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REAL*8 AINTW(NNODE),XII(NNODE,2),XI(2),dNdxi(NNODE,2),
1 VJACOB(2,2),dNdx(NNODE,2),VJABOBINV(2,2),AN(4),BP(2,NDOFEL),
2 DP(2),SDV(NSTV),BB(3,NDOFEL),CMAT(3,3),EPS(3),STRESS(3),
3 VNI(2,NDOFEL),ULOC(2),PHASENOD(NNODE)
REAL*8 DTM,THCK,HIST,CLPAR,GCPAR,EMOD,ENU,PARK,ENG
COMMON/KUSER/USRVAR(N_ELEM,NSTV,4)
C
C ==================================================================
C ******************************************************************
C Constructing elemet TYPE 1 (phase)
C ******************************************************************
C ==================================================================
C
IF (JTYPE.EQ.ONE) THEN
C ==================================================================
C Time an iteration variables
C ==================================================================
TIMEZ=USRVAR(JELEM,17,1)
IF (TIMEZ.LT.TIME(2)) THEN
USRVAR(JELEM,17,1)=TIME(2)
USRVAR(JELEM,18,1)=ZERO
ELSE
USRVAR(JELEM,18,1)=USRVAR(JELEM,18,1)+ONE
ENDIF
STEPITER=USRVAR(JELEM,18,1)
common是怎么使用?