CFVR8002 - Mohr-Coulomb
CivilFEM's Mohr-Coulomb equivalent to ANSYS's Linear Extended Drucker-Prager
Checking equivalence between the material models Mohr-Coulomb of CivilFEM and Linear Extended Drucker-Prager of ANSYS
It uses the following material models:
- Mohr-Coulomb
- Linear Extended Drucker-Prager
Element types used in the model: PLANE42,PLANE182,SURF153 Needed CivilFEM Modules: |
|
| Model Statistics | |
| Number of elements | 20 |
| Number of nodes | 25 |
| Number of civil materials | 2 |
| Number of cross sections | 0 |
| Number of shell vertices | 0 |
Log file: CFVR8002.DAT
FINISH ~CFCLEAR,,1 NomFile='CFVR8002' /TITLE, %NomFile%, CivilFEM's Mohr-Coulomb ! ------------------------------------------------------------------------------------- ! Initial data ! ------------------------------------------------------------------------------------- ~UNITS,SI /PREP7 *AFUN,DEG HYP = 0. ! hyperbolic parameter ECC = 1. ! eccentricity parameter LENG = 1. ! length of the rectangle edge NDIV = 4 ! number of division per side side NTINC = 50 ! number of substeps per step FS = 1.05E+4 ! surface force INODE = 1 ! node for results checking ! ------------------------------------------------------------------------------------- ! Model definition ! ------------------------------------------------------------------------------------- LOCAL,11,0 ! Materials ! Mohr-Coulomb ~CFMP,1,LIB,SOIL,,CL ~CFMP,1,SOIL,KPLA,,2 ~CFMP,1,SOIL,KMCSP,,1 ~CFMP,1,SOIL,HYP,,HYP ~CFMP,1,SOIL,ECC,,ECC ~CFMP,1,SOIL,IFLOW,,0 ~CFGET,PHI,MATERIAL,1,SOIL,PHIMCeff ~CFGET,COH,MATERIAL,1,SOIL,CMCeff ! Linear Extended Drucker-Prager ~CFMP,2,LIB,SOIL,,CL TB,EDP,2,,,LYFUN TMP = SIN(PHI) TMP1 = 6/(3 - TMP) C1 = TMP*TMP1 C2 = COS(PHI)*TMP1*COH TBDATA,1,C1,C2 TB,EDP,2,,,LFPOT TBDATA,1,C1 ! Element types ET,1,PLANE42 KEYOPT,1,2,1 KEYOPT,1,3,2 ET,2,PLANE182 KEYOPT,2,1,0 KEYOPT,2,3,2 ET,3,SURF153 KEYOPT,3,2,1 KEYOPT,3,3,2 KEYOPT,3,4,1 ! Geometry K,1,0,0 K,2,LENG,0 K,3,LENG,LENG K,4,0,LENG A,1,2,3,4 LESIZE,ALL,,,NDIV ! Meshing LSEL,ALL TYPE,1 AMESH,1 TYPE,3 ESYS,11 LMESH,2 ! Loads DL,1,,UY DL,4,,UX SFL,3,PRES,2*FS SFL,2,PRES,FS ! ESEL,S,TYPE,,3 ! SFE,ALL,2,PRES,,FS !-------------------------------------------------------------------------------------- ! DATA CHECK !-------------------------------------------------------------------------------------- ! Data comparison number NCOMP = 9 NCOMP_CH = 0 ! Array dimensions *DIM,LABEL,CHAR,NCOMP,1 *DIM,LABEL_CH,CHAR,NCOMP_CH,1 *DIM,VALUE,,NCOMP,3 *DIM,VALUE_CH,CHAR,NCOMP_CH,3 *DIM,TOLER,,NCOMP,2 ! Labels !-------------------------------------------------------------------------------------- LABEL(1) = 'SX' LABEL(2) = 'SY' LABEL(3) = 'SEQV' LABEL(4) = 'EPELX' LABEL(5) = 'EPELY' LABEL(6) = 'EPELEQV' LABEL(7) = 'EPPLX' LABEL(8) = 'EPPLY' LABEL(9) = 'EPPLEQV' ! Warning errors and tolerances TOLER(1,1) = 1.E+3 $ TOLER(1,2) = 1.E+3 TOLER(2,1) = 1.E+3 $ TOLER(2,2) = 1.E+3 TOLER(3,1) = 1.E+3 $ TOLER(3,2) = 1.E+3 TOLER(4,1) = 2.5E-5 $ TOLER(4,2) = 2.5E-5 TOLER(5,1) = 2.5E-5 $ TOLER(5,2) = 2.5E-5 TOLER(6,1) = 3.1E-5 $ TOLER(6,2) = 3.1E-5 TOLER(7,1) = 1.E-5 $ TOLER(7,2) = 1E-5 TOLER(8,1) = 1.E-5 $ TOLER(8,2) = 1E-5 TOLER(9,1) = 1.E-5 $ TOLER(9,2) = 1E-5 ! Correct values !-------------------------------------------------------------------------------------- /SOLU SOLCONTROL,OFF NROPT,FULL NEQIT,50 LNSRCH,ON NSUBST,NTINC OUTRES,ALL,NONE OUTRES,NSOL,LAST OUTRES,ESOL,LAST /PREP7 ESLA EMODIF,ALL,MAT,2 EMODIF,ALL,TYPE,2 ESEL,ALL /SOLU SOLVE *GET,VALUE(1,1),NODE,INODE,S,X *GET,VALUE(2,1),NODE,INODE,S,Y *GET,VALUE(3,1),NODE,INODE,S,EQV *GET,VALUE(4,1),NODE,INODE,EPEL,X *GET,VALUE(5,1),NODE,INODE,EPEL,Y *GET,VALUE(6,1),NODE,INODE,EPEL,EQV *GET,VALUE(7,1),NODE,INODE,EPPL,X *GET,VALUE(8,1),NODE,INODE,EPPL,Y *GET,VALUE(9,1),NODE,INODE,EPPL,EQV ! Obtained values !-------------------------------------------------------------------------------------- /PREP7 ESLA EMODIF,ALL,MAT,1 EMODIF,ALL,TYPE,1 ESEL,ALL /SOLU SOLVE *GET,VALUE(1,2),NODE,INODE,S,X *GET,VALUE(2,2),NODE,INODE,S,Y *GET,VALUE(3,2),NODE,INODE,S,EQV *GET,VALUE(4,2),NODE,INODE,EPEL,X *GET,VALUE(5,2),NODE,INODE,EPEL,Y *GET,VALUE(6,2),NODE,INODE,EPEL,EQV *GET,VALUE(7,2),NODE,INODE,EPPL,X *GET,VALUE(8,2),NODE,INODE,EPPL,Y *GET,VALUE(9,2),NODE,INODE,EPPL,EQV !-------------------------------------------------------------------------------------- ! Results comparison !-------------------------------------------------------------------------------------- COMPARA.MAC |
Results
| Label | Target | CivilFEM | Ratio | Tolerance |
| SX | 10499 | 10499 | 1.000 | 1000 |
| SY | -21001 | -21001 | 1.000 | 1000 |
| SEQV | 27568 | 27568 | 1.000 | 1000 |
| EPELX | 0.0011295 | 0.0011295 | 1.000 | 2.5e-005 |
| EPELY | -0.0010755 | -0.0010755 | 1.000 | 2.5e-005 |
| EPELEQV | 0.0013784 | 0.0013784 | 1.000 | 3.1e-005 |
| EPPLX | 0.0013492 | 0.0013492 | 1.000 | 1e-005 |
| EPPLY | -0.00052781 | -0.00052781 | 1.000 | 1e-005 |
| EPPLEQV | 0.0010889 | 0.0010889 | 1.000 | 1e-005 |
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