# Bar Impacting a Rigid Wall — Welcome to LS-DYNA Examples

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A deformable copper bar impacts a rigid wall at high speed. Differences in contact modelling via *RIGIDWALL_PLANAR and *CONTACT_AUTOMATIC_SURFACE_TO_SURFACE can be studied. Solutions with constant stress solid (elform 1), fully integrated S/R solid (elforms 1, -1, -2), 1 point tetrahedron (elform 10), 1 point nodal pressure tetrahedron (elform 13) and 1 point ALE (elform 5) can be studied. Example 27 from Introductory Manual for LS-DYNA Users by James M. Kennedy.

## Keywords

```*CONTACT_AUTOMATIC_SURFACE_TO_SURFACE
*CONTROL_ALE
*CONTROL_CONTACT
*CONTROL_ENERGY
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE_BINARY_D3PLOT
*DATABASE_GLSTAT
*DATABASE_MATSUM
*DATABASE_RWFORC
*DATABASE_SLEOUT
*ELEMENT_SOLID
*END
*HOURGLASS
*INITIAL_VELOCITY_GENERATION
*KEYWORD
*MAT_PLASTIC_KINEMATIC
*PART
*RIGIDWALL_PLANAR
*SECTION_SOLID
*TITLE```

## Reduced Input

```*KEYWORD
*TITLE
Copper Bar Impacting a Rigidwall
*CONTROL_TERMINATION
8.000e-02         0       0.0       0.0       0.0
*CONTROL_TIMESTEP
0.0  0.800000         0       0.0       0.0
0.0         0         0
*CONTROL_CONTACT
0.100000       0.0         2         2         0         0         1
0         0         0         0   4.00000
0.0       0.0       0.0       0.0       0.0       0.0       0.0
0         0         0
*CONTROL_ENERGY
2         2         2         2
*DATABASE_GLSTAT
5.0000e-04         1
*DATABASE_MATSUM
5.0000e-04         1
*DATABASE_SLEOUT
5.0000e-04         1
*DATABASE_RWFORC
5.0000e-04         1
*DATABASE_BINARY_D3PLOT
1.0000e-03
*PART
1         1         1         0         1
*SECTION_SOLID
1         1
*MAT_PLASTIC_KINEMATIC
1 8.930e-03 1.170e+05   0.35000 4.000e+02 1.000e+02  1.000000
0.0       0.0       0.0       0.0
*HOURGLASS
1         0       0.0         0       0.0       0.0       0.0       0.0
*RIGIDWALL_PLANAR
0         0         0
0.000000  0.000000 -0.050000  0.000000  0.000000  1.000000  0.000000  0.000000
*INITIAL_VELOCITY_GENERATION
1         2       0.0       0.0       0.0  -227.000         0         0
0.0       0.0       0.0       0.0       0.0       0.0         0         0
*ELEMENT_SOLID
*END
```