Problem with mapped fibre orientation in "Fiber with Toe-Linear Response"

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  • bartbols
    Junior Member
    • Sep 2018
    • 20

    Problem with mapped fibre orientation in "Fiber with Toe-Linear Response"

    Hi,

    I’m trying to specify a mapped fibre orientation for the material “Fiber with Toe-Linear Response, Uncoupled Formulation” (fiber-pow-linear-uncoupled). The material is part of a solid mixture as follows:


    <Material>
    <material id="1" name="object1" type="uncoupled solid mixture">
    <k>1000000000</k>
    <solid type="Ogden">
    <c1>200000</c1>
    <m1>40</m1>
    </solid>
    <solid type="fiber-pow-linear-uncoupled">
    <E>281000000</E>
    <beta>4</beta>
    <lam0>1.03</lam0>
    <fiber type="map">FO_map</fiber>
    </solid>
    </material>

    </Material>

    And I have defined the fibre orientation map as follows:


    <MeshData>
    <ElementData data_type="vec3" elem_set="object_solid" name="FO_map">
    <e lid="1">1, 0, 0</e>
    <e lid="2">1, 0, 0</e>
    <e lid="3">1, 0, 0</e>
    ...
    </ElementData>
    </MeshData>​


    This mapping works well when I use different materials (e.g. the muscle material) but FEBio does not run when using the Fiber with Toe-Linear response material. I don't have issues running the model when using a fixed fiber orientation (specified as <fiber type="vector">1,0,0</fiber>) but I can't get the mapping to work. Unfortunately FEBio does not give an error message, it simply crashes. Am I doing something wrong or have I stumbled upon a bug?

    I've attached an example file in case it's helpful.

    Thanks, Bart
    Attached Files
  • maas
    Lead Code Developer
    • Nov 2007
    • 3573

    #2
    Hi Bart,

    It looks like this is a duplicate post. I responded to your other post.

    Best,

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

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