*MAT_027 (MOONEY-RIVLIN_RUBBER)

LS-DYNA Input Interface KeywordDefines a Mooney-Rivlin isotropic hyperelastic incompressible material.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_027 or *MAT_MOONEY-RIVLIN_RUBBER
mat_ID ρ i υ A B
Length Width Thickness LCID  

Definition

Field Contents SI Unit Example
mat_ID Material identifier.

(Integer)

ρ i Initial density.

(Real)

[ kg m 3 ]
A, B Mooney-Rivlin Material constants.

(Real)

 
υ Poisson’s ratio.

(Real)

[ Pa ]
Length Sample length.

(Real)

[ m ]
Width Sample width.

(Real)

[ m ]
Thickness Sample thickness.

(Real)

[ m ]
LCID Function identifier of Force versus elongation.

(Integer)

[ N ]

Comments

  1. This maps to /MAT/LAW69, if LCID is defined otherwise it 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.