*EOS_GRUNEISEN

LS-DYNA Input Interface KeywordDefines a Gruneisen equation of state.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
*EOS_GRUNEISEN
eos_ID	C	S1	S2	S3	GAMMA0	E0	ALPHA
Rho0

Definition

Field	Contents	SI Unit Example
eos_ID	Material identifier. (Integer)
C	Sound speed. (Real)	$\left[\frac{\text{m}}{\text{s}}\right]$
S1	First material constant. (Real)
S2	Second material constant. (Real)
S3	Third material constant. (Real)
GAMMA0	Linear energy coefficient.
ALPHA	Nonlinear energy coefficient.
E0	Initial energy per unit volume.	$\left[\frac{\text{J}}{{\text{m}}^{\text{3}}}\right]$
Rho0	Reference density.	$\left[\frac{\text{kg}}{{\text{m}}^{\text{3}}}\right]$

Comments

1. This keyword maps to /EOS/GRUNEISEN.
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.