOrthotropic
	Elasticity of 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al.) to be used in a ChMaterialShellReissner. More...
class	ChElementBar
	Simple finite element with two nodes and a bar that connects them. More...
class	ChElementBase
	Base class for all finite elements, that can be used in the ChMesh physics item. More...
class	ChElementBeam
	Base class for most structural elements of 'beam' type. More...
class	ChElementBeamANCF
	ANCF beam element with 3 nodes. More...
class	ChElementBeamEuler
	Simple beam element with two nodes and Euler-Bernoulli formulation. More...
class	ChElementBeamIGA
	Isogeometric formulation (IGA) of a Cosserat rod, with large displacements, based on the Geometrically Exact Beam Theory. More...
class	ChElementBrick
	Brick element with 8 nodes (with EAS). More...
class	ChElementBrick_9
	Brick element with 9 nodes. More...
class	ChElementCableANCF
	Simple beam element with two nodes and ANCF gradient-deficient formulation. More...
class	ChElementCorotational
	Class for corotational elements (elements with rotation matrices that follow the global motion of the element) More...
class	ChElementGeneric
	Class for all elements whose stiffness matrix can be seen as a NxN block-matrix to be splitted between N nodes. More...
class	ChElementHexa_20
	Class for FEA elements of hexahedron type (isoparametric 3D bricks) with 20 nodes. More...
class	ChElementHexa_8
	Class for FEA elements of hexahedron type (isoparametric 3D bricks) with 8 nodes. More...
class	ChElementHexahedron
	Class for hexahedral elements. More...
class	ChElementShell
	Base class for most structural elements of 'shell' type. More...
class	ChElementShellANCF
	ANCF laminated shell element with four nodes. More...
class	ChElementShellANCF_8
	ANCF laminated shell element with eight nodes. More...
class	ChElementShellBST
	A Kirchhoff-Love thin shell element of triangular shape. More...
class	ChElementShellReissner4
	Laminated thick shell with geometrically exact kinematics, with 4 nodes. More...
class	ChElementSpring
	Simple finite element with two nodes and a spring/damper between the two nodes. More...
class	ChElementTetra_10
	Tetrahedron FEA element with 10 nodes. More...
class	ChElementTetra_4
	Tetrahedron FEA element with 4 nodes. More...
class	ChElementTetra_4_P
	Tetrahedron FEM element with 4 nodes for scalar fields (for Poisson-like problems). More...
class	ChElementTetrahedron
	Class for tetrahedral elements. More...
class	ChExtruderBeamEuler
	Class for an object that continuously extrude a beam (composed of ChElementBeamEuler elements) with prescribed velocity. More...
class	ChExtruderBeamIGA
	Class for an object that continuously extrude a beam (composed of ChElementBeamIGA elements) with prescribed velocity. More...
class	ChFaceBrick_9
	Face of a linear ChElementBrick_9 tetrahedron. More...
class	ChFaceHexa_8
	Face of a linear ChElementHexa_8 hexahedron. More...
class	ChFaceTetra_4
	Face of a linear ChElementTetra_4 tetrahedron. More...
class	ChGaussIntegrationRule
	Class for the management of the Gauss Quadrature in 1D, 2D or 3D space. More...
class	ChGaussPoint
	Class for a Gauss point, that has a position (1D-3D) and a weight. More...
class	ChInertiaCosserat
	Base class for ineri tal properties (mass, moment of inertia) of beam sections of Cosserat type. More...
class	ChInertiaCosseratAdvanced
	Inertia properties of a beam of Cosserat type, not necessarily of uniform density, from the following information that allows the center of mass to be offset respect to the beam centerline: More...
class	ChInertiaCosseratMassref
	Inertia properties of a beam of Cosserat type, not necessarily of uniform density, from the following information that allows the center of mass to be offset respect to the beam centerline: More...
class	ChInertiaCosseratSimple
	Inertia properties of a beam of Cosserat type, defined from an uniform density [kg/m^3], and the following geometric information: More...
class	ChInternalDataLumpedCosserat
	Internal variables for basic lumped plasticity in Cosserat beams. More...
class	ChLinkBeamIGAslider
	Class for allowin an IGA beam to slide inside a 'outlet' represented by the x axis of a coordinate system floating with a ChBodyFrame. More...
class	ChLinkDirFrame
	Class for creating a constraint between the direction of a FEA node of ChNodeFEAxyzD class, and a ChBodyFrame (frame). More...
class	ChLinkPointFrame
	Class for creating a constraint between an FEA node of ChNodeFEAxyz type and a ChBodyFrame (frame) object. More...
class	ChLinkPointFrameGeneric
	Class for creating a constraint between an FEA node of ChNodeFEAxyz type and a ChBodyFrame (frame) object. More...
class	ChLinkPointPoint
	Class for creating a constraint between two xyz FEA nodes (points). More...
class	ChLinkPointTriface
	Class for creating a constraint between a xyz FEA node (point) and a triangular face given by three xyz FEA nodes, with linear shape function (ex. More...
class	ChLinkPointTrifaceRot
	Class for creating a constraint between a xyz FEA node (point) and a triangular face given by three xyzrot FEA nodes, with linear shape function (ex. More...
class	ChLoadBeamWrench
	Atomic wrench (ready to use load) Load for a wrench (force+torque) at a specific position of a beam. More...
class	ChLoadBeamWrenchDistributed
	Distributed constant wrench (ready to use load) Load for a wrench (force+torque) at a specific position of a beam. More...
class	ChLoadContactSurfaceMesh
	Class for applying loads to a contact mesh as a cluster of forces operating on the nodes of the underlying finite elements. More...
class	ChLoaderBeamWrench
	Atomic wrench. More...
class	ChLoaderBeamWrenchDistributed
	Distributed constant wrench. More...
class	ChMaterialBeamANCF
	Material definition. More...
class	ChMaterialShellANCF
	Definition of materials to be used for ANCF shells. More...
class	ChMaterialShellKirchhoff
	Material for a single layer of a thin shell (Kirchoff-Love shell theory, i.e. More...
class	ChMaterialShellReissner
	Material for a single layer of a 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al). More...
class	ChMaterialShellReissnerIsothropic
	For backward compatibility only! New approach: create a ChElasticityReissnerOrthotropic and create a ChMaterialShellReissner by passing the elasticity as a parameter. More...
class	ChMaterialShellReissnerOrthotropic
	For backward compatibility only! New approach: create a ChElasticityReissnerOrthotropic and create a ChMaterialShellReissner by passing the elasticity as a parameter. More...
class	ChMatrixCorotation
	Perform a corotation (warping) of a K matrix by pre- or post- multiplying it with a C matrix that has 3x3 rotation matrices R as diagonal blocks, so that C*K means: More...
class	ChMatterMeshless
	Class for clusters of nodes that can simulate a visco-elasto-plastic deformable solid using the approach in Mueller ("Point based.." 2004 paper), that is with a 'meshless' FEA approach. More...
class	ChMesh
	Class which defines a mesh of finite elements of class ChElementBase, between nodes of class ChNodeFEAbase. More...
class	ChMeshExporter
	Collection of mesh file writer utilities. More...
class	ChMeshFileLoader
	Collection of mesh file loader utilities. More...
class	ChMeshSurface
	Class which defines a surface for a mesh FEA elements. More...
class	ChNodeFEAbase
	Base class for a generic finite element node that can be stored in ChMesh containers. More...
class	ChNodeFEAcurv
	Generic finite element node with 9 degrees of freedom representing curvature. More...
class	ChNodeFEAxyz
	Class for a generic 3D finite element node, with x,y,z displacement. More...
class	ChNodeFEAxyzD
	Class for a generic 3D finite element node, with x,y,z displacement and a direction. More...
class	ChNodeFEAxyzDD
	Class for a generic 3D finite element node, with x,y,z displacement, direction, and one curvature vector OR additional direction. More...
class	ChNodeFEAxyzP
	Class for a generic finite element node in 3D space, with scalar field P. More...
class	ChNodeFEAxyzrot
	Class for a generic ED finite element node, with x,y,z displacement and a 3D rotation. More...
class	ChNodeMeshless
	Class for a single node in the meshless FEA cluster. More...
class	ChPlasticityCosserat
	Base class for plasticity of beam sections of Cosserat type. More...
class	ChPlasticityCosseratLumped
	Lumped plasticity of Cosserat-type beams. More...
class	ChPlasticityKirchhoff
	Base interface for plasticity of thin shells (Kirchoff-Love shell theory, without shear effects) to be used in a ChMaterialShellKirchhoff. More...
class	ChPlasticityReissner
	Base interface for plasticity of 6-field Reissner-Mindlin shells (kinematically-exact shell theory as in Witkowski et al.) to be used in a ChMaterialShellReissner. More...
class	ChPolarDecomposition
	Perform a polar decomposition of a 3x3 P matrix in order to retrieve the orthogonal Q and the symmetric S form, as P=Q*S. More...
class	ChShellKirchhoffInternalData
	Base class for internal variables of Kirchhoff thin shells materials. More...
class	ChShellReissnerInternalData
	Base class for internal variables of Reissner shells materials. More...
class	ChTriangleOfXYZnodes
	Utility class for using the ChLinkPointTriface constraint. More...
class	ChTriangleOfXYZROTnodes
	Utility class for using the ChLinkPointTriface constraint. More...
class	ChVisualizationFEAmesh
	Class for a FEA mesh visualization. More...
class	PolarDecomposition
	Polar decomposition of a general 3x3 matrix. More...

Typedefs
using	ChInertiaCosseratUniformDensity = ChInertiaCosseratSimple
using	ChBeamSectionBasic = ChBeamSectionEulerSimple
using	ChBeamSectionAdvanced = ChBeamSectionEulerAdvanced
typedef double(*	LI_Type) (const double xi[2])
typedef double(*	LI_J_Type) (const double xi[2])

Functions
int	mysgn (double val)
template<int N>
bool	LU_factor (ChMatrixNM< double, N, N > &A, ChMatrixNM< int, N, 1 > &INDX, bool &pivoting)
	In-place LU factorization. More...
template<int N>
void	LU_solve (const ChMatrixNM< double, N, N > &A, const ChMatrixNM< int, N, 1 > &INDX, ChMatrixNM< double, N, 1 > &B)
	LU linear system solution (back substitution) More...
ChVector< float > &	FetchOrAllocate (std::vector< ChVector< float >> &mvector, unsigned int &id)
void	TriangleNormalsReset (std::vector< ChVector<>> &normals, std::vector< int > &accumul)
void	TriangleNormalsCompute (ChVector< int > norm_indexes, ChVector< int > vert_indexes, std::vector< ChVector<>> &vertexes, std::vector< ChVector<>> &normals, std::vector< int > &accumul)
void	TriangleNormalsSmooth (std::vector< ChVector<>> &normals, std::vector< int > &accumul)