*MAT_034 (FABRIC)

LS-DYNA Input Interface KeywordThis keyword defines an orthotropic elastic material with softening in compression.

Format

Field	Contents	SI Unit Example
`mat_ID`	Material identifier (Integer)
$ρ_{i}$	Initial density (Real)	$[\frac{kg}{m^{3}}]$
`E1`, `E2`	Young’s modulus in material directions 1 and 2 (Real)	$[Pa]$
`v12`	Poisson’s ratio between directions 1 and 2 Default=0 (Real)
`G12`, `G23`, `G32`	Shear modulus in corresponding directions (Real)	$[Pa]$
`RE`	Stiffness reduction in compression option = 0 No stiffness reduction in compression = 1 Stiffness reduction in compression (Integer)
`AOPT`	Material axis flag = 0 (Default) locally orthotropic axes defined by Node = 2 globally orthotropic axes defined by Vector = 3 locally orthotropic axes defined with element normal `AOPT` < 0 The absolute value \|`AOPT`\| is a coordinate system identifier which defines the orthotropic directions (Real)
`A1`, `A2`, `A3`	Vector defining first orthotropy direction for `AOPT`= 2 (Real)
`V1`, `V2`, `V3`	A vector which in combination with element normal defines the first orthotropy direction for `AOPT` = 3 (Real)

This keyword maps to /MAT/LAW19 (FABRI).
The option “_TITLE” can be added to the end of this keyword. When “_TITLE” is included, an extra 80 character long line is added after the keyword input line which allows an entity title to be defined.