*HEADING
EI23PFSS_CPE6MP: PORE PRESSURE COUPLED CONTACT (CPE6MP) (FINITE SLIDING)
*RESTART,WRITE,F=2
*NODE,NSET=ALL
   1, 1., 0.  
   7, 7., 0.
  11, 1., 1.
  17, 7., 1.
 101, 3., 1.
 105, 5., 1.
 111, 3., 2.
 115, 5., 2.
1001, 1., 0.5
1007, 7., 0.5
1101, 3., 1.5
1105, 5., 1.5 
*NGEN,NSET=ALL   
1,7,1
11,17,1
101,105,1
111,115,1
1001,1007,1
1101,1105,1
*NSET,NSET=BOT,GEN
1,7,1
*NSET,NSET=TOP,GEN
111,115,1
**
*ELEMENT,TYPE=CPE6MP,ELSET=DEAD
101,1,3,13,2,1003,1002
102,1,13,11,1002,12,1001
201,3,5,15,4,1005,1004
202,3,15,13,1004,14,1003
301,5,7,17,6,1007,1006
302,5,17,15,1006,16,1005
*SOLID SECTION,ELSET=DEAD,MATERIAL=DEAD
*MATERIAL,NAME=DEAD
*ELASTIC
30.E6,
*PERMEABILITY,SPECIFIC=1.0
 1.E-4, 
**
*ELEMENT,TYPE=CPE6MP,ELSET=ACTIVE
401,101,103,113,102,1103,1102
402,101,113,111,1102,112,1101
501,103,105,115,104,1105,1104
502,103,115,113,1104,114,1103
*SOLID SECTION,ELSET=ACTIVE,MATERIAL=ACTIVE
*MATERIAL,NAME=ACTIVE
*ELASTIC
30.E6,
*PERMEABILITY,SPECIFIC=1.0
 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
*CONTACT PAIR,INTERACTION=ISLS,TYPE=SURFACE
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
1,1.
*BOUNDARY
BOT,2,2
1,1,1
7,1,1
113,1,2
4,8,,100.
**
*DLOAD
402,P2,100.
502,P2,100.
*DFLOW
402,S2,3.e-4
502,S2,3.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
1,1.
*BOUNDARY,FIXED
TOP,2,2
*BOUNDARY
113, 1,1, 1.5
4,8,8,100.
*CONTACT PRINT
CAREA, TPFL
*CONTACT FILE
CAREA, TPFL
*END STEP