glasgmech Class Reference

#include <glasgmech.h>

Public Member Functions
double	betacoeff (long ipp, double t)
void	compute_lits (long ipp, vector &epstm, matrix &sigt, double told, double tnew)
void	compute_thermdilat (double t, double dt, matrix &eps)
void	damfuncpar (long ipp, vector &eps, vector &kappa)
double	damfunction (long ipp, double tempr, double chi, vector &kappa)
void	depseqdepsel (long ipp, vector &eps, vector &deeqdeel)
double	domegadkmd (long ipp, double tempr, double chi, vector &kappa)
double	domegadt (long ipp, double tempr, double chi, vector &kappa)
double	dtdfdt (long ipp, double tempr, vector &kappa)
	glasgmech ()
void	matstiff (matrix &d, long ipp, long ido)
void	nlstresses (long ipp, long im, long ido)
void	read (XFILE *in)
double	thermdamfunction (long ipp, double tempr, vector &kappa)
	~glasgmech ()
Public Attributes
double	a
	parameters of LITS (Load Induced Thermal Strains)
double	b
double	c
paramf_type	ft
	type of norm of equivalent strains
double	gf0
	fracture energy at room temperature
double	k
	ratio between compressive and tensile strengths
double	lc
	characteristic length
double	st
	tensile strength
double	tkappa0
	thermal damage threshold

Detailed Description

class contains mechanical part of the Glasgow material model of hygro-thermo-mechanical problems

strain rate is the sum of rates of elastic, plastic, free thermal, creep and load induced thermal strains

stored values in the array eqother: previous total stresses, previous total strains, total irreversible strains, previous temperature, equivalent strain, mechanical damage parameter, maximum reached normalized temperature, thermal damage parameter

Definition at line 22 of file glasgmech.h.

Constructor & Destructor Documentation

glasgmech ( void )

Definition at line 15 of file glasgmech.cpp.

References a, b, c, ft, gf0, k, lc, st, and tkappa0.

~glasgmech ( void )

Definition at line 28 of file glasgmech.cpp.

Member Function Documentation

double betacoeff	(	long	ipp,
		double	t
	)

function computes coefficient beta

Parameters:

	ipp	- number of integration point
	t	- temperature

13.7.2004

Definition at line 51 of file glasgmech.cpp.

References a, b, and c.

Referenced by compute_lits().

void compute_lits	(	long	ipp,
		vector &	epstm,
		matrix &	sigt,
		double	told,
		double	tnew
	)

function computes increments of load induced thermal strains

Parameters:

	ipp	- integration point number
	epstm	- result vector of increments of load induced thermal strains
	sigt	- stress tensor
	told	- previous temperature
	tnew	- actual temperature

Definition at line 433 of file glasgmech.cpp.

References betacoeff(), cmulm(), mechmat::eliso, elisomat, extractnegv(), fillm(), fillv(), first_invar(), intpoints::gemid(), mechmat::ip, k, lgmatrixtransf(), limit, Mm, Mp, nijac, elastisomat::nu, princ_val(), intpoints::ssst, st, strain, tensor_vector(), intpoints::tm, and probdesc::zero.

Referenced by nlstresses().

void compute_thermdilat	(	double	t,
		double	dt,
		matrix &	eps
	)

function computes

Parameters:

	t	- temeprature
	dt	- incrment of temperature
	eps	- thermal strain increment

Definition at line 355 of file glasgmech.cpp.

References fillm().

Referenced by nlstresses().

void damfuncpar	(	long	ipp,
		vector &	eps,
		vector &	kappa
	)

function computes norm of equivalent strains

Parameters:

	ipp	- number of integration point
	eps	- vector of the strains
	kappa	- vector where the computed parameters are stored

Definition at line 81 of file glasgmech.cpp.

References a, allocm(), allocv(), b, deviator(), elastisomat::e, mechmat::eliso, elisomat, extractposv(), fillv(), first_invar(), ft, intpoints::gemid(), mechmat::ip, k, limit, Mm, Mp, intpoints::ncompstr, nijac, normazar, elastisomat::nu, princ_val(), scprd(), second_invar(), intpoints::ssst, strain, intpoints::tm, vector_tensor(), vonmises, and probdesc::zero.

Referenced by nlstresses().

double damfunction	(	long	ipp,
		double	tempr,
		double	chi,
		vector &	kappa
	)

This function computes damage parameter omega which is the result of the damage function.

Parameters:

	ipp	- integration point number
	tempr	- actual temperature
	chi	- thermal damage parameter
	kappa	- vector of the parameters of damage function

Definition at line 145 of file glasgmech.cpp.

References elastisomat::e, mechmat::eliso, elisomat, intpoints::gemid(), gf0, intpoints::idm, mechmat::ip, lc, Mm, st, and intpoints::tm.

Referenced by nlstresses().

void depseqdepsel	(	long	ipp,
		vector &	eps,
		vector &	deeqdeel
	)

Function computes derivatives of equivalent strain with respect of elastic strains.

Parameters:

	ipp	- integration point number
	epstm	- result vector of increments of load induced thermal strains
	sigt	- stress tensor
	told	- previous temperature
	tnew	- actual temperature

Definition at line 491 of file glasgmech.cpp.

References addv(), axisymm, cmulv(), deviator(), elastisomat::e, mechmat::eliso, elisomat, fillm(), fillv(), first_invar(), intpoints::gemid(), mechmat::ip, k, Mm, mxv(), intpoints::ncompstr, elastisomat::nu, planestrain, second_invar(), spacestress, intpoints::ssst, strain, intpoints::tm, and vector_tensor().

Referenced by nlstresses().

double domegadkmd	(	long	ipp,
		double	tempr,
		double	chi,
		vector &	kappa
	)

Function computes derivative of mechanical damage parameter with respect to equivalent strain

Parameters:

	ipp	- integration point number
	tempr	- actual temperature
	chi	- thermal damage parameter
	kappa	- vector of the parameters of damage function

Definition at line 203 of file glasgmech.cpp.

References elastisomat::e, mechmat::eliso, elisomat, intpoints::gemid(), gf0, intpoints::idm, mechmat::ip, lc, Mm, st, and intpoints::tm.

Referenced by nlstresses().

double domegadt	(	long	ipp,
		double	tempr,
		double	chi,
		vector &	kappa
	)

Function computes derivative of mechanical damage parameter with respect to temperature

Parameters:

	ipp	- integration point number
	tempr	- actual temperature
	chi	- thermal damage parameter
	kappa	- vector of the parameters of damage function

Definition at line 262 of file glasgmech.cpp.

References elastisomat::e, mechmat::eliso, elisomat, intpoints::gemid(), gf0, intpoints::idm, mechmat::ip, lc, Mm, st, and intpoints::tm.

Referenced by nlstresses().

double dtdfdt	(	long	ipp,
		double	tempr,
		vector &	kappa
	)

function computes derivative of thermal damage function with respect to temperature kappa_td is notation in the notes

Parameters:

	ipp	- integration point number
	tempr	- actual temperature
	kappa	- vector of the parameters of thermal damage function it contains the maximum of either the largest value attained by temperature or the reference temperature

Definition at line 409 of file glasgmech.cpp.

References tkappa0.

Referenced by nlstresses().

void matstiff	(	matrix &	d,
		long	ipp,
		long	ido
	)

This function computes material stiffnes matrix.

Parameters:

	d	- allocated matrix structure for material stiffness matrix
	ipp	- integration point number
	ido	- index of internal variables for given material in the ipp other array

Definition at line 325 of file glasgmech.cpp.

References cmulm(), mechmat::elmatstiff(), intpoints::eqother, initial_stiff, mechmat::ip, Mm, Mp, probdesc::nlman, nonlinman::stmat, and tangent_stiff.

Referenced by mechmat::matstiff().

void nlstresses	(	long	ipp,
		long	im,
		long	ido
	)

function computes correct stresses in the integration point and stores them into ip stress array.

Parameters:

	ipp	- integration point pointer
	im	- index of material
	ido	- index of the viscous material in the array eqother

Definition at line 586 of file glasgmech.cpp.

References cmulm(), cmulv(), compute_lits(), compute_thermdilat(), damfuncpar(), damfunction(), depseqdepsel(), domegadkmd(), domegadt(), dtdfdt(), mechmat::elmatstiff(), intpoints::eqother, mechmat::givenonmechq(), mechmat::ip, mechmat::matstiff(), Mm, mxv(), intpoints::ncompstr, scprd(), intpoints::ssst, mechmat::storestress(), strain, intpoints::strain, intpoints::stress, stress, subv(), temperature, tensor_vector(), thermdamfunction(), and vector_tensor().

Referenced by mechmat::computenlstresses().

void read ( XFILE * in )

function reads input data from the input text file

Definition at line 36 of file glasgmech.cpp.

References a, b, c, ft, gf0, k, lc, paramf_type_kwdset(), st, tkappa0, and xfscanf().

Referenced by mechmat::readmattype().

double thermdamfunction	(	long	ipp,
		double	tempr,
		vector &	kappa
	)

This function computes thermal damage parameter chi which is the result of the thermal damage function.

Parameters:

	ipp	- integration point number
	tempr	- actual temperature
	kappa	- vector of the parameters of thermal damage function it contains the maximum of either the largest value attained by temperature or the reference temperature

Definition at line 384 of file glasgmech.cpp.

References tkappa0.

Referenced by nlstresses().