On 7/2/20 10:06 PM, David F wrote:
*_Q2_:* why the system behaves as anisotropic if its local inhomogeneous
elastic properties are isotropic? If you have any comment or suggestion about
the problem of mesh-induced elastic anistropy in FEM, I would like to know it.
I don't know how exactly you choose your coefficient, but if you alternate
layers of isotropic materials, then you get an anisotropic material. Think
about layering styrofoam plates with steel plates -- the resulting stack of
layers is essentially incompressible under loads from the side (because the
steel plates provide the stiffness), but is quite compressible if you load it
from top and bottom (because the styrofoam layers will simply collapse).
Best
W.
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Wolfgang Bangerth email: [email protected]
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