*MAT_061 (KELVIN_MAXWELL_VISCOELASTIC)

LS-DYNA Input Interface KeywordDefines an isotropic, visco-elastic material for solid elements.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
*MAT_061 or *MAT_KELVIN_MAXWELL_VISCOELASTIC
mat_ID	${\rho }_i$	K	G0	G_INF	BETA

Definition

Field	Contents	SI Unit Example
mat_ID	Material identifier. (Integer)
${\rho }_i$	Initial density. (Real)	$\left[\frac{\text{kg}}{{\text{m}}^{\text{3}}}\right]$
K	Bulk coefficient. (Real)	$\left[\text{Pa}\right]$
G0	Short term shear modulus. (Real)	$\left[\text{Pa}\right]$
G_INF	Long term shear modulus. (Real)	$\left[\text{Pa}\right]$
BETA	Decay coefficient. (Real)	$\left[\frac{\text{1}}{\text{s}}\right]$

Comments

1. This keyword maps to /MAT/LAW40 (KELVINMAX).
2. K, G0, and G_INF must be defined.