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Thread: Problem with febio post with hexahedra-27 nodes element

  1. #1
    Join Date
    Mar 2020
    Posts
    1

    Default Problem with febio post with hexahedra-27 nodes element

    Hello

    I created a feb file for one hexahedra-27 nodes element and use febio to read but FEBio post seems not displaying the cube correctly. See attached figure (cube1.zip). In addition I also created a h27 cube using febio_pre (file cube_sample_created_by_pre.feb) but febio detected negative Jacobian. Please let me know what can be going wrong.

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

    Default

    Hi,

    There was indeed a bug in rendering hex27 elements in both FEBioStudio and PostView. If you reach out to me (steve dot maas at Utah dot edu), I can send you a new version to try. Thanks for catching this.

    I can't reproduce the negative jacobian. The file cube_smaple_created_by_pre.feb does not contain any steps or boundary conditions, so FEBio does not do anything with it.

    Cheers,

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

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