Multiple Fibre Orientations in ply

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello,

 

As far as I know its only possible to assign a single direction to a composite ply. However, lots of plies used in the composite industry are not unidirectional. For example a 0-90 ply. In this ply half of the fibres has direction 0 and the other half 90 degrees. How can I mimic this in Hyperworks/optistruct for an FEA?

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Answers

  • Simon Križnik
    Simon Križnik Altair Community Member
    edited March 2019

    Hi,


    composite plies are modeled with MAT8 orthotropic material, where

    -E1 is Modulus of elasticity in longitudinal direction (also defined as fibre direction or 1-direction)

    -E2 is Modulus of elasticity in lateral direction (also defined as matrix direction or 2-direction)

     

    The material properties is what defines whether the ply is a uni-directional or bi-directional.

    Unidirectional plies have E1>>E2, while bi-directional have E1~= E2

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited March 2019

    Hi Ivan,

     

    Thanks for your Reply, this is exactly what I needed, :D/emoticons/default_biggrin.png' srcset='/emoticons/biggrin@2x.png 2x' title=':D' width='20' />

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