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Example: Discrete Nodes Tied to a Surface

Filename: contact.tied_nodes.box.k

Description:
A shell element drops onto and then rebounds from, a hollow box that is tied
to an elastic plate.

Model:
The plate measures 40 * 40 * 1 mm3 and contains 16 Belytschko-Tsay shell
elements. The dropped shell element has a side length of 10 mm, a thickness
of 2 mm and a drop height of 10 mm. The box contains 12 Belytschko-Tsay shell
elements. All shell element materials are elastic. The initial velocity of the
shell elements is 100,000 mm/second. The calculation terminates at
0.002 seconds.

Input:
The nodes of the dropped shell are given an initial velocity
(*INITIAL_VELOCITY). The nodes on the bottom of the box, those facing the plate,
are tied to the plate (*CONTACT_TIED_NODES_TO_SURFACE). Automatic single
surface contact is used to define the contact between the dropped shell and
the box.

Reference:
Schweizerhof, K. and Weimar, K.

*CONTACT_AUTOMATIC_SINGLE_SURFACE
*CONTACT_TIED_NODES_TO_SURFACE
*CONTROL_HOURGLASS
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_HISTORY_NODE
*DATABASE_NODOUT
*ELEMENT_SHELL
*END
*INITIAL_VELOCITY
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*TITLE

  *KEYWORD
  *TITLE
  Sliding Interface Type 6
  $
  $  LSTC Example
  $
  $  Last Modified: September 5, 1997
  $
  $  A box is tied to a bottom plate with tied nodes to surface contact.
  $  This box is impacted by a shell element, which has an initial velocity.
  $
  $  Units: mm, s
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Control Ouput
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  *CONTROL_TERMINATION
  $   endtim    endcyc     dtmin    endneg    endmas
   0.200E-03
  $
  *CONTROL_HOURGLASS
  $      ihq        qh
           4
  $
  $
  *DATABASE_BINARY_D3PLOT
  $       dt      lcdt
   0.010E-03
  $
  *DATABASE_BINARY_D3THDT
  $       dt      lcdt
   .0005E-03
  $
  $
  *DATABASE_NODOUT
  $       dt
   .0010E-03
  $
  *DATABASE_HISTORY_NODE
  $      id1       id2       id3       id4       id5       id6       id7       id8
         101        13       213
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Contacts
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *CONTACT_AUTOMATIC_SINGLE_SURFACE
  $     ssid      msid     sstyp     mstyp    sboxid    mboxid       spr       mpr
           0
  $       fs        fd        dc        vc       vdc    penchk        bt        dt
  
  $      sfs       sfm       sst       mst      sfst      sfmt       fsf       vsf
  
  $
  $
  $$$$$$$$   The nodes on the bottom of the box (part 2) are tied to 
  $$$$$$$$   the bottom plate (part 1).
  $
  *CONTACT_TIED_NODES_TO_SURFACE
  $     ssid      msid     sstyp     mstyp    sboxid    mboxid       spr       mpr
           2         1         4         3                             1         1
  $       fs        fd        dc        vc       vdc    penchk        bt        dt
  
  $      sfs       sfm       sst       mst      sfst      sfmt       fsf       vsf
  
  $
  *SET_NODE_LIST
  $      sid       da1       da2       da3       da4
           2
  $     nid1      nid2      nid3      nid4      nid5      nid6      nid7      nid8
         201       202       203       204       206       207       208       209
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Initial Conditions
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Nodes of the dropped shell are given an initial velocity.
  $
  *INITIAL_VELOCITY
  $     nsid    nsidex     boxid
           3          
  $       vx        vy        vz
         0.0       0.0 -100000.0       0.0       0.0       0.0
  $
  *SET_NODE_LIST
  $      sid
           3
  $     nid1      nid2      nid3      nid4      nid5      nid6      nid7      nid8
         101       102       103       104
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Parts and Materials
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *PART
  $      pid       sid       mid     eosid      hgid    adpopt
  bottom plate
           1         1         1
  dropped shell
           2         2         1
  box
           3         1         1
  $
  $
  *MAT_ELASTIC
  $      mid        ro         e        pr        da        db         k
           1  1.00e-08   100000.     0.300
  $
  $
  *SECTION_SHELL
  $      sid    elform      shrf       nip     propt   qr/irid     icomp
           1             0.83333         2
  $       t1        t2        t3        t4      nloc
         1.0       1.0       1.0       1.0
  $
  *SECTION_SHELL
  $      sid    elform      shrf       nip     propt   qr/irid     icomp
           2             0.83333         2
  $       t1        t2        t3        t4      nloc
         2.0       2.0       2.0       2.0
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Nodes and Elements
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Outer edge nodes of the bottom plate (part 1)
  $$$$  are fixed in translation (tc = 7)
  $
  $
  *END

• contact.tied_nodes.box.k.gz
• contact.tied_nodes.box.k.zip