Description

Geometry for a beam section in 3D, along with basic material properties.

It also supports the advanced case of Iyy and Izz axes rotated respect reference, centroid with offset from reference, and shear center with offset from reference. This material can be shared between multiple beams.

#include <ChBeamSection.h>

Inheritance diagram for chrono::fea::ChBeamSectionAdvanced:

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Collaboration diagram for chrono::fea::ChBeamSectionAdvanced:

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Public Member Functions
void	SetSectionRotation (double ma)
	Set the rotation of the section for which the Iyy Izz are defined.

double	GetSectionRotation ()

void	SetCentroid (double my, double mz)
	Set the displacement of the centroid C (i.e. More...

double	GetCentroidY ()

double	GetCentroidZ ()

void	SetShearCenter (double my, double mz)
	Set the displacement of the shear center S with respect to the reference beam line. More...

double	GetShearCenterY ()

double	GetShearCenterZ ()

Public Member Functions inherited from chrono::fea::ChBeamSectionBasic
void	SetArea (const double ma)
	Set the cross sectional area A of the beam (m^2)

double	GetArea () const

void	SetIyy (double ma)
	Set the Iyy moment of inertia of the beam (for flexion about y axis) Note: some textbook calls this Iyy as Iz.

double	GetIyy () const

void	SetIzz (double ma)
	Set the Izz moment of inertia of the beam (for flexion about z axis) Note: some textbook calls this Izz as Iy.

double	GetIzz () const

void	SetJ (double ma)
	Set the J torsion constant of the beam (for torsion about x axis)

double	GetJ () const

void	SetKsy (double ma)
	Set the Timoshenko shear coefficient Ks for y shear, usually about 0.8, (for elements that use this, ex. More...

double	GetKsy () const

void	SetKsz (double ma)
	Set the Timoshenko shear coefficient Ks for z shear, usually about 0.8, (for elements that use this, ex. More...

double	GetKsz () const

void	SetAsRectangularSection (double width_y, double width_z)
	Shortcut: set Area, Ixx, Iyy, Ksy, Ksz and J torsion constant at once, given the y and z widths of the beam assumed with rectangular shape.

void	SetAsCircularSection (double diameter)
	Shortcut: set Area, Ixx, Iyy, Ksy, Ksz and J torsion constant at once, given the diameter of the beam assumed with circular shape.

void	SetDensity (double md)
	Set the density of the beam (kg/m^3)

double	GetDensity () const

void	SetYoungModulus (double mE)
	Set E, the Young elastic modulus (N/m^2)

double	GetYoungModulus () const

void	SetGshearModulus (double mG)
	Set G, the shear modulus.

double	GetGshearModulus () const

void	SetGwithPoissonRatio (double mpoisson)
	Set G, the shear modulus, given current E and the specified Poisson ratio.

void	SetBeamRaleyghDamping (double mr)
	Set the Rayleigh damping ratio r (as in: R = r * K ), to do: also mass-proportional term.

double	GetBeamRaleyghDamping ()

Public Member Functions inherited from chrono::fea::ChBeamSection
void	SetDrawShape (std::shared_ptr< ChBeamSectionShape > mshape)
	Set the graphical representation for this section. More...

std::shared_ptr< ChBeamSectionShape >	GetDrawShape () const
	Get the drawing shape of this section (i.e.a 2D profile used for drawing 3D tesselation and visualization) By default a thin square section, use SetDrawShape() to change it.

void	SetDrawThickness (double thickness_y, double thickness_z)
	Shortcut: adds a ChBeamSectionShapeRectangular for visualization as a centered rectangular beam, and sets its width/height. More...

void	SetDrawCircularRadius (double draw_rad)
	Shortcut: adds a ChBeamSectionShapeCircular for visualization as a centered circular beam, and sets its radius. More...

void	SetCircular (bool ic)
	OBSOLETE only for backward compability More...

Public Attributes
double	alpha

double	Cy

double	Cz

double	Sy

double	Sz

Public Attributes inherited from chrono::fea::ChBeamSectionBasic
double	Area

double	Iyy

double	Izz

double	J

double	G

double	E

double	density

double	rdamping

double	Ks_y

double	Ks_z

Member Function Documentation

◆ SetCentroid()

void chrono::fea::ChBeamSectionAdvanced::SetCentroid	(	double	my,
		double	mz
	)

inline

Set the displacement of the centroid C (i.e.

the elastic center, or tension center) with respect to the reference beam line.

◆ SetShearCenter()

void chrono::fea::ChBeamSectionAdvanced::SetShearCenter	(	double	my,
		double	mz
	)

inline

Set the displacement of the shear center S with respect to the reference beam line.

For shapes like rectangles, rotated rectangles, etc., it corresponds to the centroid C, but for "L" shaped or "U" shaped beams this is not always true, and the shear center accounts for torsion effects when a shear force is applied.

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

/builds/uwsbel/chrono/src/chrono/fea/ChBeamSection.h

Description

Public Member Functions

Public Attributes

Member Function Documentation

◆ SetCentroid()

◆ SetShearCenter()