2023.1

2023.1

*MAT_071 (CABLE_DISCRETE_BEAM)

LS-DYNA Input Interface KeywordThis keyword defines an elastic cable material with no stiffness in compression.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
MAT_071 or MAT_CABLE_DISCRETE_BEAM
`mat_ID`	$ρ_{i}$	`E`	`CID`	`F0`

Definition

Field	Contents	SI Unit Example
`mat_ID`	Material identifier. (Integer)
$ρ_{i}$	Initial density. (Real)	$[\frac{kg}{m^{3}}]$
`E`	> 0 Young's modulus. < 0 Stiffness. (Real)	$[Pa]$ or $[\frac{N}{m}]$
`CID`	Curve identifier for engineering stress versus engineering strain. = 0 No stiffness in compression. (Integer)
`F0`	Initial preload (tensile) force. (Real)	$[N]$

Comments

This keyword maps to /MAT/LAW113 (SPR_BEAM).
The material is only used with *SECTION_BEAM, ELFORM = 6 discrete beam elements.
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.