*MAT_030 (SHAPE_MEMORY)

LS-DYNA Input Interface KeywordDefines a super-elastic memory shape alloy material (SMA) compatible with integrated beam, solid and shell elements.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
*MAT_030 or *MAT_SHAPE_MEMORY
mat_ID	${\rho }_i$	E	$\nu$
SIG_ASS	SIG_ASF	SIG_SAS	SIG_SAF	EPSL	ALPHA	YMRT

Definition

Field	Contents	SI Unit Example
mat_ID	Material identifier. (Integer)
${\rho }_i$	Initial density. (Real)	$\left[\frac{\text{kg}}{{\text{m}}^{\text{3}}}\right]$
E	Young’s modulus. (Real)	$\left[\text{Pa}\right]$
$\nu$	Poisson’s ratio. Default = 0 (Real)
SIG_ASS	Material parameter defining the start of phase transformation from austenite to martensite (AS). (Real)	$\left[\text{Pa}\right]$
SIG_ASF	Material parameter defining the end of phase transformation from austenite to martensite (AS). (Real)	$\left[\text{Pa}\right]$
SIG_SAS	Material parameter defining the start of phase transformation from martensite to austenite (SA). (Real)	$\left[\text{Pa}\right]$
SIG_SAF	Material parameter defining the end of phase transformation from martensite to austenite (SA). (Real)	$\left[\text{Pa}\right]$
EPSL	Maximum residual strain. (Real)
ALPHA	Material parameter measuring the difference in response between tension and compression. Default = 0 (Real)
YMRT	Martensite Young's modulus. Default = 0.0 (Real)	$\left[\text{Pa}\right]$

Comments

1. This keyword maps to /MAT/LAW71.
2. 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.