OOF: Finite Element Analysis of Microstructures

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Subsections


eds_el

This element is named after Ed Fuller, who suggested it4.2. It is an element which is isotropic in its elastic coefficients, but is orthorhombic in its thermal expansion coefficients. It can be used to simulate transformation strains or residual stresses where the elastic coefficients are not known precisely, but the expansions are known not to be isotropic.

Parameters

elastic coefficients
The elastic coefficients young and poisson have the same meaning as they do in the isotropic element (Section 4.5.1. [stress]

thermal expansion coefficients
The thermal expansion coefficients a1, a2, and a3 are the diagonal components of the thermal expansion tensor $\alpha_{ij}$. 4.3 [inverse temperature]

orientation
Without rotation, the thermal expansion coefficient a1 governs expansion in the $x$ direction, a2 in the $y$ direction, and a3 in the $z$ direction (out of the screen). See Section 4.3. [degrees]

Figure 4.4: Symmetry relations for point groups in the Tetragonal class. See Figure 4.2 for explanation of symbols.
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