SpecialCosseratRodModel Class Reference

Special Cosserat rod finite element model with geometrically exact kinematics. More...

#include "SpecialCosseratRodModel.h"

Inheritance diagram for SpecialCosseratRodModel:

Collaboration diagram for SpecialCosseratRodModel:

Public Member Functions
	SpecialCosseratRodModel (const String &name, const Properties &conf, const Properties &props, const Properties &globdat)
	Constructor.
virtual bool	takeAction (const String &action, const Properties &params, const Properties &globdat) override
	Handle model actions.

Static Public Member Functions
static Ref< Model >	makeNew (const String &name, const Properties &conf, const Properties &props, const Properties &globdat)
	Create new SpecialCosseratRodModel instance.
static void	declare ()
	Declare model type to factory.

Static Public Attributes
Property identifiers
static const char *	TYPE_NAME = "specialCosseratRod"
	Model type name.
static const char *	TRANS_DOF_DEFAULT = "trans_"
	Default translational DOF prefix.
static const char *	ROT_DOF_DEFAULT = "rot_"
	Default rotational DOF prefix.
static const char *	TRANS_DOF_NAMES = "dofNamesTrans"
	Translational DOF names property.
static const char *	ROT_DOF_NAMES = "dofNamesRot"
	Rotational DOF names property.
static const char *	SYMMETRIC_ONLY = "symmetric_tanget_stiffness"
	Symmetric tangent stiffness property.
static const char *	MATERIAL_Y_DIR = "material_ey"
	Material y-direction property.
static const char *	GIVEN_NODES = "given_dir_nodes"
	Given direction nodes property.
static const char *	GIVEN_DIRS = "given_dir_dirs"
	Given directions property.
static const char *	LUMPED_MASS = "lumpedMass"
	Lumped mass property.
static const char *	HINGES = "hinges"
	Hinges property.
DOF constants
static const idx_t	TRANS_DOF_COUNT = 3
	Number of translational DOFs.
static const idx_t	ROT_DOF_COUNT = 3
	Number of rotational DOFs.
static const Slice	TRANS_PART = jem::SliceFromTo(0, TRANS_DOF_COUNT)
	Translational DOF slice.
static const Slice	ROT_PART = jem::SliceFromTo(TRANS_DOF_COUNT, TRANS_DOF_COUNT + ROT_DOF_COUNT)
	Rotational DOF slice.

Detailed Description

The SpecialCosseratRodModel implements a geometrically exact rod formulation based on the Cosserat theory (Simo-Reissner rod). It features 6 DOF per node (3 translational + 3 rotational) and supports large deformations, rotations, and complex material behavior including plasticity.

Features:

• Geometrically exact rod kinematics with 6 DOF per node
• Large deformation and rotation capabilities
• Material integration with plasticity support
• Hinge connection modeling
• Gyroscopic effects for dynamic analysis
• Initial strain and rotation specification
• Energy calculation (potential and dissipated)
• Strain and stress output tables

See also

Reissner (1981)

Simo, Vu-Quoc (1986)

Crisfield, Jelenić (1999)

Antman (2005)

Eugster (2015)

Constructor & Destructor Documentation

SpecialCosseratRodModel()

SpecialCosseratRodModel::SpecialCosseratRodModel ( const String &  name, const Properties &  conf, const Properties &  props, const Properties &  globdat  )

explicit

Parameters

name	Model name
conf	Actually used configuration properties (output)
props	User-specified model properties
globdat	Global data container

Member Function Documentation

declare()

void SpecialCosseratRodModel::declare ( )

static

makeNew()

Ref< Model > SpecialCosseratRodModel::makeNew ( const String &  name, const Properties &  conf, const Properties &  props, const Properties &  globdat  )

static

Parameters

name	Model name
conf	Actually used configuration properties (output)
props	User-specified model properties
globdat	Global data container

Returns

New model instance

takeAction()

bool SpecialCosseratRodModel::takeAction ( const String &  action, const Properties &  params, const Properties &  globdat  )

overridevirtual

Parameters

action	Action name
params	Action parameters
globdat	Global data container

Returns

true if action was handled

Member Data Documentation

GIVEN_DIRS

const char * SpecialCosseratRodModel::GIVEN_DIRS = "given_dir_dirs"

static

GIVEN_NODES

const char * SpecialCosseratRodModel::GIVEN_NODES = "given_dir_nodes"

static

HINGES

const char * SpecialCosseratRodModel::HINGES = "hinges"

static

LUMPED_MASS

const char * SpecialCosseratRodModel::LUMPED_MASS = "lumpedMass"

static

MATERIAL_Y_DIR

const char * SpecialCosseratRodModel::MATERIAL_Y_DIR = "material_ey"

static

ROT_DOF_COUNT

const idx_t SpecialCosseratRodModel::ROT_DOF_COUNT = 3

static

ROT_DOF_DEFAULT

const char * SpecialCosseratRodModel::ROT_DOF_DEFAULT = "rot_"

static

ROT_DOF_NAMES

const char * SpecialCosseratRodModel::ROT_DOF_NAMES = "dofNamesRot"

static

ROT_PART

const Slice SpecialCosseratRodModel::ROT_PART = jem::SliceFromTo(TRANS_DOF_COUNT, TRANS_DOF_COUNT + ROT_DOF_COUNT)

static

SYMMETRIC_ONLY

const char * SpecialCosseratRodModel::SYMMETRIC_ONLY = "symmetric_tanget_stiffness"

static

TRANS_DOF_COUNT

const idx_t SpecialCosseratRodModel::TRANS_DOF_COUNT = 3

static

TRANS_DOF_DEFAULT

const char * SpecialCosseratRodModel::TRANS_DOF_DEFAULT = "trans_"

static

TRANS_DOF_NAMES

const char * SpecialCosseratRodModel::TRANS_DOF_NAMES = "dofNamesTrans"

static

TRANS_PART

const Slice SpecialCosseratRodModel::TRANS_PART = jem::SliceFromTo(0, TRANS_DOF_COUNT)

static

TYPE_NAME

const char * SpecialCosseratRodModel::TYPE_NAME = "specialCosseratRod"

static