# Forging A — Welcome to LS-DYNA Examples

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This is a Lagrangian model of a forging operation in plane strain. Calculation aborts with error due to negative volume of some elements.

## Keywords

```*BOUNDARY_PRESCRIBED_MOTION_RIGID
*CONTACT_SURFACE_TO_SURFACE
*CONTACT_SURFACE_TO_SURFACE
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_BNDOUT
*DEFINE_CURVE
*ELEMENT_SHELL
*ELEMENT_SOLID
*END
*KEYWORD
*MAT_INV_HYPERBOLIC_SIN
*MAT_RIGID
*NODE
*PART
*SECTION_SHELL
*SECTION_SOLID```

## Reduced Input

```  *KEYWORD
*DATABASE_BNDOUT
0.01
*CONTROL_TERMINATION
2.0000000
*DATABASE_BINARY_D3PLOT
0.1000000
*MAT_INV_HYPERBOLIC_SIN
1,    3.14e-1,     1.0e+4,     3.0e-1,  1260.0e+0,    4.55e+0
0.17237, 3.8, 3.45e+8, 1.188e+6, 40.8825, 1.0e-6
*SECTION_SOLID
1,1
*PART

1, 1, 1, 0, 0, 0, 2, 0
*MAT_RIGID
2,    3.14e-1,     1.0e+4,     3.0e-1
1.0,     1.0e+0, 7.0

*SECTION_SHELL
2, 1
1.0, 1.0, 1.0, 1.0
*PART

3, 2, 2, 0, 0, 0, 0, 0
*PART

4, 2, 2, 0, 0, 0, 0, 0
*DEFINE_CURVE
1, 0, 1.0, 1.0, 0.0, 0.0, 0
0.0,    -1.0e+0
10.0,   -1.0e+0
*BOUNDARY_PRESCRIBED_MOTION_RIGID
3, 2, 0, 1, 1.0, 0
*BOUNDARY_PRESCRIBED_MOTION_RIGID
4, 2, 0, 1, 1.0e-9, 0
*CONTACT_SURFACE_TO_SURFACE
3,1,3,3

*CONTACT_SURFACE_TO_SURFACE
4,1,3,3

*NODE
\$
*ELEMENT_SOLID
\$
*ELEMENT_SHELL
\$
*END```