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Thread: Holzapfel-Gasser-Ogden material for arteries

  1. #11
    Join Date
    Dec 2007
    Posts
    1,063

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    Hi SHU,

    Since a single fiber bundle is made up of multiple fibers, you can simulate the proportion of fibers in each bundle by scaling the fiber modulus ksi. For example, if 100% of the fibers produce a modulus of ksi=10 MPa, then 30% would be 3 MPa and 70% would be 7 MPa. That would be the way to apportion the modulus of different fiber families, even when they are not all oriented in the same direction.

    This is how the "continuous fiber distribution" materials in FEBio apportion the modulus in different fiber directions. A single value ksi is scaled in each fiber direction such that the integral over all fiber directions produces ksi.

    Best,

    Gerard

  2. #12
    Join Date
    Mar 2019
    Posts
    1

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    Hi Steeve,

    I am also working on an artery model that I import in FEBio Studio as "FE model", specifically a ".inp" file (note: the wall thickness in non-uniform). I tried to reproduce your suggestion for partitioning the mesh. When I select the mesh, it is of type "editable mesh"

    Capture.PNG

    If I select all the elements of the mesh and then I choose the "partition" option in the "edit mesh" panel, no parameters appear (picture below). Can you please guide me to partition the mesh?

    Capture1.PNG

    Best,
    Tasos

  3. #13
    Join Date
    Nov 2007
    Location
    Salt Lake City, UTAH
    Posts
    2,347

    Default

    Hi Tasos,

    I looks like you don't have the recent version of FEBio Studio. If you reach out to me via email (steve dot maas at utah dot edu) I'll send you the latest version.

    Cheers,

    Steve
    Department of Bioengineering, University of Utah
    Scientific Computing and Imaging institute, University of Utah

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