*HEADING
: SIMPLE CONTACT TEST, 3-D TIED CONTACT, DEFORMABLE
** C3D10I
**
*NODE
**
**
*ELEMENT, TYPE=C3D10I, ELSET=PROP1
**
** Prop1
**
*SOLID SECTION, ELSET=PROP1, MATERIAL=MAT1
*MATERIAL, NAME=MAT1
*ELASTIC
 30.0E6, 0.0
**
*RESTART, WRITE, FREQUENCY=3
**
**
** TOP_DISP
**
*NSET,NSET=TOP_NODE,GENERATE
*BOUNDARY, OP=NEW
 TOP_NODE, 1, 2, 0.
**
** Bot_DISP
**
*NSET,NSET=BOT_NODE,GENERATE
*BOUNDARY, OP=NEW
 BOT_NODE, 1, 3, 0.
**
** TOP CONTACT SURFACE
**
*surface,NAME=BSURF
       6, S2
       8, S2
**
** BOTTOM CONTACT SURFACE
**
*surface,NAME=TSURF
       2, S2
       4, S2
*CONTACT PAIR,INTERACTION=SLIDE,TIED,ADJUST=0.2
TSURF, BSURF
*SURFACE INTERACTION,NAME=SLIDE
*FRICTION
0.,
**
** step 1: pull two blocks apart
**
*STEP ,NLGEOM
*STATIC
0.25,1.
*BOUNDARY
 TOP_NODE, 3,, 0.1
*CONTACT PRINT,SLAVE=TSURF,MASTER=BSURF
*CONTACT FILE,SLAVE=TSURF,MASTER=BSURF,F=4
*EL FILE ,FREQ=4
 S,
 E,
*NODE FILE,FREQ=4
 RF,
*ENERGY PRINT
*EL PRINT ,SUM=NO
 S,
 E,
*NODE PRINT,SUM=NO
 RF,
*END STEP
**
** step 2: slide top cube to the right
**
*STEP,NLGEOM, INC=50
*STATIC
0.1, 1.0
*BOUNDARY
 TOP_NODE, 1,, -0.1
*END STEP