Shell II — Welcome to LS-DYNA Examples

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File shells2.k shows a cantilever beam modeled with shell elements using five integration points through thickness and user-defined integration rule. With this it is possible to use different stiffnesses in the cross-section of the shell.

Keywords

*CONTROL_CONTACT
*CONTROL_CPU
*CONTROL_DAMPING
*CONTROL_ENERGY
*CONTROL_OUTPUT
*CONTROL_SHELL
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_ELOUT
*DATABASE_EXTENT_BINARY
*DATABASE_HISTORY_NODE
*DATABASE_HISTORY_SHELL
*DATABASE_NODOUT
*DEFINE_CURVE
*ELEMENT_SHELL
*END
*INTEGRATION_SHELL
*INTERFACE_SPRINGBACK_DYNA3D
*INTERFACE_SPRINGBACK_NIKE3D
*KEYWORD
*LOAD_NODE_POINT
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*SET_PART
*TITLE

Reduced Input

  *KEYWORD
  *database_nodout
  3.e-3
  *interface_springback_dyna3d
  1
  *interface_springback_nike3d
  1
  *set_part
  1
  1
  *SECTION_SHELL
           1        16 0.0000000 5.0000000 0.0000000 
   0.5000000 0.5000000 0.5000000 0.5000000 0.0000000
  *integration_shell
  1,5,0
  $  part/mat 2 is twice as stiff as part/mat 1
  -1.,.125,2
  -.4,.25,1
   .0,.25,1
   .4,.25,1
   1.,.125,2
  *database_history_shell
  1
  *database_history_node
  11
  *database_elout
  3.e-3
  *TITLE
  shells.k (user integration rule)                                        
  *CONTROL_TERMINATION
   0.3997000         0 0.0000000         0 0.0000000
  *CONTROL_TIMESTEP
   0.0000000 0.0000000         0 0.0000000 0.0000000         0         0         0
  *CONTROL_SHELL
   0.0000000         0         0         0         0         0         0
  *CONTROL_DAMPING
           0 0.0000000 0.0000000 0.0000000 0.0000000         0 0.0000000         0
  *CONTROL_CONTACT
   0.0000000 0.0000000         0         0         0         0         0
           0         0         0         0 0.0000000         0         0         0
  *CONTROL_OUTPUT
           0         0         0         0 0.0000000         0         0
  *CONTROL_ENERGY
           1         2         1         1
  *DATABASE_BINARY_D3PLOT
   3.00000-3                   0
  *DATABASE_BINARY_D3THDT
   3.e-3 
  *DATABASE_EXTENT_BINARY
           0         0         5         1         0         0         0         0
           0         0         0         0         2         2
  *CONTROL_CPU
   0.0000000
  *MAT_ELASTIC
           1 7.00000-4 3.00000+5 0.3000000
  *MAT_ELASTIC
           2 7.00000-4 6.00000+5 0.3000000
  *PART
   
           1         1         1         0         0         0         0         0
  *PART
   
           2         1         2         0         0         0         0         0
  *NODE
  $
  *ELEMENT_SHELL
  $
  *DEFINE_CURVE
  $
  *LOAD_NODE_POINT
          11         2         3-1.0000000
          22         2         3-1.0000000
  *END

Figures

image01.gif

image02.gif

Animated Result

Result

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