graphmat Class Reference

#include <graphmat.h>

Public Member Functions
	graphmat (void)
void	matstiff (matrix &d, long ipp)
void	nlstresses (long ipp)
long	read (XFILE *in)
	~graphmat (void)
Public Attributes
Equation **	deq
	array of functions of graph (displacement-stiffness graph)
Equation **	eq
	array of functions of graph (displacement-force graph)
graphtype	gt
	type of graph
double	k
	stiffness for linear elastic material
double *	limval
	array of limit values for each function
long	numf
	number of function
tablefunct *	tab
	table of values of graph

Detailed Description

The class defines special type of material model which is used for the spring support with nonlinear stiffness. The constitutive equation is described with force/displacement diagram. The diagram can be given by the table or by the expression written to the string which is parsed. The several equations for the different ranges can be given.

Definition at line 20 of file graphmat.h.

Constructor & Destructor Documentation

graphmat ( void )

The constructor inializes attributes to zero or default values.

Created by Tomas Koudelka

Definition at line 15 of file graphmat.cpp.

References deq, eq, glinear, gt, k, numf, and tab.

~graphmat ( void )

The destructor deallocates used memory.

Created by Tomas Koudelka

Definition at line 33 of file graphmat.cpp.

References deq, eq, numf, and tab.

Member Function Documentation

void matstiff	(	matrix &	d,
		long	ipp
	)

The function computes material stiffnes matrix.

Parameters:

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

Returns:: The function returns assembled stiffness matrix in the parameter d

Created by Tomas Koudelka

Definition at line 147 of file graphmat.cpp.

References deq, Equation::Evaluate(), tablefunct::getval2(), gfunc, gfunc_ser, glinear, gt, gtable, mechmat::ip, k, limval, matrix::m, Mm, intpoints::ncompstr, numf, print_err(), intpoints::strain, and tab.

Referenced by mechmat::matstiff().

void nlstresses ( long ipp )

The function computes stresses at given integration point ipp, depending on the reached strains. The stress of the given integration point is actualized.

Parameters:

ipp

- integration point number in the mechmat ip array.

Returns:: The function does not return anything.

Created by Tomas Koudelka

Definition at line 232 of file graphmat.cpp.

References eq, Equation::Evaluate(), for(), tablefunct::getval2(), gfunc, gfunc_ser, glinear, gt, gtable, mechmat::ip, k, limval, Mm, intpoints::ncompstr, numf, print_err(), intpoints::strain, intpoints::stress, and tab.

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

long read ( XFILE * in )

The function reads material parameters from the opened text file given by the parameter in. First it reads the graph type attribute which denotes type of used input of the diagram. Then the appropriate input function is called.

Parameters:

in

- pointer to the opned text file

Return values: