Description

Material data for a collision surface for use with smooth (penalty) contact method.

#include <ChMaterialSurfaceSMC.h>

Inheritance diagram for chrono::ChMaterialSurfaceSMC:

Collaboration diagram for chrono::ChMaterialSurfaceSMC:

Public Member Functions
	ChMaterialSurfaceSMC (const ChMaterialSurfaceSMC &other)

virtual ChMaterialSurfaceSMC *	Clone () const override
	"Virtual" copy constructor (covariant return type).

virtual ChContactMethod	GetContactMethod () const override

void	SetYoungModulus (float val)
	Young's modulus.

float	GetYoungModulus () const

void	SetPoissonRatio (float val)

float	GetPoissonRatio () const

void	SetAdhesion (float val)
	Constant cohesion force.

float	GetAdhesion () const

void	SetAdhesionMultDMT (float val)
	Adhesion multiplier in the Derjaguin-Muller-Toporov model. More...

float	GetAdhesionMultDMT () const

void	SetAdhesionSPerko (float val)
	Coefficient for Perko adhesion model. More...

float	GetAdhesionSPerko () const

void	SetKn (float val)
	Stiffness and damping coefficients.

void	SetKt (float val)

void	SetGn (float val)

void	SetGt (float val)

float	GetKn () const

float	GetKt () const

float	GetGn () const

float	GetGt () const

virtual void	StreamOUT (ChStreamOutAscii &mstream)
	Method to allow serialization transient data into ASCII.

virtual void	ArchiveOUT (ChArchiveOut &marchive) override
	Method to allow serialization of transient data to archives.

virtual void	ArchiveIN (ChArchiveIn &marchive) override
	Method to allow deserialization of transient data from archives.

Public Member Functions inherited from chrono::ChMaterialSurface
void	SetSfriction (float val)
	Static sliding friction coefficient. More...

float	GetSfriction () const

void	SetKfriction (float val)
	Kinetic sliding friction coefficient.

float	GetKfriction () const

void	SetFriction (float val)
	Set both static friction and kinetic friction at once, with same value.

void	SetRollingFriction (float val)
	Rolling friction coefficient. Usually around 1E-3. Default 0.

float	GetRollingFriction () const

void	SetSpinningFriction (float val)
	Spinning friction coefficient. Usually around 1E-3. Default 0.

float	GetSpinningFriction () const

void	SetRestitution (float val)
	Normal coefficient of restitution. In the range [0,1]. Default 0.

float	GetRestitution () const

Public Attributes
float	young_modulus
	Young's modulus (elastic modulus)

float	poisson_ratio
	Poisson ratio.

float	constant_adhesion
	Constant adhesion force, when constant adhesion model is used.

float	adhesionMultDMT
	Adhesion multiplier used in DMT model.

float	adhesionSPerko
	Adhesion multiplier used in Perko model.

float	kn
	user-specified normal stiffness coefficient

float	kt
	user-specified tangential stiffness coefficient

float	gn
	user-specified normal damping coefficient

float	gt
	user-specified tangential damping coefficient

Public Attributes inherited from chrono::ChMaterialSurface
float	static_friction
	Static coefficient of friction.

float	sliding_friction
	Kinetic coefficient of friction.

float	rolling_friction
	Rolling coefficient of friction.

float	spinning_friction
	Spinning coefficient of friction.

float	restitution
	Coefficient of restitution.

Additional Inherited Members
Static Public Member Functions inherited from chrono::ChMaterialSurface
static std::shared_ptr< ChMaterialSurface >	DefaultMaterial (ChContactMethod contact_method)
	Construct and return a contact material of the specified type with default properties.

Protected Member Functions inherited from chrono::ChMaterialSurface
	ChMaterialSurface (const ChMaterialSurface &other)

Member Function Documentation

◆ SetAdhesionMultDMT()

void chrono::ChMaterialSurfaceSMC::SetAdhesionMultDMT ( float val )

inline

Adhesion multiplier in the Derjaguin-Muller-Toporov model.

In this model,
   adhesion = adhesionMultDMT * sqrt(R_eff)
given the surface energy, w,
   adhesionMultDMT = 2 * CH_C_PI * w * sqrt(R_eff)
given the equilibrium penetration distance, y_eq,
   adhesionMultDMT = 4.0 / 3.0 * E_eff * powf(y_eq, 1.5)

◆ SetAdhesionSPerko()

void chrono::ChMaterialSurfaceSMC::SetAdhesionSPerko ( float val )

inline

Coefficient for Perko adhesion model.

In this model (see Perko et al., 2001),
   adhesion = adhesionSPerko * R
The coefficient adhesionSPerko is function of the Hamaker constant A and a measure of cleanliness S.
For lunar regolith, 
   adhesionSPerko = 3.6e-2 * S^2

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

/builds/uwsbel/chrono/src/chrono/physics/ChMaterialSurfaceSMC.h
/builds/uwsbel/chrono/src/chrono/physics/ChMaterialSurfaceSMC.cpp

Description

Public Member Functions

Public Attributes

Additional Inherited Members

Member Function Documentation

◆ SetAdhesionMultDMT()

◆ SetAdhesionSPerko()