*MAT_009 (NULL)
LS-DYNA Input Interface KeywordDefines a void material without stiffness.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
*MAT_009 or *MAT_NULL | |||||||
mat_ID | E |
Definition
Field | Contents | SI Unit Example |
---|---|---|
mat_ID | Material identifier. (Integer) |
|
Initial density. (Real) |
||
E | Young’s modulus. (Real) |
|
Poisson’s ratio. (Real) |
Comments
- This keyword maps to /MAT/LAW0 (VOID).
- This material has no stiffness. However, Young’s modulus and Poisson’s ratio are used to calculate contact stiffness.
- The density is used to calculate the mass of material which is added to the nodal mass.
- The option “_TITLE” can be added to the end of this keyword. When “_TITLE” is included, an extra 80 characters long line is added after the keyword input line which allows an entity title to be defined.