dt1lawt.F

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!||====================================================================
!||    dt1lawt   ../starter/source/elements/truss/dt1lawt.F
!||--- called by ------------------------------------------------------
!||    tinit3    ../starter/source/elements/truss/tinit3.F
!||====================================================================
      SUBROUTINE dt1lawt(PM, DELTAX, MAT, MXG, DTX)
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"
#include      "vect01_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
C     REAL
      my_real
     .   pm(npropm,*), deltax(*), dtx(*)
      INTEGER MAT(*), MXG(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I, MX
C     REAL
      my_real
     .   rho0, e, c1, ssp, c, 
     .   iyy, izz
C
C
      DO 10 i=lft,llt
         mx     =mat(i)
         rho0   =pm( 1,mx)
         e      =pm(20,mx)
         ssp    =sqrt(e/rho0)
         dtx(i) =deltax(i) / max(em20,ssp)
 10   CONTINUE
C
      RETURN
      END