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#finiteelementanalysis — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #finiteelementanalysis, aggregated by home.social.

  1. Playing with of an "expansion mesh" like structure. The geometry, mesh and boundary condition creation, as well as the FEA analysis, all occur automatically.

    This simulation is still elastic, next step is to add plasticity.

  2. So satisfying to finally reach 100% code coverage for testing!

    Hoping to publish paper on Comodo by the end of the year. If you are into help to contribute to Comodo.jl and FEBio.jl and you'll be one of the authors!

    github.com/COMODO-research/Com

  3. Interesting paper by @jedbrown et al.

    doi.org/10.48550/arXiv.2401.13

    For computational mechanics/physics, if you code by just punching in the equations from the textbooks directly, the physics should work, but computationally the way you evaluate the quantities may be unstable. This paper lists some recipes to avoid these.

    Mostly small strain problem, but still feels icky to leave in.

    @mofem @likask @koehlerson

  4. New : "Experimental and Computational Analysis of Energy Absorption Characteristics of Three Biomimetic Lattice Structures Under Compression" arxiv.org/abs/2308.14452

  5. Saw a paper on a soft robotic star thing, and had to check. Yep I can confirm, it looks like it can grab things.

    Paper: doi.org/10.1002/aisy.202200435

    Here is a link to my fully parameterized implemention with + : gibboncode.org/html/DEMO_febio

  6. GIBBON is ready for ! Heading to Paris tomorrow and can't wait to present the latest implementations and upgrades for FEBio4.

    If you are attending the workshop, upgrade GIBBON to the latest version:
    gibboncode.org/

    cmbbe-symposium.com/2023/works

  7. Checking out "Taubin" smoothing. Looks great for smoothing voxel derived meshes. Video shows voxel mesh (red) of a femur and the Taubin smoothed surface retrieved (white).

    One of Taubin's papers: doi.org/10.1109/ICCV.1995.4668

    GIBBON implementation: gibboncode.org/html/HELP_smoot

  8. Here the strain that you think you are applying (red curve) and the real strain in the middle layer (green curve) are plotted over time. As you can see a compressive Z-strain builds up during clamping which may offset the strain graph a lot.
    Note this is Green-Lagrange strain. The linear tensile strain intended to be applied is 30%, the linear clamping strain is -30%.

    gibboncode.org/html/DEMO_febio

  9. Indentation with a twist.

    The rigid ball pushes into the rubber-like hyperelastic cube while also spinning. Friction then transfers torsional forces to the cube as well.


    gibboncode.org/html/DEMO_febio

  10. New with collaborators Shaiv Parikh et al.

    "Biomechanical characterisation of thoracic ascending aorta with preserved pre-stresses"

    doi.org/10.1101/2022.12.02.518

    Features some lovely automated meshing and with GIBBON

  11. Here is a nice review paper on: "What Kelvin might have written about Elasticity"
    doi.org/10.1111/j.1365-2478.20

    And more on benefits for use with :
    arxiv.org/pdf/1605.09606

  12. A simple demo for automated design, meshing and of a hyperelastic tire in contact with a road surface.

    GIBBON implementation: gibboncode.org/html/DEMO_febio

  13. Lovely new paper by PhD student I co-supervise: Mahtab Vafaeefar (Twitter: @MahtabVfa)

    Have a look if you are into: lattice structures, trabecular bone, and/or

    "A Morphological, Topological and Mechanical Investigation of Gyroid, Spinodoid and Dual-Lattice Algorithms as Structural Models of Trabecular Bone"

    link
    arxiv.org/abs/2211.13036

    Journal link
    doi.org/10.1016/j.jmbbm.2022.1

    Uses GIBBON codes for lattice structure+model creation

  14. Automated meshing of a bifurcation (e.g. for blood vessel ) with hexahedral elements using toolbox.

    1) Take a cylinder
    2) Cut a hole at bifurcation curve
    3) Create direction vectors for surface "departure and arrival"
    4) Use smooth bezier spline based lofting
    5) Thicken quads to form hex. elements.

    Demo rendered here:
    gibboncode.org/html/DEMO_mesh_

    Bezier approach was inspired by @acegikmo 's spline work