sdlensh2.F

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!||====================================================================
!||    sdlensh2   ../engine/source/elements/thickshell/solidec/sdlensh2.F
!||--- called by ------------------------------------------------------
!||    s16forc3   ../engine/source/elements/thickshell/solide16/s16forc3.F
!||    scforc3    ../engine/source/elements/thickshell/solidec/scforc3.F
!||====================================================================
      SUBROUTINE sdlensh2(
     1   VOLN,    LLSH, AREA, X1,      X2,
     2   X3,      X4,      X5,      X6,
     3   X7,      X8,      Y1,      Y2,
     4   Y3,      Y4,      Y5,      Y6,
     5   Y7,      Y8,      Z1,      Z2,
     6   Z3,      Z4,      Z5,      Z6,
     7   Z7,      Z8,      NEL)
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"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER, INTENT(IN) :: NEL
      my_real, DIMENSION(MVSIZ) , INTENT(OUT)  :: AREA,LLSH 
      my_real, DIMENSION(MVSIZ) , INTENT(IN)  ::  
     .   VOLN,
     .   X1, X2, X3, X4, X5, X6, X7, X8,
     .   Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8,  
     .   Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I, J, N
      my_real
     .   RX(MVSIZ),RY(MVSIZ),RZ(MVSIZ),SX(MVSIZ),SY(MVSIZ),SZ(MVSIZ),
     .   XN(MVSIZ,4) , YN(MVSIZ,4) , ZN(MVSIZ,4) 
      my_real
     .   AL1,AL2,E3X,E3Y,E3Z,DET
C=======================================================================
        DO i=1,nel
          xn(i,1) = half*(x1(i)+x5(i))
          yn(i,1) = half*(y1(i)+y5(i))
          zn(i,1) = half*(z1(i)+z5(i))
          xn(i,2) = half*(x2(i)+x6(i))
          yn(i,2) = half*(y2(i)+y6(i))
          zn(i,2) = half*(z2(i)+z6(i))
          xn(i,3) = half*(x3(i)+x7(i))
          yn(i,3) = half*(y3(i)+y7(i))
          zn(i,3) = half*(z3(i)+z7(i))
          xn(i,4) = half*(x4(i)+x8(i))
          yn(i,4) = half*(y4(i)+y8(i))
          zn(i,4) = half*(z4(i)+z8(i))
        ENDDO 
C------g1,g2 :
        DO i=1,nel
          rx(i)=xn(i,2)+xn(i,3)-xn(i,1)-xn(i,4)
          ry(i)=yn(i,2)+yn(i,3)-yn(i,1)-yn(i,4)
          rz(i)=zn(i,2)+zn(i,3)-zn(i,1)-zn(i,4)
          sx(i)=xn(i,3)+xn(i,4)-xn(i,1)-xn(i,2)
          sy(i)=yn(i,3)+yn(i,4)-yn(i,1)-yn(i,2)
          sz(i)=zn(i,3)+zn(i,4)-zn(i,1)-zn(i,2)
        ENDDO 
        DO i=1,nel
          e3x = ry(i) * sz(i) - rz(i) * sy(i) 
          e3y = rz(i) * sx(i) - rx(i) * sz(i) 
          e3z = rx(i) * sy(i) - ry(i) * sx(i) 
          det = sqrt(e3x*e3x + e3y*e3y + e3z*e3z)
          area(i)=fourth*det
          al1 = rx(i)*rx(i) + ry(i)*ry(i)+ rz(i)*rz(i)
          al2 = sx(i)*sx(i) + sy(i)*sy(i)+ sz(i)*sz(i)
          llsh(i) = fourth*max(al1,al2)
        ENDDO 
C
      RETURN
      END