*HEADING
 Tie two shells together with offset, no rotation and prescribed constraint ratio
 File name: xtie_xpl_shell_cratio
*NODE,NSET=NALL
1, 0., 0., 0.
2,0.5, 0., 0.
3, 1., 0., 0.
4, 0., 0., 1.
5,0.5, 0., 1.
6, 1., 0., 1.
7, 0., 0.2, 0.
8,0.5, 0.2, 0.
9, 1., 0.2, 0.
10, 0., 0.2, 1.
11,0.5, 0.2, 1.
12, 1., 0.2, 1.
*NSET, NSET=BOT, GEN
1,6,1
*NSET, NSET=TOP, GEN
7,12,1
*ELEMENT,TYPE=S4R,ELSET=EALL
1,1,2,5,4
2,2,3,6,5
3,7,8,11,10
4,8,9,12,11
*SHELL SECTION, ELSET=EALL, MATERIAL=STEEL,
SECTION INTEGRATION=GAUSS
.01,5
*MATERIAL, NAME=STEEL
*ELASTIC
2.E11,0.3
*DENSITY
7.8E3, 
*SURFACE,TYPE=ELEMENT, NAME=SECONDARY1
3,SPOS
4,SPOS
*SURFACE,TYPE=ELEMENT, NAME=MAIN1
1,SNEG
2,SNEG
*TIE, NAME=TIE,ADJUST=NO,POSITION TOLERANCE=1.0,NO ROTATION,CONSTRAINT RATIO=.5
SECONDARY1,MAIN1
*BOUNDARY
BOT,1,5
*STEP
*DYNAMIC,EXPLICIT
,0.666667
*BOUNDARY,TYPE=VELOCITY
BOT,6, 6, 2.0
*FILE OUTPUT,NUMBER INTERVAL=1,TIMEMARKS=YES
*NODE FILE
U,
*OUTPUT,FIELD,NUMBER=5
*NODE OUTPUT
U,
**OUTPUT,HISTORY,FREQ=10
***NODE OUTPUT,NSET=NALL
***U,V,A
*END STEP