mohrcoulombpar Class Reference

#include <mohrcparab.h>

Public Member Functions
void	changeparam (atsel &atm, vector &val)
void	derplaspotsigma (matrix &sig, matrix &dfds)
void	deryieldfsigma (matrix &sig, matrix &dfds)
double	give_consparam (long ipp, long ido)
void	giveirrstrains (long ipp, long ido, vector &epsp)
void	matstiff (matrix &d, long ipp, long ido)
	mohrcoulombpar (void)
void	nlstresses (long ipp, long im, long ido)
void	nonloc_nlstresses (long ipp, long im, long ido)
void	read (XFILE *in)
void	updateval (long ipp, long im, long ido)
double	yieldfunction (matrix &sig)
	~mohrcoulombpar (void)
Public Attributes
double	alphaphi
	parameter alpha for phi
double	alphapsi
	parameter alpha for psi
double	betaphi
	parameter beta for phi
double	betapsi
	parameter beta for psi
double	c
	cohesion
double	phi
	friction angle
double	psi
	dilation
double	sigcphi
	parameter sig cap for phi
double	sigcpsi
	parameter sig cap for psi
strretalg	sra
	stress return algorithm

Detailed Description

This class defines plastic material model with parabolic Mohr-Coulomb yield criterion.

Created by Tomas Koudelka,

Definition at line 15 of file mohrcparab.h.

Constructor & Destructor Documentation

mohrcoulombpar ( void )

The constructor inializes attributes to zero values.

Definition at line 20 of file mohrcparab.cpp.

References alphaphi, alphapsi, betaphi, betapsi, c, phi, psi, sigcphi, and sigcpsi.

~mohrcoulombpar ( void )

The destructor is defined only for the formal purposes.

Definition at line 32 of file mohrcparab.cpp.

Member Function Documentation

void changeparam	(	atsel &	atm,
		vector &	val
	)

The function changes material parameters for stochastic analysis.

Parameters:

	atm	- selected material parameters (parameters which are changed)
	val	- array containing new values of parameters

Returns:: The function does not return anything.

Created by Tomas Koudelka,

Definition at line 364 of file mohrcparab.cpp.

References alphaphi, alphapsi, atsel::atrib, betaphi, betapsi, c, atsel::num, phi, print_err(), psi, sigcphi, and sigcpsi.

void derplaspotsigma	(	matrix &	sig,
		matrix &	dfds
	)

The function computes derivatives of plastic potential function with respect of stress tensor sigma.

Parameters:

	sig	- stress tensor
	dgds	- matrix of derivatives of the plastic potential function (output)

Returns:: The function returns resulting derivatives in the parameter dgds.

Created by Tomas Koudelka, 4.1.2002

Definition at line 138 of file mohrcparab.cpp.

References betapsi, deviator(), first_invar(), second_invar(), and sigcpsi.

Referenced by mechmat::dgdsigma().

void deryieldfsigma	(	matrix &	sig,
		matrix &	dfds
	)

The function computes derivatives of as-th yield function with respect of vector sigma.

Parameters:

	sig	- stress tensor
	dfds	- matrix of derivatives of the yield function (output)

Returns:: The function returns resulting derivatives in the parameter dfds.

Created by Tomas Koudelka, 4.1.2002

Definition at line 103 of file mohrcparab.cpp.

References betaphi, deviator(), first_invar(), second_invar(), and sigcphi.

Referenced by mechmat::dfdsigma().

double give_consparam	(	long	ipp,
		long	ido
	)

The function extracts consistency parametr gamma for the reached equilibrium state from the other array of the given integration point.

Parameters:

	ipp	- integration point number in the mechmat ip array.
	ido	- index of internal variables for given material in the ipp other array

Returns:: The function returns value of consistency parameter.

Created by Tomas Koudelka,

Definition at line 341 of file mohrcparab.cpp.

References intpoints::eqother, mechmat::ip, Mm, and intpoints::ncompstr.

Referenced by mechmat::give_consparam().

void giveirrstrains	(	long	ipp,
		long	ido,
		vector &	epsp
	)

Function returns irreversible plastic strains.

Parameters:

	ipp	- integration point number in the mechmat ip array.
	ido	- index of the first internal variable for given material in the ipp other array
	epsp	- vector of irreversible strains (output)

Returns:: The function returns vector of irreversible strains in the parameter epsp.

Created by Tomas Koudelka,

Definition at line 321 of file mohrcparab.cpp.

References intpoints::eqother, mechmat::ip, Mm, and vector::n.

Referenced by mechmat::giveirrstrains().

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

The function computes material stiffnes matrix.

Parameters:

	d	- allocated matrix structure for material stiffness matrix (output)
	ipp	- integration point number

Returns:: The function returns resulting stiffnes matrix in the parameter d.

Created by Tomas Koudelka, 4.1.2002

Definition at line 172 of file mohrcparab.cpp.

References mechmat::elmatstiff(), Mm, Mp, probdesc::nlman, and nonlinman::stmat.

Referenced by mechmat::matstiff().

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

The function computes stresses at given integration point ipp, depending on the reached strains. The cutting plane algorithm is used. The stresses and other array of given integration point are actualized.

Parameters:

	ipp	- integration point number in the mechmat ip array.
	im	- index of material type for given ip
	ido	- index of internal variables for given material in the ipp other array

Returns:: The function does not return anything.

Created by Tomas Koudelka,

Definition at line 201 of file mohrcparab.cpp.

References cp, mechmat::cutting_plane(), intpoints::eqother, strretalg::give_err(), strretalg::give_ni(), strretalg::give_tsra(), mechmat::ip, Mm, intpoints::ncompstr, intpoints::other, print_err(), sra, and intpoints::strain.

Referenced by mechmat::compnonloc_nlstresses(), and mechmat::computenlstresses().

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

The function computes stresses at given integration point ipp, depending on the reached averaged nonlocal strains. The cutting plane algorithm is used. The stresses and other array of given integration point are actualized.

Parameters:

	ipp	- integration point number in the mechmat ip array.
	im	- index of material type for given ip
	ido	- index of internal variables for given material in the ipp other array

Returns:: The function does not return anything.

Created by Tomas Koudelka,

Definition at line 251 of file mohrcparab.cpp.

References cp, mechmat::cutting_plane(), intpoints::eqother, strretalg::give_err(), strretalg::give_ni(), strretalg::give_tsra(), mechmat::ip, Mm, intpoints::ncompstr, intpoints::nonloc, intpoints::other, print_err(), sra, and intpoints::strain.

Referenced by mechmat::compnonloc_nlstresses().

void read ( XFILE * in )

The function reads material parameters from the opened text file given by the parameter in. Internal parameters alpha, beta and sigc for phi and psi are evaluated.

Parameters:

in

- pointer to the opned text file

Returns:: The function does not return anything.

Created by Tomas Koudelka,

Definition at line 50 of file mohrcparab.cpp.

References alphaphi, alphapsi, betaphi, betapsi, c, phi, psi, strretalg::read(), sigcphi, sigcpsi, sra, and xfscanf().

Referenced by mechmat::readmattype().

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

The function updates values in the other array reached in the previous equlibrium state to values reached in the new actual equilibrium state.

Parameters:

	ipp	- integration point number in the mechmat ip array.
	im	- index of material type for given ip
	ido	- index of internal variables for given material in the ipp other array