therm3c.F

Go to the documentation of this file.

Copyright>        OpenRadioss
Copyright>        Copyright (C) 1986-2025 Altair Engineering Inc.
Copyright>
Copyright>        This program is free software: you can redistribute it and/or modify
Copyright>        it under the terms of the GNU Affero General Public License as published by
Copyright>        the Free Software Foundation, either version 3 of the License, or
Copyright>        (at your option) any later version.
Copyright>
Copyright>        This program is distributed in the hope that it will be useful,
Copyright>        but WITHOUT ANY WARRANTY; without even the implied warranty of
Copyright>        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Copyright>        GNU Affero General Public License for more details.
Copyright>
Copyright>        You should have received a copy of the GNU Affero General Public License
Copyright>        along with this program.  If not, see <https://www.gnu.org/licenses/>.
Copyright>
Copyright>
Copyright>        Commercial Alternative: Altair Radioss Software
Copyright>
Copyright>        As an alternative to this open-source version, Altair also offers Altair Radioss
Copyright>        software under a commercial license.  Contact Altair to discuss further if the
Copyright>        commercial version may interest you: https://www.altair.com/radioss/.
!||====================================================================
!||    therm3c       ../engine/source/elements/sh3n/coque3n/therm3c.F
!||--- called by ------------------------------------------------------
!||    c3forc3       ../engine/source/elements/sh3n/coque3n/c3forc3.F
!||    c3forc3_crk   ../engine/source/elements/xfem/c3forc3_crk.F
!||====================================================================
      SUBROUTINE therm3c(NEL   ,PM    ,THK   ,IXTG   , 
     2                   PX1   ,PY1   ,PY2   ,AREA   ,DT     ,
     3                   TEMPNC,TEMPEL,DHEAT ,FPHI   ,THEACCFACT)
C-----------------------------------------------
C  calculates nodal thermic force from heat energy increment
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   G l o b a l   P a r a m e t e r s
C-----------------------------------------------
#include      "mvsiz_p.inc"
#include      "param_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER, INTENT(IN) :: NEL 
      INTEGER, INTENT(IN) :: IXTG(NIXTG,*)
      my_real ,INTENT(IN) :: theaccfact
      my_real ,INTENT(IN) :: dt
      my_real :: area(nel), px1(mvsiz),py1(mvsiz), py2(mvsiz),
     .   tempnc(*), fphi(mvsiz,3), pm(*),dheat(nel),
     .   thk(nel),tempel(nel)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER :: I
      my_real :: CA,CB ,KC,PHIX,PHIY,A
!===========================================================================
        ca = pm(75)
        cb = pm(76)
!
        DO i=1,nel
cc          ! element form functions
cc          PX1(I) = HALF*(X(2,IXTG(3,I)) - X(2,IXTG(4,I)))/AREA(I)
cc          PX2(I) = HALF*(X(2,IXTG(4,I)) - X(2,IXTG(2,I)))/AREA(I)
cc          PY1(I) = HALF*(X(1,IXTG(4,I)) - X(1,IXTG(3,I)))/AREA(I)
cc          PY2(I) = HALF*(X(1,IXTG(2,I)) - X(1,IXTG(4,I)))/AREA(I)
          
          kc = (ca + cb*tempel(i))*dt / max(em20,area(i))*theaccfact
          phix =  tempnc(ixtg(2,i))*px1(i) - tempnc(ixtg(3,i))*px1(i)
          
          phiy =  tempnc(ixtg(2,i))*py1(i)  + tempnc(ixtg(3,i))*py2(i) -
     .            tempnc(ixtg(4,i))*(py1(i) + py2(i))
C     
          phix = kc*phix*thk(i)
          phiy = kc*phiy*thk(i)
C
C         nodal thermal force (flux)
C
          a = third * dheat(i)
          fphi(i,1) = a - phix*px1(i) - phiy*py1(i)
          fphi(i,2) = a + phix*px1(i) - phiy*py2(i)
          fphi(i,3) = a + phiy*(py1(i)+py2(i))
       ENDDO
!------------       
      RETURN
      END