OOF: Finite Element Analysis of Microstructures
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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.
- The cubic Young's modulus [stress].
- The cubic Poisson's ratio [dimensionless].
- The anisotropy factor, [dimensionless].
- The coefficient of thermal expansion.
In cubic materials
off-diagonal terms vanish. [inverse temperature]
- The orientation of the crystalline axes. See Section 4.3. [degrees]
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