** connector friction tests for SLOT
**   -PREDEFINED + PRESTRESS
**   -CUSTOMIZED + PRESTRESS
** results should be identical between the two connector elements
**------------------------------------------------
*preprint,model=yes
*restart,write,number interval=10
*Node,nset = all
101,0,0,0
102,1,0,0
201,2,0,0
202,3,0,0
*orientation,name=global
1,0,0, 0,1,0
3,0.0
**-------------------------------------------------
*element,type=mass,elset=mass
10001,101
10002,102
20001,201
20002,202
*mass,elset=mass
1.0,
*element,type=rotaryI,elset=rotaryI
110001,101
110002,102
120001,201
120002,202
*rotary inertia,elset=rotaryI
1.0,1.0,1.0
**-------------------------------------------------
*element,type=conn3d2,elset=slotPredef
1001,101,102
*connector section,elset=slotPredef,behavior=fricPredef
slot,
global,
**-------
*connector behavior,name=fricPredef
*connector friction,predefined
1.25,
*friction
0.1,0.0, 0.0
0.25,10.0, 0.0
0.2,11.0,0.0
0.3,12.0,20.0
**-------
*connector elastic,comp=1
12.0,
**--------------------------------------------------
*element,type=conn3d2,elset=slotCustom
2001,201,202
*connector section,elset=slotCustom,behavior=fricCustom
slot,
global,
**--------------
*connector behavior,name=fricCustom
*connector derived component, name=norm
2,3
1.0,1.0
*connector friction,contact force=norm, component=1
1.25, 0.0
1.00, 10.0
*friction
0.1,0.0, 0.0
0.25,10.0, 0.0
0.2,11.0,0.0
0.3,12.0,20.0
**------
*connector elastic,comp=1
12.0,
**--------------------------------------------------
*boundary
101,1,6
201,1,6
*elset,elset=conn
 slotPredef,slotCustom
*initial conditions, type=vel
102,1,1.0
202,1,1.0
*step
*dynamic, explicit, direct user control
1.0E-04, 1.0
**--------------------------------------------------
*cload
**load that creates constraint forces
102,2,10.0
102,3,20.0
202,2,10.0
202,3,20.0
*boundary, type=vel
102,1,1,1.0
202,1,1,1.0
**--------------------------------------------------
*OUTPUT, FIELD, NUMBER INTERVAL=5
*NODE OUTPUT,nset=all
U,
*OUTPUT,HISTORY
*NODE OUTPUT,nset=all
U,
*ELEMENT OUTPUT,elset=conn
CU,CASU,CEF,CSF,CTF,CNF,CSF
*ENERGY OUTPUT,VARIABLE=ALL
*end step