*HEADING
EIA3PFSS_CAX6MP: PORE PRESSURE COUPLED CONTACT (CAX6MP) (FINITE SLIDING)
*RESTART,WRITE,F=2
*SYSTEM
*NODE,NSET=ALL
*NGEN,NSET=ALL
*NSET,NSET=BOT,GEN
*NSET,NSET=TOP,GEN
**
*ELEMENT,TYPE=CAX6MP,ELSET=DEAD
**1,1,3,13,11,2,1003,12,1001
**2,3,5,15,13,4,1005,14,1003
**3,5,7,17,15,6,1007,16,1005
*SOLID SECTION,ELSET=DEAD,MATERIAL=DEAD
*hourglass stiffness
*MATERIAL,NAME=DEAD
*ELASTIC
30.E6,
*PERMEABILITY
 1.E-4,
**
*ELEMENT,TYPE=CAX6MP,ELSET=ACTIVE
**101,101,103,113,111,102,1103,112,1101
**102,103,105,115,113,104,1105,114,1103
*SOLID SECTION,ELSET=ACTIVE,MATERIAL=ACTIVE
*hourglass stiffness
*MATERIAL,NAME=ACTIVE
*ELASTIC
30.E6,
*PERMEABILITY
 1.E-4,
**
*surface,NAME=MAS
102,S2
202,S2
302,S2
**1,S3
**2,S3
**3,S3
*surface,NAME=SLA
401,S1
501,S1
**101,S1
**102,S1
*CONTACT PAIR,INTERACTION=ISLS
***TIE,NAME=TIE
SLA, MAS
*SURFACE INTERACTION,NAME=ISLS
1.0,
**
*INITIAL CONDITIONS,TYPE=RATIO
ALL, 1.0
*INITIAL CONDITIONS,TYPE=PORE PRESSURE
ALL, 100.0
**
*STEP,INC=50,NLGEOM,AMP=STEP,UNSYMM=YES
Step 1
*SOIL, CONSOLIDATION
*BOUNDARY
BOT,1,1
1,2,2
7,2,2
113,2,2
4,8,8,100.
**
*DLOAD
402,P2,100.
502,P2,100.
*DFLOW
402,S2,1.e-4
502,S2,1.e-4
101,S1,-1.e-4
201,S1,-1.e-4
301,S1,-1.e-4
**
*OUTPUT,FIELD
*NODE OUTPUT
POR,
*ELEMENT OUTPUT
FLVEL,
*EL PRINT,F=100
S,E
*PRINT,CONTACT=YES
*CONTACT PRINT
CAREA, TPFL
*CONTACT FILE
CAREA, TPFL
*END STEP
**
*STEP,INC=50,NLGEOM,AMP=RAMP,UNSYMM=YES
Step 2
*SOIL, CONSOLIDATION
*BOUNDARY,FIXED
TOP,1,1
*BOUNDARY
113, 2,2, 1.5
*CONTACT PRINT
CAREA, TPFL
*CONTACT FILE
CAREA, TPFL
*END STEP