!ELASTIC

Definition of an elastic material

Parameters

TYPE = ISOTROPIC (Default) / ORTHOTROPIC / USER
DEPENDENCIES = 0 (Default) / 1
INFINITESIMAL    If specified, the small-deformation assumption is applied

** 2nd and subsequent lines **

When TYPE = ISOTROPIC

(2nd line) YOUNGS, POISSION, Temperature

Variable name	Attribute	Description
YOUNGS	R	Young's modulus
POISSON	R	Poisson's ratio
Temperature	R	Temperature (required when DEPENDENCIES=1)

When TYPE= ORTHOTROPIC

Note: When using TYPE=ORTHOTROPIC, a local coordinate system must be specified for the corresponding !SECTION with the ORIENTATION= parameter. If ORIENTATION= is omitted, the solver terminates abnormally at runtime.

(2nd line) E1, E2, E3, ν12, ν13, ν23, G12, G13, G23, Tempreature

[ \begin{bmatrix} \varepsilon_{11} \\ \varepsilon_{22} \\ \varepsilon_{33} \\ 2\varepsilon_{12} \\ 2\varepsilon_{23} \\ 2\varepsilon_{31} \end{bmatrix} = \begin{bmatrix} 1/E_1 & -\nu_{12}/E_1 & -\nu_{13}/E_1 & 0 & 0 & 0 \\ & 1/E_2 & -\nu_{23}/E_2 & 0 & 0 & 0 \\ & & 1/E_3 & 0 & 0 & 0 \\ & & & 1/G_{12} & 0 & 0 \\ & symmetric & & & 1/G_{23} & 0 \\ & & & & & 1/G_{31} \end{bmatrix} \begin{bmatrix} \sigma_{11} \\ \sigma_{22} \\ \sigma_{33} \\ \sigma_{12} \\ \sigma_{23} \\ \sigma_{31} \end{bmatrix} ]

When TYPE = USER

(Lines 2-10) v1, v2, v3, v4, v5, v6, v7, v8, v9, v10