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# Reduced Input

*Node and *Element Cards are removed.
```  *KEYWORD
*TITLE
INTERFACE SEGMENTS (FIRST ANALYSIS)
\$
\$  LSTC Example
\$
\$
\$  Units: ton, mm, s, N, MPa, N-mm
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Control Ouput
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
*CONTROL_TERMINATION
\$   endtim    endcyc     dtmin    endneg    endmas
0.0003
\$
*CONTROL_ENERGY
\$     hgen      rwen    slnten     rylen
2
\$
*CONTROL_HOURGLASS
\$      ihq        qh
4
\$
\$\$\$\$  opifs - output interval for interface file
\$
*CONTROL_OUTPUT
\$    npopt    neecho    nrefup    iaccop     opifs    ipnint    ikedit
2.000E-6
\$
*CONTROL_TIMESTEP
\$   dtinit      scft      isdo    tslimt      dtms      lctm     erode     ms1st
0.10
\$
\$
*DATABASE_BINARY_D3PLOT
\$       dt      lcdt
0.00002
\$
*DATABASE_BINARY_D3THDT
\$       dt      lcdt
0.00001
\$
*DATABASE_EXTENT_BINARY
\$    neiph     neips    maxint    strflg    sigflg    epsflg    rltflg    engflg
1
\$   cmpflg    ieverp    beamip

\$
*DATABASE_GLSTAT
\$       dt
0.00001
\$
*DATABASE_NODOUT
\$       dt
0.00001
\$
*DATABASE_HISTORY_NODE
\$      id1       id2       id3       id4       id5       id6       id7       id8
101
\$
*DATABASE_RCFORC
\$       dt
0.00001
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Interface
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
\$\$\$\$  Save the behavior on the following segment in the interface file.
\$\$\$\$  This file will then be used in the second analysis.
\$
*INTERFACE_COMPONENT_SEGMENT
\$      sid
3
\$
*SET_SEGMENT
\$      sid       da1       da2       da3       da4
3
\$       n1        n2        n3        n4        a1        a2        a3        a4
101       102       104       103
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Initial Velocity
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  All nodes in box 1 are given an initial velocity (nodes of the cube).
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
*INITIAL_VELOCITY
\$     nsid    nsidex     boxid
1
\$       vx        vy        vz
0.0       0.0 -100000.0
\$
*DEFINE_BOX
\$    boxid       xmm       xmx       ymn       ymx       zmn       zmx
1      15.0      25.0      15.0      25.0      10.0      20.0
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Contact - Sliding Interfaces
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
\$\$\$\$  Contact between the bottom of the cube (segment set 1) and the plate.
\$
*CONTACT_SURFACE_TO_SURFACE
\$     ssid      msid     sstyp     mstyp    sboxid    mboxid       spr       mpr
1         2
\$       fs        fd        dc        vc       vdc    penchk        bt        dt

\$      sfs       sfm       sst       mst      sfst      sfmt       fsf       vsf

\$
*SET_SEGMENT
\$      sid       da1       da2       da3       da4
1
\$       n1        n2        n3        n4        a1        a2        a3        a4
101       103       104       102
\$
*SET_SEGMENT
\$      sid       da1       da2       da3       da4
2
\$       n1        n2        n3        n4        a1        a2        a3        a4
7         8        13        12
8         9        14        13
12        13        18        17
13        14        19        18
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Define Parts and Materials
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
*PART
\$      pid       sid       mid     eosid      hgid    adpopt
Plate
1         1         1
Cube
2         2         2
\$
\$
*MAT_ELASTIC
\$      mid        ro         e        pr        da        db
1   2.00e-8  100000.0     0.300
\$
*MAT_ELASTIC
\$      mid        ro         e        pr        da        db
2   1.00e-8  100000.0     0.300
\$
\$
*SECTION_SHELL
\$      sid    elform      shrf       nip     propt   qr/irid     icomp
1             0.83333       2.0       3.0
\$       t1        t2        t3        t4      nloc
2.0       2.0       2.0       2.0
\$
*SECTION_SOLID
\$      sid    elform
2
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Define Nodes and Elements
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
2nd file:
*END
*KEYWORD
*TITLE
INTERFACE SEGMENTS (SECOND ANALYSIS)
\$
\$  LSTC Example
\$
\$    - The only loading on this model comes from the interface file.
\$
\$
\$  Units: ton, mm, s, N, MPa, N-mm
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Control Ouput
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
*CONTROL_TERMINATION
\$   endtim    endcyc     dtmin    endneg    endmas
0.0003
\$
*CONTROL_ENERGY
\$     hgen      rwen    slnten     rylen
2
\$
*CONTROL_HOURGLASS
\$      ihq        qh
4
\$
\$\$\$\$  opifs - output interval for interface file
\$
*CONTROL_OUTPUT
\$    npopt    neecho    nrefup    iaccop     opifs    ipnint    ikedit
0.002E-3
\$
*CONTROL_TIMESTEP
\$   dtinit      scft      isdo    tslimt      dtms      lctm     erode     ms1st
0.10
\$
\$
*DATABASE_BINARY_D3PLOT
\$       dt      lcdt
0.00002
\$
*DATABASE_BINARY_D3THDT
\$       dt      lcdt
0.00001
\$
*DATABASE_EXTENT_BINARY
\$    neiph     neips    maxint    strflg    sigflg    epsflg    rltflg    engflg
1
\$   cmpflg    ieverp    beamip

\$
*DATABASE_GLSTAT
\$       dt
0.00001
\$
*DATABASE_NODOUT
\$       dt
0.00001
\$
*DATABASE_HISTORY_NODE
\$      id1       id2       id3       id4       id5       id6       id7       id8
101       201       205
\$
*DATABASE_RCFORC
\$       dt
0.00001
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Interface
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
\$\$\$\$  Link the interface file to the following segments.
\$
\$     ssid      ifid
3         1
\$
*SET_SEGMENT
\$      sid       da1       da2       da3       da4
3
\$       n1        n2        n3        n4        a1        a2        a3        a4
201       202       205       204
202       203       206       205
204       205       208       207
205       206       209       208
\$
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Define Parts and Materials
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
\$
*PART
\$      pid       sid       mid     eosid      hgid    adpopt
New Cube
1         1         1
\$
\$
*MAT_ELASTIC
\$      mid        ro         e        pr        da        db
1   1.00e-8  100000.0     0.300
\$
\$
*SECTION_SOLID
\$      sid    elform
1
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
\$\$\$\$  Define Nodes and Elements
\$
\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$\$
\$
*NODE
\$   node               x               y               z      tc      rc
101    1.500000E+01    1.500000E+01    1.000000E+01       0       0
102    2.500000E+01    1.500000E+01    1.000000E+01       0       0
103    1.500000E+01    2.500000E+01    1.000000E+01       0       0
104    2.500000E+01    2.500000E+01    1.000000E+01       0       0
201    1.500000E+01    1.500000E+01    1.000000E+01       0       0
202    2.000000E+01    1.500000E+01    1.000000E+01       0       0
203    2.500000E+01    1.500000E+01    1.000000E+01       0       0
204    1.500000E+01    2.000000E+01    1.000000E+01       0       0
205    2.000000E+01    2.000000E+01    1.000000E+01       0       0
206    2.500000E+01    2.000000E+01    1.000000E+01       0       0
207    1.500000E+01    2.500000E+01    1.000000E+01       0       0
208    2.000000E+01    2.500000E+01    1.000000E+01       0       0
209    2.500000E+01    2.500000E+01    1.000000E+01       0       0
210    1.500000E+01    1.500000E+01    1.500000E+01       0       0
211    2.000000E+01    1.500000E+01    1.500000E+01       0       0
212    2.500000E+01    1.500000E+01    1.500000E+01       0       0
213    1.500000E+01    2.000000E+01    1.500000E+01       0       0
214    2.000000E+01    2.000000E+01    1.500000E+01       0       0
215    2.500000E+01    2.000000E+01    1.500000E+01       0       0
216    1.500000E+01    2.500000E+01    1.500000E+01       0       0
217    2.000000E+01    2.500000E+01    1.500000E+01       0       0
218    2.500000E+01    2.500000E+01    1.500000E+01       0       0
219    1.500000E+01    1.500000E+01    2.000000E+01       0       0
220    2.000000E+01    1.500000E+01    2.000000E+01       0       0
221    2.500000E+01    1.500000E+01    2.000000E+01       0       0
222    1.500000E+01    2.000000E+01    2.000000E+01       0       0
223    2.000000E+01    2.000000E+01    2.000000E+01       0       0
224    2.500000E+01    2.000000E+01    2.000000E+01       0       0
225    1.500000E+01    2.500000E+01    2.000000E+01       0       0
226    2.000000E+01    2.500000E+01    2.000000E+01       0       0
227    2.500000E+01    2.500000E+01    2.000000E+01       0       0
\$
\$\$\$\$\$  Solid Elements
\$
*ELEMENT_SOLID
\$    eid     pid      n1      n2      n3      n4      n5      n6      n7      n8
101       1     201     202     205     204     210     211     214     213
102       1     202     203     206     205     211     212     215     214
103       1     204     205     208     207     213     214     217     216
104       1     205     206     209     208     214     215     218     217
105       1     210     211     214     213     219     220     223     222
106       1     211     212     215     214     220     221     224     223
107       1     213     214     217     216     222     223     226     225
108       1     214     215     218     217     223     224     227     226
\$
*END```