inter.c

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/*
%M This modules contains the INTERFACE material sub-class methods and 
   definitions
%a Joao Luiz Elias Campos.
%d September 2nd, 1998.
%r $Id: inter.c,v 1.1 2004/06/22 05:29:58 joaoluiz Exp $
%w (C) COPYRIGHT 1995-1996, Eduardo Nobre Lages.
   (C) COPYRIGHT 1997-1999, Joao Luiz Elias Campos.
   All Rights Reserved
   Duplication of this program or any part thereof without the express
   written consent of the author is prohibited.

   Modificacao: 28/04/2005    Alexandre A. Del Savio
     Foram substituídas todas as alocações dinâmicas feitas com malloc 
     por calloc.

*/

/*
** ------------------------------------------------------------------------
** Global variables and symbols:
*/
#include <stdio.h>
#include <stdlib.h>

#include "load.h"
#include "elm.h"
#include "material.h"
#include "node.h"
#include "rio.h"

/* Parent method
 */
void MaterialDensity ( sMaterial *, double * );


/*
** ------------------------------------------------------------------------
** Local variables and symbols:
*/

/*
%T INTERFACE material data definition
*/
typedef struct _isodata
{
 double Ks;            /* Shear rigidity moduless */
 double Kn;            /* Normal rigidity modules */
} sIntfData;


/*
** ------------------------------------------------------------------------
** Local functions:
*/


/*
** ------------------------------------------------------------------------
** Subclass methods:
*/
static void InterfaceNew        ( int, sMaterial ** );
static void InterfaceFree       ( sMaterial * );
static void InterfaceRead       ( sMaterial * );
static void InterfaceEParameter ( sMaterial *, double * );
static void InterfaceNuParameter( sMaterial *, double * );
static void InterfaceCMatrix    ( sMaterial *, double [6][6] );


/*
%F This method allocates memory for a INTERFACE material and fills its 
   data with the specific values.
%i Material label (number)
%o Material descriptor.
*/
static void InterfaceNew( int label, sMaterial **mat )
{
 sIntfData *data = 0L;

/* Get memory for the material descriptor
 */
 (*mat) = (sMaterial *)calloc(1, sizeof(sMaterial));

/* Get memory for the INTERFACE material data
 */
 data = (sIntfData *)calloc(1, sizeof(sIntfData));

/* Fill INTERFACE material data
 */
 data->Ks  = 0.0;
 data->Kn  = 0.0;

/* Fill material descriptor
 */
 (*mat)->type  = INTERFACE_MAT;
 (*mat)->label = label;
 (*mat)->Gamma = 0.0;
 (*mat)->data  = (void *)data;

/* Add to the material list
 */
 MatList[label-1] = (*mat);

} /* End of InterfaceNew */


/*
%F This method frees the INTERFACE material data for a given material.
%i Material descriptor.
*/
static void InterfaceFree( sMaterial *mat )
{
 sIntfData *data = 0L;

/* Get INTERFACE material data
 */
 data = (sIntfData *)mat->data;

/* Release allocated memory
 */
 free( data );

/* Reset material data
 */
 mat->data = 0L;

} /* End of InterfaceFree */


/*
%F This method reads the INTERFACE material information.
%i Material descriptor.
*/
static void InterfaceRead( sMaterial *mat )
{
 sIntfData *data = 0L;
 double     ks, kn;

/* Get the material data
 */
 data = (sIntfData *)mat->data;

/* Read the material parameters
 */
 fscanf( nf, "%lf %lf", &kn, &ks );

/* Fill material information
 */
 data->Ks = ks;
 data->Kn = kn;

} /* End of InterfaceRead */


/*
%F
*/
static void InterfaceEParameter( sMaterial *mat, double *ks )
{
 sIntfData *data = 0L;

/* Get material descriptor
 */ 
 data = (sIntfData *)mat->data;

/* Get Young modules parameters
 */
 (*ks) = data->Ks;

} /* End of InterfaceEParameter */


/*
%F
*/
static void InterfaceNuParameter( sMaterial *mat, double *kn )
{
 sIntfData *data = 0L;

/* Get material descriptor
 */ 
 data = (sIntfData *)mat->data;

/* Get Poisson coefficient parameters
 */
 (*kn) = data->Kn;

} /* End of InterfaceNuParameter */


/*
%F This function computes the material constitutive matrix
*/
static void InterfaceCMatrix( sMaterial *mat, double cm[6][6] )
{
 int        i, j;
 sIntfData *data = 0L;
 double     ks, kn;

/* Intialize matrix
 */
 for( i = 0; i < 6; i++ )
  for( j = 0; j < 6; j++ )
   cm[i][j] = 0.0;

/* Get material descriptor
 */
 data = (sIntfData *)mat->data;

/* Get element parameters
 */
 ks = data->Ks;
 kn = data->Kn;

/* Compute matrix elements
 */
 if( NDof == 2 )
 {
  cm[0][0] = ks;
  cm[1][1] = kn;
 }
 else
 {
  cm[0][0] = ks;
  cm[1][1] = kn;
  cm[2][2] = kn;
 }
 
} /* End of InterfaceCMatrix */


/*
** ------------------------------------------------------------------------
** Public functions:
*/

/*
%F This function initializes the sub-class "INTERFACE".
*/
void InterfaceMatInit( void );
void InterfaceMatInit( void )
{
/* Initialize INTERFACE material sub-class
 */
 MatClass[INTERFACE_MAT].new       = InterfaceNew;
 MatClass[INTERFACE_MAT].free      = InterfaceFree;
 MatClass[INTERFACE_MAT].read      = InterfaceRead;
 MatClass[INTERFACE_MAT].epar      = InterfaceEParameter;
 MatClass[INTERFACE_MAT].nupar     = InterfaceNuParameter;
 MatClass[INTERFACE_MAT].cmatrix   = InterfaceCMatrix;
 MatClass[INTERFACE_MAT].updatestr = 0L;
 MatClass[INTERFACE_MAT].updatepar = 0L;
 MatClass[INTERFACE_MAT].timestep  = 0L;
 MatClass[INTERFACE_MAT].density   = MaterialDensity;
 MatClass[INTERFACE_MAT].vstrain   = 0L;

} /* End of InterfaceMatInit */


/* =======================================================  End of File  */

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