q4plate.h

Finite element program for mechanical problem. It can solve various problem in solid problem

#ifndef q4plate_H
#define q4plate_H

#include "alias.h"
struct matrix;
struct vector;
struct ivector;

/**
   this class defines rectangular plate element based on Mindlin theory
   shear stresses are taken into account
   
   approximated functions are ordered in the following way:
   w,fx,fy
   
   PF
*/
class q4plate
{
 public:
  q4plate (void);
  ~q4plate (void);
  void eleminit (long eid);
  double approx (double xi,double eta,vector &nodval);
  void atd_matrix (matrix &atd,vector &x,vector &y,long eid);
  void bf_matrix (matrix &n,matrix &atd,vector &x,vector &y,vector &l);
  void geom_matrix_bending (matrix &gm,matrix &atd,vector &x,vector &y,vector &l);
  void geom_matrix_shear (matrix &gm,matrix &atd,vector &x,vector &y,vector &l);
  void dmatblock (matrix &dd,matrix &d,long ri, long ci, double t);
  void transfmat (ivector &nodes,matrix &tmat);
  void stiffness_matrix (long eid,long ri,long ci, matrix &sm,vector &x, vector &y);
  void res_stiffness_matrix (long eid,matrix &sm);
  void initstr_matrix (long eid,long ri,long ci,matrix &ism);
  void load_matrix (long eid,matrix &lm);

  void appval (double xi,double eta,long fi,long nc,vector &eps,double **val);

  void res_ip_strains (long lcid,long eid);
  void ip_strains (long lcid,long eid,long ri,long ci,vector &x,vector &y,vector &r);
  void nod_strains_ip (long lcid,long eid,long ri,long ci);
  void strains (long lcid,long eid,long ri,long ci);

  void res_ip_stresses (long lcid,long eid);
  void ip_stresses (long lcid,long eid,long ri,long ci);
  void nod_stresses_ip (long lcid,long eid,long ri,long ci);
  void stresses (long lcid,long eid,long ri,long ci);

  void res_internal_forces (long lcid,long eid,vector &ifor);
  void internal_forces (long lcid,long eid,long ri,long ci,vector &ifor,vector &x,vector &y);

  
  void areaforces (long eid,double *nv,vector &lm);
  void inicipval(long eid, long ri, long ci, matrix &nodval, inictype *ictn);


  //  number of DOFs on the element
  long ndofe;
  //  number of nodes on one element
  long nne;
  //  total number of components of stress and strain tensors
  long tncomp;
  ///  total number of integration points on element
  long tnip;
  //  number of components of stress and strain tensors
  long *ncomp;
  //  array containing cumulative numbers of components of stress and strain tensors
  long *cncomp;
  //  number of approximated functions on the element
  long napfun;
  //  number of edges on one element
  long ned;
  //  number of nodes on one edge
  long nned;
  //  array of orders of integration of stiffness matrix
  long **intordsm;
  //  order of integration for mass matrix
  long intordmm;
  //  order of integration on edges
  long intordb;
  //  array of numbers of integration points in sets
  long **nip;
  //  number of blocks
  long nb;
  //  stress/strain state
  strastrestate ssst;
};

#endif