The transient driver specialized for solid mechanics problems. More...

Detailed Description

The transient driver specialized for solid mechanics problems.

Derived classes should implement the SolidMechanicsDriver::update_forces method to update the driving forces based on the assumptions on kinematics, i.e., small vs large deformation, incremental vs total etc.

#include <SolidMechanicsDriver.h>

Inheritance diagram for SolidMechanicsDriver:

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Public Member Functions
	SolidMechanicsDriver (const OptionSet &options)

void	setup () override
	Setup this object.

void	diagnose () const override
	Check for common problems.

Public Member Functions inherited from TransientDriver
	TransientDriver (const OptionSet &options)

void	setup () override
	Setup this object.

void	diagnose () const override
	Check for common problems.

bool	run () override
	Let the driver run, return `true` upon successful completion, and return `false` otherwise.

virtual torch::nn::ModuleDict	result () const
	The results (input and output) from all time steps.

virtual std::string	save_as_path () const
	The destination file/path to save the results.

Public Member Functions inherited from ModelDriver
	ModelDriver (const OptionSet &options)

const Model &	model () const

Public Member Functions inherited from Driver
	Driver (const OptionSet &options)
	Construct a new Driver object.

Public Member Functions inherited from NEML2Object
	NEML2Object ()=delete

	NEML2Object (NEML2Object &&)=delete

	NEML2Object (const NEML2Object &)=delete

NEML2Object &	operator= (NEML2Object &&)=delete

NEML2Object &	operator= (const NEML2Object &)=delete

virtual	~NEML2Object ()=default

	NEML2Object (const OptionSet &options)
	Construct a new NEML2Object object.

const OptionSet &	input_options () const

const std::string &	name () const
	A readonly reference to the object's name.

const std::string &	type () const
	A readonly reference to the object's type.

const std::string &	path () const
	A readonly reference to the object's path.

const std::string &	doc () const
	A readonly reference to the object's docstring.

template<typename T = NEML2Object>
const T *	host () const
	Get a readonly pointer to the host.

template<typename T = NEML2Object>
T *	host ()
	Get a writable pointer to the host.

Public Member Functions inherited from DiagnosticsInterface
	DiagnosticsInterface ()=delete

	DiagnosticsInterface (NEML2Object *object)

	DiagnosticsInterface (DiagnosticsInterface &&)=delete

	DiagnosticsInterface (const DiagnosticsInterface &)=delete

DiagnosticsInterface &	operator= (const DiagnosticsInterface &)=delete

DiagnosticsInterface &	operator= (DiagnosticsInterface &&)=delete

virtual	~DiagnosticsInterface ()=default

const NEML2Object &	object () const
	Get the object.

Static Public Member Functions
static OptionSet	expected_options ()

Static Public Member Functions inherited from TransientDriver
static OptionSet	expected_options ()

Static Public Member Functions inherited from ModelDriver
static OptionSet	expected_options ()

Static Public Member Functions inherited from Driver
static OptionSet	expected_options ()

Static Public Member Functions inherited from NEML2Object
static OptionSet	expected_options ()

Protected Member Functions
void	update_forces () override
	Update the driving forces for the current time step.


virtual void	init_strain_control (const OptionSet &)=0

virtual void	init_stress_control (const OptionSet &)=0

virtual void	init_mixed_control (const OptionSet &)

virtual void	init_temperature_control (const OptionSet &)

Protected Member Functions inherited from TransientDriver
virtual bool	solve ()
	Solve the initial value problem.

virtual void	advance_step ()
	Advance in time: the state becomes old state, and forces become old forces.

virtual void	apply_ic ()
	Apply the initial conditions.

virtual void	apply_predictor ()
	Apply the predictor to calculate the initial guess for the current time step.

virtual void	solve_step ()
	Perform the constitutive update for the current time step.

virtual void	store_input ()
	Save the input of the current time step.

virtual void	output () const
	Save the results into the destination file/path.

Protected Attributes
const EnumSelection	_control
	The control method to drive the constitutive update.


VariableName	_driving_force_name

SR2	_driving_force
	The value of the driving force.


VariableName	_mixed_control_name

SR2	_mixed_control
	Actual control signal, when used for control == "MIXED".


const bool	_temperature_prescribed

VariableName	_temperature_name
	Name of the temperature variable.

Scalar	_temperature
	Temperature.

Protected Attributes inherited from TransientDriver
const VariableName	_time_name
	VariableName for the time.

Scalar	_time
	The current time.

Size	_step_count = 0
	The current step count.

const Size	_nsteps
	Total number of steps.

ValueMap	_in
	The input to the constitutive model.

const EnumSelection	_predictor
	The predictor used to set the initial guess.

std::vector< ValueMap >	_result_in
	Inputs from all time steps.

std::vector< ValueMap >	_result_out
	Outputs from all time steps.

std::vector< VariableName >	_driving_force_names
	Driving forces (other than time)

std::vector< Tensor >	_driving_forces

std::string	_save_as
	The destination file name or file path.

Protected Attributes inherited from ModelDriver
Model &	_model
	The model which the driver uses to perform constitutive updates.

const Device	_device
	The device on which to evaluate the model.

const bool	_show_params
	Set to true to list all the model parameters at the beginning.

const bool	_show_input
	Set to true to show model's input axis at the beginning.

const bool	_show_output
	Set to true to show model's output axis at the beginning.

Protected Attributes inherited from Driver
bool	_verbose
	Whether to print out additional (debugging) information during the execution.

Constructor & Destructor Documentation

◆ SolidMechanicsDriver()

SolidMechanicsDriver ( const OptionSet & options )

Member Function Documentation

◆ diagnose()

void diagnose ( ) const

overridevirtual

Check for common problems.

This method serves as the entry point for diagnosing common problems in object setup. The idea behind this method is that while some errors could be detected at construction time, i.e., when the object's constructor is called, it doesn't hinder other objects' creation. We therefore would like to defer the detection of errors until after all objects have been created, collect all errors at once, and present the user with a complete understanding of all errors encountered.

Note, however, if an error could interfere with other objects' creation, it should be raised right away inside the constructor, instead of inside this method.

Reimplemented from ModelDriver.

◆ expected_options()

OptionSet expected_options ( )

static

◆ init_mixed_control()

void init_mixed_control ( const OptionSet & options )

protectedvirtual

◆ init_strain_control()

virtual void init_strain_control ( const OptionSet & )

protectedpure virtual

Control-specific initialization

Implemented in LDISolidMechanicsDriver, and SDTSolidMechanicsDriver.

◆ init_stress_control()

virtual void init_stress_control ( const OptionSet & )

protectedpure virtual

Implemented in LDISolidMechanicsDriver, and SDTSolidMechanicsDriver.

◆ init_temperature_control()

void init_temperature_control ( const OptionSet & options )

protectedvirtual

◆ setup()

void setup ( )

overridevirtual

Setup this object.

This method is called automatically if you use the Factory method get_object or get_object_ptr, right after construction. This serves as the entry point for things that are not convenient/possible to do at construction time, but are necessary before this object can be used (by others).

Reimplemented from ModelDriver.

◆ update_forces()

void update_forces ( )

overrideprotectedvirtual

Update the driving forces for the current time step.

Reimplemented from TransientDriver.

Member Data Documentation

◆ _control

const EnumSelection _control

protected

The control method to drive the constitutive update.

STRAIN: Use strain control to drive the update. STRESS: Use stress control to drive the update. MIXED: Use mixed stress/strain control with signal provided by _control_name

◆ _driving_force

SR2 _driving_force

protected

The value of the driving force.

◆ _driving_force_name

VariableName _driving_force_name

protected

The name of the driving force

◆ _mixed_control

SR2 _mixed_control

protected

Actual control signal, when used for control == "MIXED".

◆ _mixed_control_name

VariableName _mixed_control_name

protected

Name of the control signal for mixed stress/strain control

◆ _temperature

Scalar _temperature

protected

Temperature.

◆ _temperature_name

VariableName _temperature_name

protected

Name of the temperature variable.

◆ _temperature_prescribed

const bool _temperature_prescribed

protected

Whether temperature is prescribed

Detailed Description

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Constructor & Destructor Documentation

◆ SolidMechanicsDriver()

Member Function Documentation

◆ diagnose()

◆ expected_options()

◆ init_mixed_control()

◆ init_strain_control()

◆ init_stress_control()

◆ init_temperature_control()

◆ setup()

◆ update_forces()

Member Data Documentation

◆ _control

◆ _driving_force

◆ _driving_force_name

◆ _mixed_control

◆ _mixed_control_name

◆ _temperature

◆ _temperature_name

◆ _temperature_prescribed