*HEADING
: PORE PRESSURE COUPLED CONTACT (CPE8P) (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=CPE8P,ELSET=DEAD
1,1,3,13,11,2,1003,12,1001
3,5,7,17,15,6,1007,16,1005
*SOLID SECTION,ELSET=DEAD,MATERIAL=DEAD
*MATERIAL,NAME=DEAD
*ELASTIC
30.E6,
*PERMEABILITY,SPECIFIC=1.0
 1.E-4, 
**
*ELEMENT,TYPE=CPE8P,ELSET=ACTIVE
2,3,5,15,13,4,1005,14,1003
101,101,103,113,111,102,1103,112,1101
102,103,105,115,113,104,1105,114,1103
*SOLID SECTION,ELSET=ACTIVE,MATERIAL=ACTIVE
*MATERIAL,NAME=ACTIVE
*ELASTIC
30.E6,
*PERMEABILITY,SPECIFIC=1.0
 1.E-4, 
**
*surface,NAME=MAS
1,S3
2,S3
3,S3
*surface,NAME=SLA
101,S1
102,S1
*CONTACT PAIR,INTERACTION=ISLS
SLA, MAS
*SURFACE INTERACTION,NAME=ISLS
1.0,
*SURFACE BEHAVIOR, AUGMENTED
**
*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
113,1,1
*DLOAD
101,P3,100.
102,P3,100.
*DFLOW
101,S3,3.e-4
102,S3,3.e-4
1,S1,-1.e-4
2,S1,-1.e-4
3,S1,-1.e-4
**
*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
*CONTACT PRINT
CAREA, TPFL
*CONTACT FILE
CAREA, TPFL
*END STEP