visc_et.F

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!||====================================================================
!||    visc_et          ../engine/source/elements/solid/solidez/visc_et.F
!||--- called by ------------------------------------------------------
!||    szforc3          ../engine/source/elements/solid/solidez/szforc3.F
!||--- uses       -----------------------------------------------------
!||    visc_param_mod   ../common_source/modules/mat_elem/visc_param_mod.F90
!||====================================================================
      SUBROUTINE visc_et(NEL ,VISC ,RHO ,NU ,CXX ,ET )
C-----------------------------------------------
C   M o d u l e s
C-----------------------------------------------
      USE visc_param_mod
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER ,INTENT(IN)  :: NEL
      my_real ,INTENT(IN)  :: rho,nu
      my_real ,INTENT(IN)  :: cxx(nel)
      my_real ,INTENT(OUT) :: et(nel)
      TYPE(visc_param_) ,INTENT(IN) :: VISC
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER :: I,NPRONY
      my_real :: gg,gv,gv_max,nu1
C=======================================================================        
      nprony = visc%IPARAM(1)
      et(:)  = zero
      gv  = zero
      DO i= 1,nprony                                  
       gv = gv + visc%UPARAM(1 + i)
      ENDDO
C
      gv_max = third*(one+nu)/(one -two*nu)
      nu1    = rho * (one -two*nu)/(one-nu)
C
      DO i=1,nel
        gg   = cxx(i)*cxx(i)*nu1    
        et(i)= et(i) + min(gv_max,gv/gg)
      ENDDO
C------------
      RETURN
      END