OOF: Finite Element Analysis of Microstructures
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4.5.11. Zimmer2 differs from zimmer in the same way that griffith2 differs from griffith: the zimmer element mutates if the total stored elastic energy exceeds the surface energy cost of a crack whereas the zimmer2 element mutates if the elastic energy due to the maximum principal stress exceeds the surface energy.
- The orientation of the hexagonal element before it mutates.
If unrotated (orientation= 0), a hexagonal element is
isotropic in the plane (the plane of the screen), with the
crystalline -axis in the direction (out of the screen).
See Section 4.3.
- thermoelastic coefficients
- Before mutation, the components of the stiffness matrix are those of
the hexagonal element (Section 4.5.4): c11, c12, c13, c33, and c44. The two independent coefficients
of thermal expansion are alpha11 and alpha33.
- The surface energy of the crack.
- The factor which multiplies the rotated stiffness matrix's
component during a mutation. [dimensionless]
- The factor which multiplies the rotated stiffness matrix's remaining
components for at least one of ijkl=z during a
- If true, an element which has been damaged during one mutate command will not be damaged further on subsequent mutate
commands. If false, the knockdown factors may be applied multiple
times. Default: false
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