OOF: Finite Element Analysis of Microstructures

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A material with trigonal symmetry, with 7 independent elastic constants and two independent coefficients of thermal expansion. It represents the crystal symmetries (3) and $(\bar 3)$. See figure 4.3, and also Sections 4.5.8 and 4.5.12.


The orientation of the crystalline axes. See Section 4.3. [degrees]

elastic coefficients
The components of the stiffness matrix are specified by the values of c11, c12, c13, c14, c15, c33, and c44. [stress]

thermal expansion coefficients
The three independent coefficients of thermal expansion are specified by alpha11 and alpha33. [inverse temperature]

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