*HEADING
: PORE PRESSURE COUPLED CONTACT (CPE4P) (FINITE SLIDING)
*RESTART,WRITE,F=2
*NODE,NSET=ALL
*NGEN,NSET=ALL
*NSET,NSET=BOT,GEN
*NSET,NSET=TOP,GEN
**
*ELEMENT,TYPE=CPE4P,ELSET=DEAD
*SOLID SECTION,ELSET=DEAD,MATERIAL=DEAD
*MATERIAL,NAME=DEAD
*ELASTIC
30.E6,
*PERMEABILITY,SPECIFIC=1.0
 1.E-4,
**
*ELEMENT,TYPE=CPE4P,ELSET=ACTIVE
*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,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
*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
*OUTPUT,FIELD
*END STEP
**
*STEP,INC=50,NLGEOM,AMP=RAMP,UNSYMM=YES
Step 2
*SOIL, CONSOLIDATION
*BOUNDARY,FIXED
TOP,2,2
*BOUNDARY
113, 1,1, 1.5
*CONTACT PRINT
CAREA, TPFL
*CONTACT FILE
CAREA, TPFL
*END STEP