# OOF: Finite Element Analysis of Microstructures

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##

cubic

These are elements with cubic symmetry. According to figure
4.2 there are three independent entries in the
stiffness matrix. We pick those independent coefficients with a
somewhat standard convention for the cubic Young's modulus (),
Poisson's ratio () and the anisotropy factor (
) which makes the matrix form of
look like:
This is equivalent to the isotropic stiffness matrix when .

The two-dimensional stiffness matrix depends on whether *planestrain*
is true or false.

### Parameters

*young*- The cubic Young's modulus [stress].
*poisson*- The cubic Poisson's ratio [dimensionless].
*anisotropy*- The anisotropy factor, [dimensionless].
*alpha*- The coefficient of thermal expansion.
In cubic materials
; all
off-diagonal terms vanish. [inverse temperature]
*orientation*- The
*orientation*of the crystalline axes. See Section 4.3. [degrees]

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