Airbag I

In this example a closed cylinder is deformed. *AIRBAG_SIMPLE_AIRBAG_MODEL keyword is used to control the volume inside.

*AIRBAG_SIMPLE_AIRBAG_MODEL
*BOUNDARY_SPC_NODE
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE_ABSTAT
*DATABASE_BINARY_D3PLOT
*DATABASE_HISTORY_NODE_SET
*DATABASE_HISTORY_SHELL
*DEFINE_CURVE
*DEFINE_CURVE
*ELEMENT_SHELL
*END
*KEYWORD
*LOAD_SHELL_ELEMENT
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_NODE_LIST
*SET_PART_LIST
*TITLE

  *KEYWORD
  *TITLE
  Deformation of a Cylinder
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $ PROGRAM CONTROL & OUTPUT SECTION
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  *CONTROL_TIMESTEP
  0, 0.9
  *CONTROL_TERMINATION
  0.005
  *SET_NODE_LIST
  11
  388, 389
  *DATABASE_HISTORY_NODE_SET
  11
  *DATABASE_HISTORY_SHELL
  340
  *DATABASE_BINARY_D3PLOT
   1.000E-04
  *DATABASE_ABSTAT
   1.000E-06
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $ DEFINE MATERIALS, SECTIONS, PARTS
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  *PART
  SHELL:
  2, 1, 1
  *MAT_ELASTIC
  1, 1.497e-4, 0.1985e8, 0.30
  *SECTION_SHELL
  1, 2
  0.14, 0.14, 0.14, 0.14
  *MAT_ELASTIC
  1, 1.497e-4, 0.1985e8, 0.30
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  *PART
  control volume:
  3, 2, 2
  *SECTION_SHELL
  2, 5
  0.14, 0.14, 0.14, 0.14
  *MAT_ELASTIC
  2, 1.497e-4, 0.1985e8, 0.3
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $ DEFINE LOADING                   
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  *LOAD_SHELL_ELEMENT
         710         1 -10000.00 0.0000000
         410         1 -10000.00 0.0000000
  *DEFINE_CURVE                      
  1
  0, 0
  0.005, -10.0
  1, -10.0
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  *SET_PART_LIST
  11
  3
  *AIRBAG_SIMPLE_AIRBAG_MODEL
  $      sid    sidtyp    
          11        99
  $rbid!=0 i
  $        n
  $       cv        cp         t      lcid        mu         a        pe        ro
   1.736E+03 2.430E+03 1.200E+03         2 7.000E-01 0.000E+00 1.470E+01 3.821E-06
  $        i
  $      lou
  
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  *DEFINE_CURVE
  $     lcid      
           2       
             0.000E+00           0.000E+00
             1.000E+10           0.000E+00
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  *NODE
  $
  *ELEMENT_SHELL
  $
  *BOUNDARY_SPC_NODE
  $
  *END