prodATA.F

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C This subroutines computes C(NEL,3,3) which is the product [C] = [A]t[A]
!||====================================================================
!||    prodata     ../engine/source/materials/tools/prodATA.F
!||--- called by ------------------------------------------------------
!||    sigeps190   ../engine/source/materials/mat/mat190/sigeps190.F
!||====================================================================
      SUBROUTINE prodata(A, C, E, NEL)
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
      INTEGER,  INTENT(IN) ::  NEL
      my_real,  DIMENSION(NEL,3, 3),INTENT(IN) ::  a
      my_real,  DIMENSION(NEL,3, 3),INTENT(OUT) :: c 
      my_real,  DIMENSION(NEL,6)   ,INTENT(OUT) :: e 
C
      INTEGER  I
C-----------------------------------------------
      DO i =1, nel    
C           
        ! Computation of Ft * F           
        c(i,1,1) = a(i,1,1)**2 + a(i,2,1)**2 + a(i,3,1)**2
        c(i,2,2) = a(i,1,2)**2 + a(i,2,2)**2 + a(i,3,2)**2
        c(i,3,3) = a(i,1,3)**2 + a(i,2,3)**2 + a(i,3,3)**2
 
        c(i,1,2) = a(i,1,1)*a(i,1,2) + a(i,2,1)*a(i,2,2) + a(i,3,1)*a(i,3,2)
        c(i,1,3) = a(i,1,1)*a(i,1,3) + a(i,2,1)*a(i,2,3) + a(i,3,1)*a(i,3,3)
        c(i,2,3) = a(i,1,2)*a(i,1,3) + a(i,2,2)*a(i,2,3) + a(i,3,2)*a(i,3,3)
 
        c(i,2,1) = c(i,1,2) 
        c(i,3,1) = c(i,1,3) 
        c(i,3,2) = c(i,2,3) 
C
        ! Computation of Green-Lagrange tensor
        e(i,1) = (c(i,1,1) - one) /two
        e(i,2) = (c(i,2,2) - one) /two
        e(i,3) = (c(i,3,3) - one) /two
        e(i,4) =  c(i,1,2) /two
        e(i,5) =  c(i,2,3) /two
        e(i,6) =  c(i,1,3) /two
C
      ENDDO                                             
C
      RETURN
      END