material::Material Class Reference

Collection of methods and database related to peridynamic material. More...

#include <material.h>

Inheritance diagram for material::Material:

Collaboration diagram for material::Material:

Public Member Functions
	Material (std::string name="")
	Constructor.
virtual	~Material ()
	Destructor.
std::string	name ()
	Returns name of the material.
size_t	getDimension ()
	Returns dimension of the problem.
bool	isPlaneStrain ()
	Returns plane-strain condition.
virtual bool	isStateActive () const =0
	Returns true if state-based potential is active.
virtual std::pair< double, double >	getBondEF (const double &r, const double &s, bool &fs, const bool &break_bonds) const =0
	Returns energy and force between bond due to pairwise interaction.
virtual std::pair< double, double >	getBondEF (const double &r, const double &s, bool &fs, const double &mx, const double &thetax) const =0
	Returns energy and force between bond due to state-based model.
virtual util::Point	getBondForceDirection (const util::Point &dx, const util::Point &du) const =0
	Returns the unit vector along which bond-force acts.
virtual double	getS (const util::Point &dx, const util::Point &du) const =0
	Returns the bond strain.
virtual double	getSc (const double &r) const =0
	Returns critical bond strain.
virtual double	getDensity () const =0
	Returns the density of the material.
virtual double	getInfFn (const double &r) const =0
	Returns the value of influence function.
virtual double	getMoment (const size_t &i) const =0
	Returns the moment of influence function.
virtual double	getHorizon () const =0
	Returns horizon.
virtual inp::MatData	computeMaterialProperties (const size_t &dim) const =0
	Computes elastic and fracture material properties and returns the data.
virtual std::string	printStr (int nt, int lvl) const
	Returns the string containing printable information about the object.
virtual void	print (int nt, int lvl) const
	Prints the information about the object.
virtual void	print () const
	Prints the information about the object.

Private Attributes
std::string	d_name
	Name of the material.

Detailed Description

Collection of methods and database related to peridynamic material.

At present we have implemented both bond-based and state-based model. We consider RNP regularized potential proposed and studied in Lipton 2016, Jha and Lipton 2018, Diehl et al 2018, Jha and Lipton 2019. We have also implemented PMB material model (Prototypical micro-elastic brittle material), see Silling 2000.

A class providing methods to compute energy density and force of peridynamic material

Definition at line 76 of file material.h.

Constructor & Destructor Documentation

Material()

material::Material::Material ( std::string  name = "" )

inlineexplicit

Constructor.

Parameters

name	Name of material model

Definition at line 83 of file material.h.

: d_name(name) {}

~Material()

virtual material::Material::~Material ( )

inlinevirtual

Destructor.

Make it virtual so that class inheriting from it are destroyed properly.

Definition at line 90 of file material.h.

{}

Member Function Documentation

computeMaterialProperties()

virtual inp::MatData material::Material::computeMaterialProperties ( const size_t &  dim ) const

pure virtual

Computes elastic and fracture material properties and returns the data.

Parameters

dim	Dimension of the problem

Returns

Data Material data

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getBondEF() [1/2]

virtual std::pair< double, double > material::Material::getBondEF ( const double &  r, const double &  s, bool &  fs, const bool &  break_bonds  ) const

pure virtual

Returns energy and force between bond due to pairwise interaction.

Parameters

r	Reference (initial) bond length
s	Bond strain
fs	Bond fracture state
break_bonds	Flag to specify whether bonds are allowed to break or not

Returns

value Pair of energy and force

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getBondEF() [2/2]

virtual std::pair< double, double > material::Material::getBondEF ( const double &  r, const double &  s, bool &  fs, const double &  mx, const double &  thetax  ) const

pure virtual

Returns energy and force between bond due to state-based model.

Parameters

r	Reference (initial) bond length
s	Bond strain
fs	Bond fracture state
mx	Weighted volume at node
thetax	Dilation

Returns

value Pair of energy and force

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getBondForceDirection()

virtual util::Point material::Material::getBondForceDirection ( const util::Point &  dx, const util::Point &  du  ) const

pure virtual

Returns the unit vector along which bond-force acts.

Parameters

dx	Reference bond vector
du	Difference of displacement

Returns

vector Unit vector

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getDensity()

virtual double material::Material::getDensity ( ) const

pure virtual

Returns the density of the material.

Returns

density Density of the material

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getDimension()

size_t material::Material::getDimension ( )

inline

Returns dimension of the problem.

Returns

dim Dimension

Definition at line 102 of file material.h.

{ return dimension; }

getHorizon()

virtual double material::Material::getHorizon ( ) const

pure virtual

Returns horizon.

Returns

horizon Horizon

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getInfFn()

virtual double material::Material::getInfFn ( const double &  r ) const

pure virtual

Returns the value of influence function.

Parameters

r	Reference (initial) bond length

Returns

value Influence function at r

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getMoment()

virtual double material::Material::getMoment ( const size_t &  i ) const

pure virtual

Returns the moment of influence function.

If \( J(r) \) is the influence function for \( r\in [0,1)\) then \( i^{th}\) moment is given by

\[ M_i = \int_0^1 J(r) r^i dr. \]

Parameters

i	ith moment

Returns

value Moment

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getS()

virtual double material::Material::getS ( const util::Point &  dx, const util::Point &  du  ) const

pure virtual

Returns the bond strain.

Parameters

dx	Reference bond vector
du	Difference of displacement

Returns

strain Bond strain \( S = \frac{du \cdot dx}{|dx|^2} \)

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

getSc()

virtual double material::Material::getSc ( const double &  r ) const

pure virtual

Returns critical bond strain.

Parameters

r	Reference length of bond

Returns

strain Critical strain

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

isPlaneStrain()

bool material::Material::isPlaneStrain ( )

inline

Returns plane-strain condition.

Returns

bool True if plane-strain active

Definition at line 108 of file material.h.

{ return is_plane_strain; }

isStateActive()

virtual bool material::Material::isStateActive ( ) const

pure virtual

Returns true if state-based potential is active.

Returns

bool True/false

Implemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

name()

std::string material::Material::name ( )

inline

Returns name of the material.

Returns

string Name

Definition at line 96 of file material.h.

{ return d_name; }

References d_name.

print() [1/2]

virtual void material::Material::print ( ) const

inlinevirtual

Prints the information about the object.

Reimplemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

Definition at line 240 of file material.h.

{ print(0, 0); }

References print().

Referenced by print().

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print() [2/2]

virtual void material::Material::print ( int  nt, int  lvl  ) const

inlinevirtual

Prints the information about the object.

Parameters

nt	Number of tabs to append before printing
lvl	Information level (higher means more information)

Reimplemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

Definition at line 237 of file material.h.

{ std::cout << printStr(nt, lvl); }

References printStr().

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printStr()

virtual std::string material::Material::printStr ( int  nt, int  lvl  ) const

inlinevirtual

Returns the string containing printable information about the object.

Parameters

nt	Number of tabs to append before printing
lvl	Information level (higher means more information)

Returns

string String containing printable information about the object

Reimplemented in material::RnpMaterial, material::PmbMaterial, material::PdElastic, and material::PdState.

Definition at line 217 of file material.h.

                                                    {
 
    auto tabS = util::io::getTabS(nt);
    std::ostringstream oss;
    oss << tabS << "------- particle::Material --------" << std::endl
        << std::endl;
    oss << tabS << "Abstract class of peridynamic materials" << std::endl;
    oss << tabS << "See RnpMaterial and PmbMaterial for implementation"
        << std::endl;
    oss << tabS << std::endl;
 
    return oss.str();
  }

References util::io::getTabS().

Referenced by print().

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Field Documentation

d_name

std::string material::Material::d_name

private

Name of the material.

Definition at line 244 of file material.h.

Referenced by name().

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

• /home/user/project/src/material/mparticle/material.h