*MAT_092 (SOFT_TISSUE_VISCO)

LS-DYNA Input Interface KeywordThis material is used to represent biological soft tissues such as ligaments based on Mooney-Rivlin formulation.

Visco-elasticity is modeled using Prony series.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_092 or *MAT_SOFT_TISSUE_VISCO
mat_ID ρ i mu_1 mu_2
G1 G2 G3 G4 G5 G6
tau_1 tau_2 tau_3 tau_4 tau_5 tau_6

Definition

Field Contents SI Unit Example
mat_ID Material identifier.

(Integer)

ρ i Initial density.

(Real)

[ kg m 3 ]
mu_1 - mu_2 Mooney-Rivlin coefficient.

(Real)

[ Pa ]
G1 - G6 Prony viscous terms.

(Real)

[ Pa ]
tau_1 - tau_6 Relaxation time corresponding to each Prony term Gi. [ s ]

Comments

  1. This keyword maps to /MAT/LAW42 (OGDEN).
  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.