MindlinRollingTorsionSpecies Class Reference

MindlinRollingTorsionSpecies contains the parameters used to describe sliding, rolling and torsional friction. More...

#include <MindlinRollingTorsionSpecies.h>

Inheritance diagram for MindlinRollingTorsionSpecies:

Public Types
typedef MindlinRollingTorsionInteraction	InteractionType
	The correct Interaction type for this FrictionForceSpecies. More...
Public Types inherited from MindlinSpecies
typedef MindlinInteraction	InteractionType
	The correct Interaction type for this FrictionForceSpecies. More...

Public Member Functions
	MindlinRollingTorsionSpecies ()
	The default constructor. More...
	MindlinRollingTorsionSpecies (const MindlinRollingTorsionSpecies &s)
	The default copy constructor. More...
virtual	~MindlinRollingTorsionSpecies ()
	The default destructor. More...
void	read (std::istream &is) override
	Reads the species properties from an input stream. More...
void	write (std::ostream &os) const override
	Writes the species properties to an output stream. More...
std::string	getBaseName () const override
	Used in Species::getName to obtain a unique name for each Species. More...
bool	getUseAngularDOFs () const override
	Returns true if torques have to be calculated. More...
void	mix (MindlinRollingTorsionSpecies *const S, MindlinRollingTorsionSpecies *const T)
	creates default values for mixed species More...
void	setRollingDissipation (Mdouble new_dispt)
	Allows the spring constant to be changed. More...
Mdouble	getRollingDissipation () const
	Allows the tangential viscosity to be accessed. More...
void	setRollingFrictionCoefficient (Mdouble new_mu)
	Allows the (dynamic) Coulomb friction coefficient to be changed; also sets mu_s by default. More...
Mdouble	getRollingFrictionCoefficient () const
	Allows the (dynamic) Coulomb friction coefficient to be accessed. More...
void	setRollingFrictionCoefficientStatic (Mdouble new_mu)
	Allows the static Coulomb rolling friction coefficient to be changed. More...
Mdouble	getRollingFrictionCoefficientStatic () const
	Allows the static Coulomb rolling friction coefficient to be accessed. More...
void	setTorsionDissipation (Mdouble new_dispt)
	Allows the torsion viscosity to be changed. More...
Mdouble	getTorsionDissipation () const
	Allows the torsion viscosity to be accessed. More...
void	setTorsionFrictionCoefficient (Mdouble new_mu)
	Allows the (dynamic) Coulomb torsion friction coefficient to be changed; also sets mu_s by default. More...
Mdouble	getTorsionFrictionCoefficient () const
	Allows the (dynamic) Coulomb torsion friction coefficient to be accessed. More...
void	setTorsionFrictionCoefficientStatic (Mdouble new_mu)
	Allows the static Coulomb torsion friction coefficient to be accessed. More...
Mdouble	getTorsionFrictionCoefficientStatic () const
	Allows the static Coulomb torsion friction coefficient to be accessed. More...
Public Member Functions inherited from MindlinSpecies
	MindlinSpecies ()
	The default constructor. More...
	MindlinSpecies (const MindlinSpecies &s)
	The default copy constructor. More...
virtual	~MindlinSpecies ()
	The default destructor. More...
void	read (std::istream &is) override
	Reads the species properties from an input stream. More...
void	write (std::ostream &os) const override
	Writes the species properties to an output stream. More...
void	setSlidingDissipation (Mdouble new_dispt)
	Allows the tangential viscosity to be changed. More...
Mdouble	getSlidingDissipation () const
	Allows the tangential viscosity to be accessed. More...
void	setSlidingFrictionCoefficient (Mdouble new_mu)
	Allows the (dynamic) Coulomb friction coefficient to be changed; also sets mu_s by default. More...
void	setShearModulus (Mdouble new_G)
Mdouble	getShearModulus () const
Mdouble	getSlidingFrictionCoefficient () const
	Allows the (dynamic) Coulomb friction coefficient to be accessed. More...
void	setSlidingFrictionCoefficientStatic (Mdouble new_mu)
	Allows the static Coulomb friction coefficient to be changed. More...
Mdouble	getSlidingFrictionCoefficientStatic () const
	Allows the static Coulomb friction coefficient to be accessed. More...
bool	getUseAngularDOFs () const override
	Returns true if torques have to be calculated. More...
void	mix (MindlinSpecies *const S, MindlinSpecies *const T)
	creates default values for mixed species More...
Public Member Functions inherited from BaseSpecies
	BaseSpecies ()
	The default constructor. More...
	BaseSpecies (const BaseSpecies &p)
	The copy constructor. More...
virtual	~BaseSpecies ()
	The default destructor. More...
virtual BaseSpecies *	copy () const =0
	Creates a deep copy of the object from which it is called. More...
void	setHandler (SpeciesHandler *handler)
	Sets the pointer to the handler to which this species belongs. More...
SpeciesHandler *	getHandler () const
	Returns the pointer to the handler to which this species belongs. More...
Mdouble	average (Mdouble a, Mdouble b)
	defines the average of two variables by the harmonic mean. More...
virtual void	mixAll (BaseSpecies *const S, BaseSpecies *const T)=0
	creates default values for mixed species More...
virtual Mdouble	getInteractionDistance () const =0
	returns the largest separation distance at which adhesive short-range forces can occur. More...
virtual BaseInteraction *	getNewInteraction (BaseInteractable *P, BaseInteractable *I, Mdouble timeStamp) const =0
	returns new Interaction object. More...
Public Member Functions inherited from BaseObject
	BaseObject ()
	Default constructor. More...
	BaseObject (const BaseObject &p)
	Copy constructor, copies all the objects BaseObject contains. More...
virtual	~BaseObject ()
	virtual destructor More...
virtual std::string	getName () const =0
	A purely virtual function. More...
virtual void	moveInHandler (const unsigned int index)
	Except that it is virtual, it does the same thing as setIndex() does. More...
void	setIndex (const unsigned int index)
	Allows one to assign an index to an object in the handler/container. More...
void	setId (const unsigned int id)
	Assigns a unique identifier to each object in the handler (container) which remains constant even after the object is deleted from the container/handler. More...
unsigned int	getIndex () const
	Returns the index of the object in the handler. More...
unsigned int	getId () const
	Returns the unique identifier of any particular object. More...

Private Attributes
Mdouble	rollingStiffness_
	rolling stiffness. More...
Mdouble	rollingDissipation_
	rolling dissipation coefficient. More...
Mdouble	rollingFrictionCoefficient_
	(dynamic) Coulomb rolling friction coefficient. More...
Mdouble	rollingFrictionCoefficientStatic_
	static Coulomb rolling friction coefficient (by default set equal to the dynamic one). More...
Mdouble	torsionStiffness_
	rolling stiffness. More...
Mdouble	torsionDissipation_
	rolling dissipation coefficient. More...
Mdouble	torsionFrictionCoefficient_
	(dynamic) Coulomb torsion friction coefficient. More...
Mdouble	torsionFrictionCoefficientStatic_
	static Coulomb torsion friction coefficient (by default set equal to the dynamic one). More...

Detailed Description

MindlinRollingTorsionSpecies contains the parameters used to describe sliding, rolling and torsional friction.

See FrictionInteraction::computeForce for a description of the force law.

Todo:

TW: should this class be renamed SlidingRollingTorsionMindlinRollingTorsionSpecies?

Definition at line 37 of file MindlinRollingTorsionSpecies.h.

Member Typedef Documentation

typedef MindlinRollingTorsionInteraction MindlinRollingTorsionSpecies::InteractionType

The correct Interaction type for this FrictionForceSpecies.

Definition at line 41 of file MindlinRollingTorsionSpecies.h.

Constructor & Destructor Documentation

MindlinRollingTorsionSpecies::MindlinRollingTorsionSpecies

(

)

The default constructor.

Definition at line 33 of file MindlinRollingTorsionSpecies.cc.

References rollingDissipation_, rollingFrictionCoefficient_, rollingFrictionCoefficientStatic_, rollingStiffness_, torsionDissipation_, torsionFrictionCoefficient_, torsionFrictionCoefficientStatic_, and torsionStiffness_.

    : MindlinSpecies()
{
    rollingStiffness_=0.0;
    rollingDissipation_=0.0;
    rollingFrictionCoefficient_=0.0;
    rollingFrictionCoefficientStatic_=0.0;
    torsionStiffness_=0.0;
    torsionDissipation_=0.0;
    torsionFrictionCoefficient_=0.0;
    torsionFrictionCoefficientStatic_=0.0;
#ifdef DEBUG_CONSTRUCTOR
    std::cout<<"MindlinRollingTorsionSpecies::MindlinRollingTorsionSpecies() finished"<<std::endl;
#endif
}

MindlinRollingTorsionSpecies::MindlinRollingTorsionSpecies

(

const MindlinRollingTorsionSpecies &

s

)

The default copy constructor.

Parameters

[in]

s

the species that is copied

Definition at line 52 of file MindlinRollingTorsionSpecies.cc.

References rollingDissipation_, rollingFrictionCoefficient_, rollingFrictionCoefficientStatic_, rollingStiffness_, torsionDissipation_, torsionFrictionCoefficient_, torsionFrictionCoefficientStatic_, and torsionStiffness_.

    : MindlinSpecies(s)
{
    rollingStiffness_=s.rollingStiffness_;
    rollingDissipation_=s.rollingDissipation_;
    rollingFrictionCoefficient_=s.rollingFrictionCoefficient_;
    rollingFrictionCoefficientStatic_=s.rollingFrictionCoefficientStatic_;
    torsionStiffness_=s.torsionStiffness_;
    torsionDissipation_=s.torsionDissipation_;
    torsionFrictionCoefficient_=s.torsionFrictionCoefficient_;
    torsionFrictionCoefficientStatic_=s.torsionFrictionCoefficientStatic_;
#ifdef DEBUG_CONSTRUCTOR
    std::cout<<"MindlinRollingTorsionSpecies::MindlinRollingTorsionSpecies(const MindlinRollingTorsionSpecies &p) finished"<<std::endl;
#endif
}

MindlinRollingTorsionSpecies::~MindlinRollingTorsionSpecies ( )

virtual

The default destructor.

Definition at line 68 of file MindlinRollingTorsionSpecies.cc.

{
#ifdef DEBUG_DESTRUCTOR
    std::cout<<"MindlinRollingTorsionSpecies::~MindlinRollingTorsionSpecies() finished"<<std::endl;
#endif   
}

Member Function Documentation

std::string MindlinRollingTorsionSpecies::getBaseName ( ) const

overridevirtual

Used in Species::getName to obtain a unique name for each Species.

Returns

a string containing the name of the species (minus the word "Species")

Reimplemented from MindlinSpecies.

Definition at line 111 of file MindlinRollingTorsionSpecies.cc.

{
    return "Friction";
}

Mdouble MindlinRollingTorsionSpecies::getRollingDissipation

(

)

const

Allows the tangential viscosity to be accessed.

Definition at line 176 of file MindlinRollingTorsionSpecies.cc.

References rollingDissipation_.

Referenced by MindlinRollingTorsionInteraction::computeFrictionForce(), and mix().

{
    return rollingDissipation_;
}

Mdouble MindlinRollingTorsionSpecies::getRollingFrictionCoefficient

(

)

const

Allows the (dynamic) Coulomb friction coefficient to be accessed.

Definition at line 198 of file MindlinRollingTorsionSpecies.cc.

References rollingFrictionCoefficient_.

Referenced by MindlinRollingTorsionInteraction::computeFrictionForce(), and mix().

{
    return rollingFrictionCoefficient_;
}

Mdouble MindlinRollingTorsionSpecies::getRollingFrictionCoefficientStatic

(

)

const

Allows the static Coulomb rolling friction coefficient to be accessed.

Allows the static Coulomb friction coefficient to be accessed.

Definition at line 218 of file MindlinRollingTorsionSpecies.cc.

References rollingFrictionCoefficientStatic_.

Referenced by MindlinRollingTorsionInteraction::computeFrictionForce(), and mix().

{
    return rollingFrictionCoefficientStatic_;
}

Mdouble MindlinRollingTorsionSpecies::getTorsionDissipation

(

)

const

Allows the torsion viscosity to be accessed.

Allows the tangential viscosity to be accessed.

Definition at line 256 of file MindlinRollingTorsionSpecies.cc.

References torsionDissipation_.

Referenced by MindlinRollingTorsionInteraction::computeFrictionForce(), and mix().

{
    return torsionDissipation_;
}

Mdouble MindlinRollingTorsionSpecies::getTorsionFrictionCoefficient

(

)

const

Allows the (dynamic) Coulomb torsion friction coefficient to be accessed.

Allows the (dynamic) Coulomb friction coefficient to be accessed.

Definition at line 278 of file MindlinRollingTorsionSpecies.cc.

References torsionFrictionCoefficient_.

Referenced by MindlinRollingTorsionInteraction::computeFrictionForce(), and mix().

{
    return torsionFrictionCoefficient_;
}

Mdouble MindlinRollingTorsionSpecies::getTorsionFrictionCoefficientStatic

(

)

const

Allows the static Coulomb torsion friction coefficient to be accessed.

Allows the static Coulomb friction coefficient to be accessed.

Definition at line 298 of file MindlinRollingTorsionSpecies.cc.

References torsionFrictionCoefficientStatic_.

Referenced by MindlinRollingTorsionInteraction::computeFrictionForce(), and mix().

{
    return torsionFrictionCoefficientStatic_;
}

bool MindlinRollingTorsionSpecies::getUseAngularDOFs ( ) const

overridevirtual

Returns true if torques have to be calculated.

Returns true for any FrictionForceSpecies except EmptyMindlinRollingTorsionSpecies, because for spherical particles, torques are only caused by tangential forces. See SpeciesHandler::useAngularDOFs for more details

Returns

true

Implements BaseSpecies.

Definition at line 122 of file MindlinRollingTorsionSpecies.cc.

{
    return true;
}

void MindlinRollingTorsionSpecies::mix	(	MindlinRollingTorsionSpecies *const	S,
		MindlinRollingTorsionSpecies *const	T
	)

creates default values for mixed species

For all parameters we assume that the harmonic mean of the parameters of the original two species is a sensible default.

Parameters

[in]

S,T

the two species whose properties are mixed to create the new species

Definition at line 132 of file MindlinRollingTorsionSpecies.cc.

References BaseSpecies::average(), getRollingDissipation(), getRollingFrictionCoefficient(), getRollingFrictionCoefficientStatic(), getTorsionDissipation(), getTorsionFrictionCoefficient(), getTorsionFrictionCoefficientStatic(), rollingDissipation_, rollingFrictionCoefficient_, rollingFrictionCoefficientStatic_, torsionDissipation_, torsionFrictionCoefficient_, and torsionFrictionCoefficientStatic_.

{
    //rollingStiffness_= average(S->getRollingStiffness(), T->getRollingStiffness());
    rollingDissipation_= average(S->getRollingDissipation(), T->getRollingDissipation());
    rollingFrictionCoefficient_= average(S->getRollingFrictionCoefficient(), T->getRollingFrictionCoefficient());
    rollingFrictionCoefficientStatic_= average(S->getRollingFrictionCoefficientStatic(), T->getRollingFrictionCoefficientStatic());
    //torsionStiffness_= average(S->getTorsionStiffness(), T->getTorsionStiffness());
    torsionDissipation_= average(S->getTorsionDissipation(), T->getTorsionDissipation());
    torsionFrictionCoefficient_= average(S->getTorsionFrictionCoefficient(), T->getTorsionFrictionCoefficient());
    torsionFrictionCoefficientStatic_= average(S->getTorsionFrictionCoefficientStatic(), T->getTorsionFrictionCoefficientStatic());
}

void MindlinRollingTorsionSpecies::read ( std::istream &  is )

overridevirtual

Reads the species properties from an input stream.

Parameters

[in]

is

input stream (typically the restart file)

Implements BaseObject.

Definition at line 94 of file MindlinRollingTorsionSpecies.cc.

References MindlinSpecies::read(), rollingDissipation_, rollingFrictionCoefficient_, rollingFrictionCoefficientStatic_, rollingStiffness_, torsionDissipation_, torsionFrictionCoefficient_, torsionFrictionCoefficientStatic_, and torsionStiffness_.

{
    MindlinSpecies::read(is);
    std::string dummy;
    is >> dummy >> rollingStiffness_;
    is >> dummy >> rollingDissipation_;
    is >> dummy >> rollingFrictionCoefficient_;
    is >> dummy >> rollingFrictionCoefficientStatic_;
    is >> dummy >> torsionStiffness_;
    is >> dummy >> torsionDissipation_;
    is >> dummy >> torsionFrictionCoefficient_;
    is >> dummy >> torsionFrictionCoefficientStatic_;
}

void MindlinRollingTorsionSpecies::setRollingDissipation

(

Mdouble

new_dispt

)

Allows the spring constant to be changed.

Allows the tangential viscosity to be changed.

Allows the spring constant to be accessed Allows the tangential viscosity to be changed

Definition at line 165 of file MindlinRollingTorsionSpecies.cc.

References rollingDissipation_.

{
    if (new_dispt >= 0)
        rollingDissipation_ = new_dispt;
    else
    {
        std::cerr << "Error in setRollingDissipation" << std::endl;
        exit(-1);
    }
}

void MindlinRollingTorsionSpecies::setRollingFrictionCoefficient

(

Mdouble

new_mu

)

Allows the (dynamic) Coulomb friction coefficient to be changed; also sets mu_s by default.

Definition at line 183 of file MindlinRollingTorsionSpecies.cc.

References rollingFrictionCoefficient_, and rollingFrictionCoefficientStatic_.

{
    if (new_mu >= 0)
    {
        rollingFrictionCoefficient_ = new_mu;
        rollingFrictionCoefficientStatic_ = rollingFrictionCoefficient_;
    }
    else
    {
        std::cerr << "Error in setSlidingFrictionCoefficient" << std::endl;
        exit(-1);
    }
}

void MindlinRollingTorsionSpecies::setRollingFrictionCoefficientStatic

(

Mdouble

new_mu

)

Allows the static Coulomb rolling friction coefficient to be changed.

Allows the static Coulomb friction coefficient to be changed; also sets mu_s by default.

Definition at line 204 of file MindlinRollingTorsionSpecies.cc.

References rollingFrictionCoefficientStatic_.

{
    if (new_mu >= 0)
    {
        rollingFrictionCoefficientStatic_ = new_mu;
    }
    else
    {
        std::cerr << "Error in setSlidingFrictionCoefficientStatic" << std::endl;
        exit(-1);
    }
}

void MindlinRollingTorsionSpecies::setTorsionDissipation

(

Mdouble

new_dispt

)

Allows the torsion viscosity to be changed.

Allows the tangential viscosity to be changed.

Definition at line 245 of file MindlinRollingTorsionSpecies.cc.

References torsionDissipation_.

{
    if (new_dispt >= 0)
        torsionDissipation_ = new_dispt;
    else
    {
        std::cerr << "Error in setTorsionDissipation" << std::endl;
        exit(-1);
    }
}

void MindlinRollingTorsionSpecies::setTorsionFrictionCoefficient

(

Mdouble

new_mu

)

Allows the (dynamic) Coulomb torsion friction coefficient to be changed; also sets mu_s by default.

Allows the (dynamic) Coulomb friction coefficient to be changed; also sets mu_s by default.

Definition at line 263 of file MindlinRollingTorsionSpecies.cc.

References torsionFrictionCoefficient_, and torsionFrictionCoefficientStatic_.

{
    if (new_mu >= 0)
    {
        torsionFrictionCoefficient_ = new_mu;
        torsionFrictionCoefficientStatic_ = torsionFrictionCoefficient_;
    }
    else
    {
        std::cerr << "Error in setSlidingFrictionCoefficient" << std::endl;
        exit(-1);
    }
}

void MindlinRollingTorsionSpecies::setTorsionFrictionCoefficientStatic

(

Mdouble

new_mu

)

Allows the static Coulomb torsion friction coefficient to be accessed.

Allows the static Coulomb friction coefficient to be changed; also sets mu_s by default.

Definition at line 284 of file MindlinRollingTorsionSpecies.cc.

References torsionFrictionCoefficientStatic_.

{
    if (new_mu >= 0)
    {
        torsionFrictionCoefficientStatic_ = new_mu;
    }
    else
    {
        std::cerr << "Error in setSlidingFrictionCoefficientStatic" << std::endl;
        exit(-1);
    }
}

void MindlinRollingTorsionSpecies::write ( std::ostream &  os ) const

overridevirtual

Writes the species properties to an output stream.

Parameters

[out]

os

output stream (typically the restart file)

Implements BaseObject.

Definition at line 78 of file MindlinRollingTorsionSpecies.cc.

References rollingDissipation_, rollingFrictionCoefficient_, rollingFrictionCoefficientStatic_, rollingStiffness_, torsionDissipation_, torsionFrictionCoefficient_, torsionFrictionCoefficientStatic_, torsionStiffness_, and MindlinSpecies::write().

{
    MindlinSpecies::write(os);
    os  << " rollingStiffness " << rollingStiffness_;
    os  << " rollingDissipation " << rollingDissipation_;
    os  << " rollingFrictionCoefficient " << rollingFrictionCoefficient_;
    os  << " rollingFrictionCoefficientStatic " << rollingFrictionCoefficientStatic_;
    os  << " torsionStiffness " << torsionStiffness_;
    os  << " torsionDissipation " << torsionDissipation_;
    os  << " torsionFrictionCoefficient " << torsionFrictionCoefficient_;
    os  << " torsionFrictionCoefficientStatic " << torsionFrictionCoefficientStatic_;
}

Member Data Documentation

Mdouble MindlinRollingTorsionSpecies::rollingDissipation_

private

rolling dissipation coefficient.

Typically set to 2/5 of the normal force dissipation, as both the tangential and the normal spring have the same restitution coefficients (if the rolling and normal stiffnesses also have a ratio of 2/5).

Definition at line 136 of file MindlinRollingTorsionSpecies.h.

Referenced by getRollingDissipation(), MindlinRollingTorsionSpecies(), mix(), read(), setRollingDissipation(), and write().

Mdouble MindlinRollingTorsionSpecies::rollingFrictionCoefficient_

private

(dynamic) Coulomb rolling friction coefficient.

Definition at line 142 of file MindlinRollingTorsionSpecies.h.

Referenced by getRollingFrictionCoefficient(), MindlinRollingTorsionSpecies(), mix(), read(), setRollingFrictionCoefficient(), and write().

Mdouble MindlinRollingTorsionSpecies::rollingFrictionCoefficientStatic_

private

static Coulomb rolling friction coefficient (by default set equal to the dynamic one).

Definition at line 148 of file MindlinRollingTorsionSpecies.h.

Referenced by getRollingFrictionCoefficientStatic(), MindlinRollingTorsionSpecies(), mix(), read(), setRollingFrictionCoefficient(), setRollingFrictionCoefficientStatic(), and write().

Mdouble MindlinRollingTorsionSpecies::rollingStiffness_

private

rolling stiffness.

Typically set to 2/5 of the stiffness of the normal force, as both the rolling and the normal spring have the same oscillation frequency (and thus require the same timeStep)in this case.

Definition at line 128 of file MindlinRollingTorsionSpecies.h.

Referenced by MindlinRollingTorsionSpecies(), read(), and write().

Mdouble MindlinRollingTorsionSpecies::torsionDissipation_

private

rolling dissipation coefficient.

Typically set to 2/5 of the normal force dissipation, as both the tangential and the normal spring have the same restitution coefficients (if the rolling and normal stiffnesses also have a ratio of 2/5).

Definition at line 164 of file MindlinRollingTorsionSpecies.h.

Referenced by getTorsionDissipation(), MindlinRollingTorsionSpecies(), mix(), read(), setTorsionDissipation(), and write().

Mdouble MindlinRollingTorsionSpecies::torsionFrictionCoefficient_

private

(dynamic) Coulomb torsion friction coefficient.

Definition at line 169 of file MindlinRollingTorsionSpecies.h.

Referenced by getTorsionFrictionCoefficient(), MindlinRollingTorsionSpecies(), mix(), read(), setTorsionFrictionCoefficient(), and write().

Mdouble MindlinRollingTorsionSpecies::torsionFrictionCoefficientStatic_

private

static Coulomb torsion friction coefficient (by default set equal to the dynamic one).

Definition at line 175 of file MindlinRollingTorsionSpecies.h.

Referenced by getTorsionFrictionCoefficientStatic(), MindlinRollingTorsionSpecies(), mix(), read(), setTorsionFrictionCoefficient(), setTorsionFrictionCoefficientStatic(), and write().

Mdouble MindlinRollingTorsionSpecies::torsionStiffness_

private

rolling stiffness.

Typically set to 2/5 of the stiffness of the normal force, as both the rolling and the normal spring have the same oscillation frequency (and thus require the same timeStep)in this case.

Definition at line 156 of file MindlinRollingTorsionSpecies.h.

Referenced by MindlinRollingTorsionSpecies(), read(), and write().

---

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

• Species/FrictionForceSpecies/MindlinRollingTorsionSpecies.h
• Species/FrictionForceSpecies/MindlinRollingTorsionSpecies.cc