*HEADING
: *CONTACT INTERFERENCE AUTOMATIC SHRINK FIT [2D-SMALL SLIDE]
*NODE
1,
2,1.,
3,1.,1.2,
4,,1.2
11,-1.,1.
12,2.,1.
13,2.,3.
14,-1.,3.
*ELEMENT,TYPE=CPE4,ELSET=BOT
1,1,2,3,4
*ELEMENT,TYPE=CPE4,ELSET=TOP
11,11,12,13,14
*SOLID SECTION,ELSET=TOP,MATERIAL=MAT
*SOLID SECTION,ELSET=BOT,MATERIAL=MAT
*MATERIAL,NAME=MAT
*ELASTIC
1.E5,0.
*surface, NAME=TOPS
TOP,S1
*surface, NAME=BOTS
BOT,S3
*CONTACT PAIR, INTERACTION=INTERS, SMALL SLIDING
BOTS,TOPS
*SURFACE INTERACTION,NAME=INTERS
*BOUNDARY
1,1,2
2,1,2
13,1,2
14,1,2
*STEP,INC=20,NLGEOM
*STATIC
0.2,1.,0.2,0.2
*CONTACT INTERFERENCE,SHRINK
BOTS,TOPS
*EL FILE
S, 
*OUTPUT,FIELD
*ELEMENT OUTPUT
S,
*NODE FILE
U, 
*OUTPUT,FIELD
*NODE OUTPUT
U,
*CONTACT FILE,SLAVE=BOTS,MASTER=TOPS
*OUTPUT,FIELD
*CONTACT OUTPUT,VARIABLE=PRESELECT,SLAVE=BOTS,MASTER=TOPS
*CONTACT PRINT,SLAVE=BOTS,MASTER=TOPS
*PRINT,CONTACT=YES
*ENDSTEP