Description: Defines material properties for use in fully nonlinear (i.e., large strain and large rotation) hyperelastic analysis of rubber-like materials (elastomers) for isoparametric solid elements.
Format:
Example:
Field | Definition | Type | Default |
---|---|---|---|
MID | Material identification number. | Integer > 0 | Required |
MUi | Shear moduli related to distortional deformation. | Real | 0.0 |
ALPHAi | Exponents related to distortional deformation. | Real | 0.0 |
Di | Material constants related to volumetric deformation. | Real ≥ 0 | See Remark 2 |
RHO | Mass density in original configuration. | Real | 0.0 |
AV | Volumetric coefficient of thermal expansion. | Real | 0.0 |
TREF | Reference temperature for the calculation of thermal loads. | Real | 0.0 |
GE | Structural element damping coefficient. See Remarks 6 and 8. | Real | 0.0 |
NA | Order of the distortional strain energy polynomial function. | 0 < Integer ≤ 3 | 1 |
ND | Order of the volumetric strain energy polynomial function. | 0 < Integer ≤ 4 | 1 |
Remarks:
where
,
and
are principal stretches;
is the determinate of the deformation gradient; and 2D1 =
K at small strains, where
K is the bulk modulus.
is the current temperature and
is the initial temperature.