m38init.F

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!||====================================================================
!||    m38init   ../starter/source/materials/mat/mat038/m38init.F
!||--- called by ------------------------------------------------------
!||    matini    ../starter/source/materials/mat_share/matini.f
!||    sigin3b   ../starter/source/elements/solid/solid8p/sigin3b.F
!||--- calls      -----------------------------------------------------
!||    finter    ../starter/source/tools/curve/finter.f
!||====================================================================
      SUBROUTINE m38init(
     1      NEL    , NUPARAM, NUVAR   , NFUNC  , IFUNC  , NPF   ,
     2      TF     , UPARAM , RHO0    , VOLUME , EINT   ,UVAR   ) 
C-----------------------------------------------
C   I M P L I C I T   T Y P E S
C-----------------------------------------------
#include "implicit_f.inc"
C---------+---------+---+---+--------------------------------------------
C VAR     | SIZE    |TYP| RW| DEFINITION
C---------+---------+---+---+--------------------------------------------
C NEL     |  1      | I | R | SIZE OF THE ELEMENT GROUP NEL 
C NUPARAM |  1      | I | R | SIZE OF THE USER PARAMETER ARRAY
C NUVAR   |  1      | I | R | NUMBER OF USER ELEMENT VARIABLES
C---------+---------+---+---+--------------------------------------------
C NFUNC   |  1      | I | R | NUMBER FUNCTION USED FOR THIS USER LAW
C IFUNC   | NFUNC   | I | R | FUNCTION INDEX 
C NPF     |  *      | I | R | FUNCTION ARRAY   
C TF      |  *      | F | R | FUNCTION ARRAY 
C---------+---------+---+---+--------------------------------------------
C UPARAM  | NUPARAM | F | R | USER MATERIAL PARAMETER ARRAY
C RHO0    | NEL     | F | R | INITIAL DENSITY
C VOLUME  | NEL     | F | R | VOLUME
C EINT    | NEL     | F | R | TOTAL INTERNAL ENERGY
C---------+---------+---+---+--------------------------------------------
C UVAR    |NEL*NUVAR| F |R/W| USER ELEMENT VARIABLE ARRAY
C---------+---------+---+---+--------------------------------------------
C----------------------------------------------------------------
C  I N P U T   A R G U M E N T S
C----------------------------------------------------------------
      INTEGER       NEL, NUPARAM, NUVAR
      my_real
     .      uparam(nuparam), rho0(nel), volume(nel), eint(nel)
C----------------------------------------------------------------
C  I N P U T  O U T P U T   A R G U M E N T S
C----------------------------------------------------------------
      my_real
     . uvar(nel,nuvar)
C----------------------------------------------------------------
C  VARIABLES FOR FUNCTION INTERPOLATION 
C----------------------------------------------------------------
      INTEGER NPF(*), NFUNC, IFUNC(NFUNC)
      my_real
     .   finter,tf(*)
      EXTERNAL finter
C----------------------------------------------------------------
C  L O C A L  V A R I B L E S
C----------------------------------------------------------------
      INTEGER          MFUNC,IUNLOAD,NUPARAM0,IFLAG,ITOTAL,IMSTA,
     .                 NFUNC1,NFUNCUL,NFUNCP,KCOMPAIR,KRECOVER,KDECAY
      INTEGER          I, J
C     REAL
      my_real
     .   decay,tensioncut,tolerance,lamda,efinal,epsfin,
     .   e0,vt,vc,rv,beta,hyster,
     .   ratedamp,theta,p0,relaxp,maxpres,phi,
     .   gamma,viscosity,exponas,exponbs,funload,runload,
     .   pscale   
C=======================================================================
C SET INITIAL MATERIAL CONSTANTS
 
      nuparam0= uparam(1)
 
      e0        = uparam(2)
      vt        = uparam(3)
      vc        = uparam(4)
      rv        = uparam(5)
      iflag     = uparam(6)
      itotal    = uparam(7)
 
      beta      = uparam(8)
      hyster    = uparam(9)
      ratedamp  = uparam(10)
      krecover  = uparam(11)
      kdecay    = uparam(12)
      theta     = uparam(13)
 
      kcompair  = uparam(14)
      p0        = uparam(15)
      gamma     = uparam(16)
      relaxp    = uparam(17)
      maxpres   = uparam(18)
      phi       = uparam(19)
 
      iunload   = uparam(20)
      funload   = uparam(21)
      runload   = uparam(22)
      exponas   = uparam(23)
      exponbs   = uparam(24)
 
      mfunc     = uparam(25)
      imsta     = uparam(26)
      tensioncut= uparam(27)
 
      efinal    = uparam(28)
      epsfin    = uparam(29)
      lamda     = uparam(30)
      viscosity = uparam(31)
      tolerance = uparam(32)
      pscale    = uparam(33)
      nfunc1=(nfunc-2)/2
* unloading function number
      nfuncul=nfunc-1
* function number for enclosed air pressure
      nfuncp=nfunc
 
C......................................................................
C INITIALIZE
      DO i=1,nel
C STRAIN(1-3),STRESS(4-6),STRAIN RATE(7-9)
        DO j=1,9
          uvar(i,j)=zero
        ENDDO
C MODULE (EYN INITIALIZED TO E0)
        DO j=10,12
          uvar(i,j)=e0
        ENDDO
C POISSON'S RATIO/MODULE
        DO j=13,15
          uvar(i,j)=vt/e0
        ENDDO
C PRESSURE
        uvar(i,16)=zero
C PRINCIPAL DIRECTIONS
        DO j=17,25
          uvar(i,j)=zero
        ENDDO
        uvar(i,17)=one
        uvar(i,21)=one
        uvar(i,25)=one
C LAW STORAGE FOR DECAY AND HYSTERESIS
        DO j=26,31
          uvar(i,j)=zero
        ENDDO
      ENDDO
 
      RETURN
      END