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  1. Chantzypoo

    Meshing Composites in ANSYS

    Although I haven't tried it yet, I was informed that results are much nicer if you use the SHELL99 elements with the material ABD matrix instead of using the layer feature. I am currently working out my various ABD matrices now and should be able to try it out later this week. I am also...
  2. Chantzypoo

    Transversely Isotropic?

    I am indeed using an old version of hdbk-17. I have decided to go the micromechanical route to get an individual ply characterization, and then approximating the weave as a 0/90 laminate. Thanks for the reply.
  3. Chantzypoo

    Transversely Isotropic?

    The question is, can I treat a Carbon/Epoxy pre-preg fabric as transversely isotropic? If not, how do you determine the shear modulus of the fabric, G12? MIL-HDBK-17 does not list G12 in the tables of properties for various pre-pregs, so I assume there must be an easy way to determine it, such...
  4. Chantzypoo

    Meshing Composites in ANSYS

    I am trying to model a composite plate in ANSYS using SHELL91 or SHELL 99 elements and it seems that the results are highly dependent on the mesh no matter how fine or 'clean' the mesh is. I have tried many variations of mapped and free meshes with different area divisions, and I seem to get...

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