*HEADING
: PORE PRESSURE COUPLED CONTACT (C3D20P) (FINITE SLIDING)
*RESTART,WRITE,F=2
*NODE,NSET=ALL
**
**
*NGEN,NSET=ALL
*NSET,NSET=BOTTOM_NODES,GEN
*NSET,NSET=TOP_NODES,GEN
**
*ELEMENT,TYPE=C3D8P,ELSET=DEAD
*SOLID SECTION,ELSET=DEAD,MATERIAL=DEAD
*MATERIAL,NAME=DEAD
*ELASTIC
30.E6,
*PERMEABILITY
 1.E-4,
**
*ELEMENT,TYPE=C3D20P,ELSET=ACTIVE
*SOLID SECTION,ELSET=ACTIVE,MATERIAL=ACTIVE
*MATERIAL,NAME=ACTIVE
*ELASTIC
30.E6,
*PERMEABILITY
 1.E-4,
*surface,NAME=MAS
1,S5
2,S5
3,S5
*surface,NAME=SLA
101,S3
102,S3
*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, 10.0
**
*STEP,INC=10,NLGEOM,AMP=STEP
Step 1
*SOIL, CONSOLIDATION
*BOUNDARY
BOTTOM_NODES,2,3
TOP_NODES,3,3
1,1,1
7,1,1
21,1,1
27,1,1
113,1,1
133,1,1
*DLOAD
101,P5,100.
102,P5,100.
*DFLOW
101,S5,3.e-4
102,S5,3.e-4
1,S3,-1.e-4
2,S3,-1.e-4
3,S3,-1.e-4
**
*PRINT,CONTACT=YES
*CONTACT PRINT,F=10
TPFL,
*CONTACT FILE,F=10
TPFL,
*NODE PRINT, F=0
*EL PRINT, F=0
*END STEP
**
*STEP,INC=50,NLGEOM,AMP=RAMP
Step 2
*SOIL, CONSOLIDATION
*DLOAD
101,P5,400.
102,P5,400.
*BOUNDARY
113,1,1, 1.5
133,1,1, 1.5
*NODE PRINT, F=0
*EL PRINT, F=0
*CONTACT PRINT,F=10
TPFL,
*CONTACT FILE,F=10
TPFL,
*END STEP