linhex_8ip.cpp

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

  case nowhere:{
    break;
  }
  case intpts:{
    allip_stresses (stre,lcid,eid,ri,ci);
    break;
  }
  case enodes:{
    break;
  }
  case userdefined:{
    //  number of auxiliary element points
    naep = Mm->stre.give_naep (eid);
    ncp = Mm->stre.give_ncomp (eid);
    sid = Mm->stre.give_sid (eid);
    allocv (ncp,sig);
    allocv (3,coord);
    for (i=0;i<naep;i++){
      Mm->stre.give_aepcoord (sid,i,coord);

      if (Mp->stressaver==0)
	appval (coord[0],coord[1],coord[2],0,ncp,sig,stre);
      if (Mp->stressaver==1)
	appstress (lcid,eid,coord[0],coord[1],coord[2],0,ncp,sig);
      
      Mm->stre.storevalues(lcid,eid,i,sig);
    }
    destrv (sig);
    destrv (coord);
    break;
  }
  default:{
    fprintf (stderr,"\n\n unknown stress point is required in function planeelemlq::stresses (%s, line %d).\n",__FILE__,__LINE__);
  }
  }

  if (Mp->stressaver==0){
    for (i=0;i<nne;i++){
      delete [] stra[i];
      delete [] stre[i];
    }
    delete [] stra;
    delete [] stre;
  }
}











void linhex::res_temp_forces (long lcid,long eid,vector &nfor)
{
  temp_forces (lcid,eid,0,0,nfor);
}

/**
   function computes nodal forces caused by temperature changes
   
   @param eid - element id
   @param ri,ci - row and column indices
   @param nfor - array containing nodal forces
   
   30.11.2002, JK
*/
void linhex::temp_forces (long lcid,long eid,long ri,long ci,vector &nfor)
{
  long i,j,k,l,ii,ipp;
  double xi,eta,zeta,jac;
  ivector nodes(nne);
  vector x(nne),y(nne),z(nne),eps,sig,contr(ndofe),t(nne),epst(tncomp),gp,w;
  matrix d(tncomp,tncomp),gm;
  
  Mt->give_elemnodes (eid,nodes);
  Mt->give_node_coord3d (x,y,z,eid);
  
  fillv (0.0,nfor);

  for (ii=0;ii<nb;ii++){
    
    allocv (intordsm[ii][ii],w);
    allocv (intordsm[ii][ii],gp);
    
    allocm (ncomp[ii],ndofe,gm);
    allocv (ncomp[ii],eps);
    allocv (ncomp[ii],sig);
    
    gauss_points (gp.a,w.a,intordsm[ii][ii]);
    
    ipp=Mt->elements[eid].ipp[ri+ii][ci+ii];
    for (i=0;i<intordsm[ii][ii];i++){
      xi=gp[i];
      for (j=0;j<intordsm[ii][ii];j++){
	eta=gp[j];
	for (k=0;k<intordsm[ii][ii];k++){
	  zeta=gp[k];
	  tempstrains (lcid,eid,ipp,xi,eta,zeta,epst);
	  extract (eps,epst,cncomp[ii],ncomp[ii]);
	  
	  Mm->matstiff (d,ipp);
	  ipp++;
	  
	  mxv (d,eps,sig);
	  geom_matrix (gm,x,y,z,xi,eta,zeta,jac);
	  mtxv (gm,sig,contr);
	  cmulv (jac*w[i]*w[j]*w[k],contr);
	  
	  for (l=0;l<contr.n;l++){
	    nfor[l]+=contr[l];
	  }
	}
      }
    }
    destrv (sig);  destrv (eps);  destrv (gp);  destrv (w);
    destrm (gm);
  }
}

/**
   function computes nodal forces caused by temperature changes
   
   @param eid - element id
   @param ri,ci - row and column indices
   @param nfor - array containing nodal forces
   
   30.11.2002, JK
*/
void linhex::temperaturestrains (long lcid,long eid,long ri,long ci)
{
  long i,j,k,ii,ipp;
  double xi,eta,zeta;
  vector epst(tncomp),gp,w;
  
  for (ii=0;ii<nb;ii++){
    
    allocv (intordsm[ii][ii],w);
    allocv (intordsm[ii][ii],gp);
    
    gauss_points (gp.a,w.a,intordsm[ii][ii]);
    
    ipp=Mt->elements[eid].ipp[ri+ii][ci+ii];
    for (i=0;i<intordsm[ii][ii];i++){
      xi=gp[i];
      for (j=0;j<intordsm[ii][ii];j++){
	eta=gp[j];
	for (k=0;k<intordsm[ii][ii];k++){
	  zeta=gp[k];

	  tempstrains (lcid,eid,ipp,xi,eta,zeta,epst);

	  ipp++;
	}
      }
    }
    destrv (gp);  destrv (w);
  }
}


/**
   function computes strains caused by temperature changes
   
   @param lcid - load case id
   @param eid - element id
   @param ipp - integration point pointer
   @param xi,eta,zeta - natural coordinates
   @param eps - array containing strains
   
   30.11.2002, JK
*/
void linhex::tempstrains (long lcid,long eid,long ipp,double xi,double eta,double zeta,vector &eps)
{
  double temp;
  ivector nodes(nne);
  vector dt(nne),tvect(tncomp);
  matrix d(tncomp,tncomp);

  Mt->give_elemnodes (eid,nodes);
  Mb->lc[lcid].tempchanges (dt.a,nodes);

  temp = approx (xi,eta,zeta,dt);
  fillv (temp,tvect);
  
  Mm->matdilat (d,ipp);
  mxv (d,tvect,eps);
  
  Mm->storeeigstrain (ipp,eps);
}

/**
   function computes internal forces

   @param lcid - number of load case
   @param eid - element id
   @param ri,ci - row and column indices
   @param ifor - vector of internal forces
   
   28.7.2001
*/
void linhex::internal_forces (long lcid,long eid,long ri,long ci,vector &ifor)
{
  long i,j,k,l,ii,ipp;
  double xi,eta,zeta,jac;
  ivector nodes(nne),cn(ndofe);
  vector x(nne),y(nne),z(nne),w,gp,r(ndofe),eps(tncomp),sig,contr(ndofe);
  matrix gm;

  Mt->give_node_coord3d (x,y,z,eid);
  Mt->give_code_numbers (eid,cn.a);
  eldispl (lcid,r.a,cn.a,ndofe);
  
  fillv (0.0,ifor);
  
  for (ii=0;ii<nb;ii++){
    if (intordsm[ii][ii]==0)  continue;
    
    allocv (intordsm[ii][ii],gp);
    allocv (intordsm[ii][ii],w);
    allocm (ncomp[ii],ndofe,gm);
    allocv (ncomp[ii],sig);
    
    gauss_points (gp.a,w.a,intordsm[ii][ii]);
    ipp=Mt->elements[eid].ipp[ri+ii][ci+ii];
    
    for (i=0;i<intordsm[ii][ii];i++){
      xi=gp[i];
      for (j=0;j<intordsm[ii][ii];j++){
	eta=gp[j];
	for (k=0;k<intordsm[ii][ii];k++){
	  zeta=gp[k];
	  
	  geom_matrix (gm,x,y,z,xi,eta,zeta,jac);
	  
	  mxv (gm,r,eps);
	  
	  Mm->storestrain (lcid,ipp,eps);
	  
	  Mm->computenlstresses (ipp);
	  
	  Mm->givestress (lcid,ipp,cncomp[ii],ncomp[ii],sig);
	  
	  geom_matrix (gm,x,y,z,xi,eta,zeta,jac);
	  mtxv (gm,sig,contr);
	  
	  cmulv (jac*w[i]*w[j]*w[k],contr);
	  
	  for (l=0;l<contr.n;l++){
	    ifor[l]+=contr[l];
	  }
	  
	  ipp++;
	}
      }
    }
    destrv (sig);  destrm (gm);  destrv (w);  destrv (gp);
  }

}

void linhex::res_internal_forces (long lcid,long eid,vector &ifor)
{
  internal_forces (lcid,eid,0,0,ifor);
}

/**
   function computes internal forces

   @param lcid - number of load case
   @param eid - element id
   @param ri,ci - row and column indices
   @param ifor - vector of internal forces
   
   28.7.2001
*/
void linhex::local_values (long lcid,long eid,long ri,long ci)
{
  long i,j,k,ii,ipp;
  double xi,eta,zeta;
  double **stra;
  vector w,gp,eps(tncomp);
  matrix gm;

  stra = new double* [nne];
  for (i=0;i<nne;i++){
    stra[i] = new double [tncomp];
  }
  elem_strains (stra,lcid,eid,ri,ci);

  for (ii=0;ii<nb;ii++){
    if (intordsm[ii][ii]==0)  continue;

    allocv (intordsm[ii][ii],gp);
    allocv (intordsm[ii][ii],w);
    
    gauss_points (gp.a,w.a,intordsm[ii][ii]);
    ipp=Mt->elements[eid].ipp[ri+ii][ci+ii];
    
    for (i=0;i<intordsm[ii][ii];i++){
      xi=gp[i];
      for (j=0;j<intordsm[ii][ii];j++){
	eta=gp[j];
	for (k=0;k<intordsm[ii][ii];k++){
	  zeta=gp[k];
	  
	  appval (xi,eta,zeta,0,tncomp,eps,stra);
	  
	  Mm->storestrain (lcid,ipp,eps);
	  
	  Mm->computenlstresses (ipp);
	  
	  ipp++;
	}
      }
    }
    destrv (w);  destrv (gp);
  }

  for (i=0;i<nne;i++){
    delete [] stra[i];
  }
  delete [] stra;
}


/**
   function computes internal forces

   @param lcid - number of load case
   @param eid - element id
   @param ri,ci - row and column indices
   @param ifor - vector of internal forces
   
   28.7.2001
*/
void linhex::nonloc_internal_forces (long lcid,long eid,long ri,long ci,vector &ifor)
{
  long i,j,k,l,ii,ipp;
  double xi,eta,zeta,jac;
  vector x(nne),y(nne),z(nne),w,gp,sig,contr(ndofe);
  matrix gm;


  Mt->give_node_coord3d (x,y,z,eid);
  
  fillv (0.0,ifor);

  for (ii=0;ii<nb;ii++){
    if (intordsm[ii][ii]==0)  continue;

    allocv (intordsm[ii][ii],gp);
    allocv (intordsm[ii][ii],w);
    allocm (ncomp[ii],ndofe,gm);
    allocv (ncomp[ii],sig);
    
    gauss_points (gp.a,w.a,intordsm[ii][ii]);
    ipp=Mt->elements[eid].ipp[ri+ii][ci+ii];
    
    for (i=0;i<intordsm[ii][ii];i++){
      xi=gp[i];
      for (j=0;j<intordsm[ii][ii];j++){
	eta=gp[j];
	for (k=0;k<intordsm[ii][ii];k++){
	  zeta=gp[k];
	  
	  Mm->compnonloc_nlstresses (ipp);
	  
	  Mm->givestress (lcid,ipp,cncomp[ii],ncomp[ii],sig);
	  
	  geom_matrix (gm,x,y,z,xi,eta,zeta,jac);
	  mtxv (gm,sig,contr);
	  
	  cmulv (jac*w[i]*w[j]*w[k],contr);
	  
	  for (l=0;l<contr.n;l++){
	    ifor[l]+=contr[l];
	  }
	  
	  ipp++;
	}
      }
    }
    destrv (sig);  destrm (gm);  destrv (w);  destrv (gp);
  }

}


/**
   function returns coordinates of integration points
   
   @param eid - element id
   @param ipp - integration point pointer
   @param coord - vector of coordinates
   
   10.1.2002
*/
void linhex::ipcoord (long eid,long ipp,long ri,long ci,vector &coord)
{
  long i,j,k,ii;
  double xi,eta,zeta;
  vector x(nne),y(nne),z(nne),w(intordsm[ri][ci]),gp(intordsm[ri][ci]);
  
  gauss_points (gp.a,w.a,intordsm[ri][ci]);
  Mt->give_node_coord3d (x,y,z,eid);
  ii=Mt->elements[eid].ipp[ri][ci];
  
  for (i=0;i<intordsm[ri][ci];i++){
    xi=gp[i];
    for (j=0;j<intordsm[ri][ci];j++){
      eta=gp[j];
      for (k=0;k<intordsm[ri][ci];k++){
	zeta=gp[k];
	if (ii==ipp){
	  coord[0]=approx (xi,eta,zeta,x);
	  coord[1]=approx (xi,eta,zeta,y);
	  coord[2]=approx (xi,eta,zeta,z);
	}
	ii++;
      }
    }
  }
}



void linhex::inicipval(long eid, long ri, long ci, matrix &nodval, inictype *ictn)
{
  long i, j, k, l, m, ipp;
  long ii, jj, nv = nodval.n;
  long nstra;
  double xi, eta, zeta, ipval;
  vector w, gp, anv(nne);

  nstra = 0;
  for (j = 0; j < nv; j++) // for all initial values
  {
    for(i = 0; i < nne; i++) // for all nodes on element
      anv[i] = nodval[i][j];
    for (ii = 0; ii < nb; ii++)
    {
      for (jj = 0; jj < nb; jj++)
      {
        ipp=Mt->elements[eid].ipp[ri+ii][ci+jj];
        if (intordsm[ii][jj] == 0)
          continue;
        allocv (intordsm[ii][jj],gp);
        allocv (intordsm[ii][jj],w);
        gauss_points (gp.a,w.a,intordsm[ii][jj]);
        for (k = 0; k < intordsm[ii][jj]; k++)
        {
          xi=gp[k];
          for (l = 0; l < intordsm[ii][jj]; l++)
          {
            eta=gp[l];
            for (m = 0; m < intordsm[ii][jj]; m++)
            {
              zeta=gp[m];
              //  value in integration point
              ipval = approx (xi,eta,zeta,anv);
              if ((ictn[i] & inistrain) && (j < Mm->ip[ipp].ncompstr))
              {
                Mm->ip[ipp].strain[j] += ipval;
                ipp++;
                continue;
              }
              if ((ictn[i] & inistress) && (j < nstra + Mm->ip[ipp].ncompstr))
              {
                Mm->ip[ipp].stress[j] += ipval;
                ipp++;
                continue;
              }
              if ((ictn[i] & iniother) && (j < nv))
              {
                Mm->ip[ipp].other[j] += ipval;
                ipp++;
                continue;
              }
              ipp++;
            }
          }
        }
        destrv (gp);  destrv (w);
      }
    }
    if (ictn[i] & inistrain) nstra++;
  }
}

/**
   function computes volume appropriate to integration point
   
   2.3.2004, JK
*/
void linhex::ipvolume (long eid,long ri,long ci)
{
  long i,j,k,ii,jj,ipp;
  double xi,eta,zeta,jac;
  vector x(nne),y(nne),z(nne),w,gp;
  
  Mt->give_node_coord3d (x,y,z,eid);
  
  for (ii=0;ii<nb;ii++){
    for (jj=0;jj<nb;jj++){
      if (intordsm[ii][jj]==0)  continue;

      allocv (intordsm[ii][jj],w);
      allocv (intordsm[ii][jj],gp);
      
      gauss_points (gp.a,w.a,intordsm[ii][jj]);
      
      ipp=Mt->elements[eid].ipp[ri+ii][ci+jj];
      
      for (i=0;i<intordsm[ii][jj];i++){
	xi=gp[i];
	for (j=0;j<intordsm[ii][jj];j++){
	  eta=gp[j];
	  for (k=0;k<intordsm[ii][jj];k++){
	    zeta=gp[k];
	    
	    jac_3d (jac,x,y,z,xi,eta,zeta);
	    jac=fabs(jac);
	    
	    jac*=w[i]*w[j]*w[k];
	    
	    Mm->storeipvol (ipp,jac);
	    ipp++;
	  }
	}
      }
      destrv (gp);  destrv (w);
    }
  }
  
}