A class implementing the state-based elastic material model. More...

#include <ElasticState.h>

Inheritance diagram for material::pd::ElasticState:

Collaboration diagram for material::pd::ElasticState:

Public Member Functions
	ElasticState (inp::MaterialDeck deck, data::DataManager dataManager)
	Constructor. More...

std::pair< util::Point3, double >	getBondEF (size_t i, size_t j)
	Returns energy and force state between node i and node j. More...

util::Point3	getBondForceDirection (const util::Point3 &dx, const util::Point3 &du) const override
	Get direction of bond force. More...

double	getFactor2D ()
	return the factor for two-dimensional problems

double	getInfFn (const double &r) const
	Returns the value of influence function. More...

double	getSc (size_t i, size_t j)
	Returns critical bond strain between node i and node j. More...

util::Matrix33	getStrain (size_t i)
	Computes the strain vector for one node. More...

util::Matrix33	getStress (size_t i)
	Computes the stress tensor for one node. More...

void	update ()
	Let the material class in the quasi-static case know that there is a new loading step.

Public Member Functions inherited from material::pd::BaseMaterial
	BaseMaterial (const size_t &dim, const double &horizon)
	Constructor. More...

double	getDensity () const
	Returns the density of the material. More...

double	getHorizon () const
	Returns horizon. More...

virtual double	getS (const util::Point3 &dx, const util::Point3 &du)
	Returns the bond strain. More...

virtual double	getS (size_t i, size_t j)
	Returns the bond strain. More...

virtual double	getSc (const double &r)
	Returns critical bond strain. More...

bool	isStateActive () const
	Returns true if state-based potential is active. More...

std::string	name () const
	Returns name of the material. More...

virtual void	print (int nt=0, int lvl=0) const
	Prints the information about the instance of the object. More...

virtual std::string	printStr (int nt=0, int lvl=0) const
	Returns the string containing information about the instance of the object. More...

Private Member Functions
void	computeParameters (inp::MaterialDeck *deck, size_t dim)
	Computes elastic state-based material parameters from elastic constants. More...

Private Attributes
Pointers for the function parameters
const inp::MaterialDeck *	d_deck
	Pointer to the material deck.

data::DataManager *	d_dataManager_p
	Pointer to the nodes. More...

Helper functions to compute the stress and strain
double	d_factor2D
	Correction factor for using plain stress.

size_t	dim
	Dimension of the problem.

double	horizon

bool	strainEnergy
	Compute strain energy.

util::Matrix33	deformation_gradient (size_t i)
	Computes the deformation gradient for node i. More...

util::Point3	X_vector_state (size_t i, size_t j)
	Computes the x vector state between node i and node j. More...

util::Point3	Y_vector_state (size_t i, size_t j)
	Computes the y vector state between node i and node j. More...

util::Matrix33	K_shape_tensor (size_t i)
	Computes the K shape tensor for node i. More...

util::Matrix33	K_modulus_tensor (size_t i, size_t j, size_t k, size_t m)
	Computes the K modulus tensor. More...

double	dirac_delta (util::Point3 x, size_t i, size_t j, size_t m)
	Provide the image of x under the Dirac Delta Function. More...

Detailed Description

A class implementing the state-based elastic material model.

This class implements the the state-based elastic material model as described by Silling and implementation details are described by Littlewood.

See also: https://doi.org/10.1007/s10659-007-9125-1

Constructor & Destructor Documentation

◆ ElasticState()

material::pd::ElasticState::ElasticState	(	inp::MaterialDeck *	deck,
		data::DataManager *	dataManager
	)

Constructor.

Parameters

deck	Pointer to the input deck
DataManager	Pointer to the data manager object

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Member Function Documentation

◆ computeParameters()

void material::pd::ElasticState::computeParameters	(	inp::MaterialDeck *	deck,
		size_t	dim
	)

private

Computes elastic state-based material parameters from elastic constants.

Either Young's modulus E or bulk modulus K, and Poisson ratio $\nu$ , are needed.

Parameters

deck	Input material deck
M	Moment of influence function

Referenced by ElasticState().

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◆ deformation_gradient()

util::Matrix33 material::pd::ElasticState::deformation_gradient ( size_t i )

private

Computes the deformation gradient for node i.

Parameters

i	Id of node

Returns: The deformation gradient for node i

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◆ dirac_delta()

double material::pd::ElasticState::dirac_delta	(	util::Point3	x,
		size_t	i,
		size_t	j,
		size_t	m
	)

private

Provide the image of x under the Dirac Delta Function.

Parameters

deck	The input deck
problem	The corresponding problem
x	Node x
i	Node i
j	Neighbor j
k	Neighbor k
m	Index for the volume correction

Returns: 1 if x is a null-vector, otherwise 0

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◆ getBondEF()

std::pair< util::Point3, double > material::pd::ElasticState::getBondEF	(	size_t	i,
		size_t	j
	)

virtual

Returns energy and force state between node i and node j.

Parameters

i	Id of node i
j	Local id in the neighbor list of node i

Returns: Value Pair of energy and force

Reimplemented from material::pd::BaseMaterial.

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◆ getBondForceDirection()

util::Point3 material::pd::ElasticState::getBondForceDirection	(	const util::Point3 &	dx,
		const util::Point3 &	du
	)		const

inlineoverridevirtual

Get direction of bond force.

Returns: vector Unit vector along the bond force

Reimplemented from material::pd::BaseMaterial.

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◆ getInfFn()

double material::pd::ElasticState::getInfFn ( const double & r ) const

inlinevirtual

Returns the value of influence function.

Parameters

r	Reference (initial) bond length

Returns: value Influence function at r

Reimplemented from material::pd::BaseMaterial.

◆ getSc()

double material::pd::ElasticState::getSc	(	size_t	i,
		size_t	j
	)

virtual

Returns critical bond strain between node i and node j.

Parameters

i	Id of node i
j	Id of node j

Returns: Value Critical strain

Reimplemented from material::pd::BaseMaterial.

◆ getStrain()

util::Matrix33 material::pd::ElasticState::getStrain ( size_t i )

virtual

Computes the strain vector for one node.

Parameters

i	ID of node i

Returns: The strain tensor for node I

Reimplemented from material::pd::BaseMaterial.

◆ getStress()

util::Matrix33 material::pd::ElasticState::getStress ( size_t i )

virtual

Computes the stress tensor for one node.

Parameters

i	Id of node i

Returns: The stress tensor for node i

Reimplemented from material::pd::BaseMaterial.

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◆ K_modulus_tensor()

util::Matrix33 material::pd::ElasticState::K_modulus_tensor	(	size_t	i,
		size_t	j,
		size_t	k,
		size_t	m
	)

private

Computes the K modulus tensor.

Parameters

i	Node i
j	Neighbor j
k	Neighbor k
m	Index for the volume correction

Returns: The K modulus tensor

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◆ K_shape_tensor()

util::Matrix33 material::pd::ElasticState::K_shape_tensor ( size_t i )

private

Computes the K shape tensor for node i.

Parameters

i	Id of node

Returns: The K shape tensor for node i

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◆ X_vector_state()

util::Point3 material::pd::ElasticState::X_vector_state	(	size_t	i,
		size_t	j
	)

private

Computes the x vector state between node i and node j.

Parameters

i	Id of node
j	Id of node

Returns: The x vector state

◆ Y_vector_state()

util::Point3 material::pd::ElasticState::Y_vector_state	(	size_t	i,
		size_t	j
	)

private

Computes the y vector state between node i and node j.

Parameters

i	Id of node
j	Id of node

Returns: The y vector state

Field Documentation

◆ d_dataManager_p

data::DataManager* material::pd::ElasticState::d_dataManager_p

private

Pointer to the nodes.

Pointer to the weighted volumes of the nodes

Pointer to the volume correction of the nodes

Pointer to the volumes of the nodes

Pointer to the neighbors of the nodes

Referenced by ElasticState().

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

/root/project/src/material/pd/ElasticState.h
/root/project/src/material/pd/ElasticState.cpp

Public Member Functions

Private Member Functions

Private Attributes

Helper functions to compute the stress and strain

Detailed Description

Constructor & Destructor Documentation

◆ ElasticState()

Member Function Documentation

◆ computeParameters()

◆ deformation_gradient()

◆ dirac_delta()

◆ getBondEF()

◆ getBondForceDirection()

◆ getInfFn()

◆ getSc()

◆ getStrain()

◆ getStress()

◆ K_modulus_tensor()

◆ K_shape_tensor()

◆ X_vector_state()

◆ Y_vector_state()

Field Documentation

◆ d_dataManager_p