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- 1970-1-1
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有人能解释一下吗:
*deck,usermat parallel user gal
subroutine usermat(
& matId, elemId,kDomIntPt, kLayer, kSectPt,
& ldstep,isubst,keycut,
& nDirect,nShear,ncomp,nStatev,nProp,
& Time,dTime,Temp,dTemp,
& stress,statev,dsdePl,sedEl,sedPl,epseq,
& Strain,dStrain, epsPl, prop, coords,
& rotateM, defGrad_t, defGrad,
& tsstif, epsZZ,
& var1, var2, var3, var4, var5,
& var6, var7, var8)
c*************************************************************************
c *** primary function ***
c
c user defined material constitutive model
c
c Attention:
c User must define material constitutive law properly
c according to the stress state such as 3D, plain strain
c and axisymmetry, plane stress and 3D/1D beam.
c
c a 3D material constitutive model can use for
c plain strain and axisymmetry cases.
c
c When using shell elements, a plane stress algorithm
c must be use.
c
c gal July, 1999
c
c The following demonstrates a USERMAT subroutine for
c a plasticity model, which is the same as TB, BISO,
c for different stress states.
c See "ANSYS user material subroutine USERMAT" for detailed
c description of how to write a USERMAT routine.
c
c This routine calls four routines,
c usermat3d.F, usermatps.F usermatbm.F and usermat1d.F, w.r.t.
c the corresponding stress states.
c Each routine can be also a usermat routine for the specific
c element.
c
c*************************************************************************
c
c input arguments
c ===============
c matId (int,sc,i) material #
c elemId (int,sc,i) element #
c kDomIntPt (int,sc,i) "k"th domain integration point
c kLayer (int,sc,i) "k"th layer
c kSectPt (int,sc,i) "k"th Section point
c ldstep (int,sc,i) load step number
c isubst (int,sc,i) substep number
c nDirect (int,sc,in) # of direct components
c nShear (int,sc,in) # of shear components
c ncomp (int,sc,in) nDirect + nShear
c nstatev (int,sc,l) Number of state variables
c nProp (int,sc,l) Number of material ocnstants
c
c Temp (dp,sc,in) temperature at beginning of
c time increment
c dTemp (dp,sc,in) temperature increment
c Time (dp,sc,in) time at beginning of increment (t)
c dTime (dp,sc,in) current time increment (dt)
c
c Strain (dp,ar(ncomp),i) Strain at beginning of time increment
c dStrain (dp,ar(ncomp),i) Strain increment
c prop (dp,ar(nprop),i) Material constants defined by TB,USER
c coords (dp,ar(3),i) current coordinates
c rotateM (dp,ar(3,3),i) Rotation matrix for finite deformation update
c defGrad_t(dp,ar(3,3),i) Deformation gradient at time t
c defGrad (dp,ar(3,3),i) Deformation gradient at time t+dt
c
c input output arguments
c ======================
c stress (dp,ar(nTesn),io) stress
c statev (dp,ar(nstatev),io) statev
c sedEl (dp,sc,io) elastic work
c sedPl (dp,sc,io) plastic work
c epseq (dp,sc,io) equivalent plastic strain
c tsstif (dp,ar(2),io) transverse shear stiffness
c tsstif(1) - Gxz
c tsstif(2) - Gyz
c tsstif(1) is also used to calculate hourglass
c stiffness, this value must be defined when low
c order element, such as 181, 182, 185 with uniform
c integration is used.
c var? (dp,sc,io) not used, they are reserved arguments
c for further development
c
c output arguments
c ================
c keycut (int,sc,io) loading bisect/cut control
c 0 - no bisect/cut
c 1 - bisect/cut
c (factor will be determined by ANSYS solution control)
c dsdePl (dp,ar(ncomp,ncomp),io) material jacobian matrix
c epsZZ (dp,sc,o) strain epsZZ for plane stress,
c define it when accounting for thickness change
c in shell and plane stress states
c
c*************************************************************************
c
c ncomp 6 for 3D (nshear=3)
c ncomp 4 for plane strain or axisymmetric (nShear = 1)
c ncomp 3 for plane stress (nShear = 1)
c ncomp 3 for 3d beam (nShear = 2)
c ncomp 1 for 1D (nShear = 0)
c
c stresss and strains, plastic strain vectors
c 11, 22, 33, 12, 23, 13 for 3D
c 11, 22, 33, 12 for plane strain or axisymmetry
c 11, 22, 12 for plane stress
c 11, 13, 12 for 3d beam
c 11 for 1D
c
c material jacobian matrix
c 3D
c dsdePl | 1111 1122 1133 1112 1123 1113 |
c dsdePl | 2211 2222 2233 2212 2223 2213 |
c dsdePl | 3311 3322 3333 3312 3323 3313 |
c dsdePl | 1211 1222 1233 1212 1223 1213 |
c dsdePl | 2311 2322 2333 2312 2323 2313 |
c dsdePl | 1311 1322 1333 1312 1323 1313 |
c plane strain or axisymmetric (11, 22, 33, 12)
c dsdePl | 1111 1122 1133 1112 |
c dsdePl | 2211 2222 2233 2212 |
c dsdePl | 3311 3322 3333 3312 |
c dsdePl | 1211 1222 1233 1212 |
c plane stress (11, 22, 12)
c dsdePl | 1111 1122 1112 |
c dsdePl | 2211 2222 2212 |
c dsdePl | 1211 1222 1212 |
c 3d beam (11, 13, 12)
c dsdePl | 1111 1113 1112 |
c dsdePl | 1311 1313 1312 |
c dsdePl | 1211 1213 1212 |
c 1d
c dsdePl | 1111 |
c
c*************************************************************************
#include "impcom.inc"
c
INTEGER
& matId, elemId,
& kDomIntPt, kLayer, kSectPt,
& ldstep,isubst,keycut,
& nDirect,nShear,ncomp,nStatev,nProp
DOUBLE PRECISION
& Time, dTime, Temp, dTemp,
& sedEl, sedPl, epseq, epsZZ
DOUBLE PRECISION
& stress (ncomp ), statev (nStatev),
& dsdePl (ncomp,ncomp),
& Strain (ncomp ), dStrain (ncomp ),
& epsPl (ncomp ), prop (nProp ),
& coords (3), rotateM (3,3),
& defGrad (3,3), defGrad_t(3,3),
& tsstif (2)
c
EXTERNAL usermat3d, usermatps, usermatbm, usermat1d
DOUBLE PRECISION var1, var2, var3, var4, var5,
& var6, var7, var8
c
c*************************************************************************
c
IF(ncomp .GE. 4) THEN
c *** 3d, plane strain and axisymmetric example
call usermat3d (
& matId, elemId,kDomIntPt, kLayer, kSectPt,
& ldstep,isubst,keycut,
& nDirect,nShear,ncomp,nStatev,nProp,
& Time,dTime,Temp,dTemp,
& stress,statev,dsdePl,sedEl,sedPl,epseq,
& Strain,dStrain, epsPl, prop, coords,
& rotateM, defGrad_t, defGrad,
& tsstif, epsZZ,
& var1, var2, var3, var4, var5,
& var6, var7, var8)
ELSE IF(nDirect.eq. 2 .and. ncomp .EQ. 3) THEN
c *** plane stress example
call usermatps (
& matId, elemId,kDomIntPt, kLayer, kSectPt,
& ldstep,isubst,keycut,
& nDirect,nShear,ncomp,nStatev,nProp,
& Time,dTime,Temp,dTemp,
& stress,statev,dsdePl,sedEl,sedPl,epseq,
& Strain,dStrain, epsPl, prop, coords,
& rotateM, defGrad_t, defGrad,
& tsstif, epsZZ,
& var1, var2, var3, var4, var5,
& var6, var7, var8)
ELSE IF(ncomp .EQ. 3) THEN
c *** 3d beam example
call usermatbm (
& matId, elemId,kDomIntPt, kLayer, kSectPt,
& ldstep,isubst,keycut,
& nDirect,nShear,ncomp,nStatev,nProp,
& Time,dTime,Temp,dTemp,
& stress,statev,dsdePl,sedEl,sedPl,epseq,
& Strain,dStrain, epsPl, prop, coords,
& rotateM, defGrad_t, defGrad,
& tsstif, epsZZ,
& var1, var2, var3, var4, var5,
& var6, var7, var8)
ELSE IF(ncomp .EQ. 1) THEN
c *** 1d beam example
call usermat1d (
& matId, elemId,kDomIntPt, kLayer, kSectPt,
& ldstep,isubst,keycut,
& nDirect,nShear,ncomp,nStatev,nProp,
& Time,dTime,Temp,dTemp,
& stress,statev,dsdePl,sedEl,sedPl,epseq,
& Strain,dStrain, epsPl, prop, coords,
& rotateM, defGrad_t, defGrad,
& tsstif, epsZZ,
& var1, var2, var3, var4, var5,
& var6, var7, var8)
END IF
return
end |
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