*HEADING
: PORE PRESSURE INTERFACE WITHOUT GAP FLOW, STEADY STATE  [CONTACT PAIR]
*RESTART,WRITE
*NODE,NSET=NALL
1,1.,0.
2,4.,0.
3,4.,1.
4,1.,1.
5,2.5,0.
6,4.,.5
7,2.5,1.
8,1.,.5
11,1.,1.101
12,4.,1.101
13,4.,2.101
14,1.,2.101
15,2.5,1.101
16,4.,1.601
17,2.5,2.101
18,1.,1.601
*NSET,NSET=NBOT
1,2,5
*NSET,NSET=NTOP
13,14,17
*NSET,NSET=TOPNODES
11,15,12,18,16
*ELEMENT,TYPE=CPE8P,ELSET=CONT
1,1,2,3,4,5,6,7,8
2,11,12,13,14,15,16,17,18
*surface,NAME=MAS
1,S3
*surface,NAME=SLA
2,S1
*CONTACT PAIR,INTERACTION=ISLS, Small sliding, TYPE=SURFACE TO SURFACE
SLA, MAS
*SURFACE INTERACTION,NAME=ISLS
0.5,
*SOLID SECTION,ELSET=CONT,MATERIAL=CONT
.5,
*MATERIAL,NAME=CONT
*ELASTIC
1.E8,
*PERMEABILITY,SPECIFIC=1.0
1.E-4,
*INITIAL CONDITIONS,TYPE=RATIO
NALL,1.0
*BOUNDARY
NALL,1
NBOT,2
NBOT,8
NTOP,8
**
** BRING SURFACES TOGETHER
**
*STEP, UNSYMM=YES
*SOILS
1., 1.
*CONTROLS, PARAMETER=FIELD, FIELD=DISPLACEMENT
,,10.0
*BOUNDARY
NTOP, 2, 2, -0.1
*NODE FILE
POR,
*OUTPUT,FIELD
*NODE OUTPUT
POR,
*CONTACT FILE
PFL, PTL, PFLA, PTLA
TPFL, TPTL
*OUTPUT,FIELD
*CONTACT OUTPUT
PFL,PTL,PFLA,PTLA
*END STEP