2021

2021

*MAT_002 (ORTHOTROPIC_ELASTIC)

LS-DYNA Input Interface KeywordThis model expresses a simple orthotropic elastic material.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
MAT_002 or MAT_ORTHOTROPIC_ELASTIC
`mat_ID`	$ρ_{i}$	`E11`	`E22`	`E33`	`υ12`
`G12`	`G23`	`G31`	`AOPT`
			`A1`	`A2`	`A3`
			`D1`	`D2`	`D3`

Definition

Field	Contents	SI Unit Example
`mat_ID`	Material identifier (Integer)
$ρ_{i}$	Initial density (Real)	$[\frac{kg}{m^{3}}]$
`E11`	Young's modulus in direction 1. (Real)	$[Pa]$
`E22`	Young's modulus in direction 2. (Real)	$[Pa]$
`E33`	Young's modulus in direction 3. (Real)	$[Pa]$
`υ12`	Poisson's ratio. (Real)
`G12`	Shear modulus in direction 12. (Real	$[Pa]$
`G23`	Shear modulus in direction 23. (Real	$[Pa]$
`G31`	Shear modulus in direction 31. (Real	$[Pa]$
`AOPT`	Choice of orthotropy axis = 2 orthotropy axis determined by `A1`, `A2`, `A3`, `D1`, `D2`, `D3` < 0 `AOPT` is number of DEFINE_COORDINATE_ to define orthotropic system (Integer)
`A1`, `A2`, `A3`	First orthotropy direction vector for `AOPT` = 2 (Real)
`D1`, `D2`, `D3`	With `A1`, `A2`, `A3` determines 12 planes of orthotropy for `AOPT` = 2 (Real)

Comments

This keyword maps to /MAT/LAW25 (COMPSH) and orthotropic element property (/PROP/TYPE9 (SH_ORTH), /PROP/TYPE6 (SOL_ORTH).
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.