mtheta.F

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!||====================================================================
!||    mtheta   ../engine/source/materials/mat_share/mtheta.F
!||--- called by ------------------------------------------------------
!||    mmain    ../engine/source/materials/mat_share/mmain.F90
!||====================================================================
      SUBROUTINE mtheta(
     1   PM,      EINT,    THETA,   AMU,
     2   C1,      C2,      DF,      PSH,
     3   PC,      MAT,     NEL)
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#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 MAT(*)
C     REAL
      my_real
     .   pm(npropm,*), eint(*), theta(*),
     .   amu(*), c1(*), c2(*), df(*), psh(*), pc(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I,MX
      my_real EINT0, SPH, DMU, PLIM, C2MU, C1PSH, ECOLD      
C=======================================================================
      mx = mat(1)
      DO i=1,nel
       sph     =pm(69,mx)
       eint0   =pm(23,mx)
       theta(i)=pm(79,mx)
       plim    =pc(i)-c1(i)-psh(i)
       IF(c2(i)>abs(plim/ep36))THEN
         dmu = min(amu(i)-plim/c2(i),zero)
       ELSE
         dmu =zero
       ENDIF
C
       c2mu    =c2(i)*amu(i)
       c1psh   =c1(i)+psh(i)
C              ENERGIE ELASTIQUE
       ecold   =(c1psh + half*c2mu)*amu(i)
C              ENERGIE DE RUPTURE EN TRITENSION (OU CAVITATION)
C              HYP: NE CREEE PAR D'ECHAUFFEMENT
       ecold   =ecold + half*dmu*(c1psh+c2mu-pc(i))
C              ENERGIE INITIALE
       ecold   =ecold+eint0
       theta(i)=theta(i) + (eint(i)*df(i)-ecold)/sph
      ENDDO
c-----------
      RETURN
      END