Blame It on the Sockets: Forensic Analysis of the Arecibo Collapse - Nearly three years after the rapid unplanned disassembly of the Arecibo radio tele... - https://hackaday.com/2023/08/29/blame-it-on-the-sockets-forensic-analysis-of-the-arecibo-collapse/ #finiteelementanalysis #neutronimaging #radiotelescope #engineering #collapse #forensic #arecibo #failure #spelter #socket #cable #news #zinc

New #preprint : "Experimental and Computational Analysis of Energy Absorption Characteristics of Three Biomimetic Lattice Structures Under Compression" https://arxiv.org/abs/2308.14452
#finiteelementanalysis #biomechanics #lattice

GIBBON is ready #CMBBE2023 ! 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:
https://www.gibboncode.org/

#opensource #biomechanics #FiniteElementAnalysis #ComputationalMechanics #MechanicalEngineering

https://www.cmbbe-symposium.com/2023/workshops/

#opensource #GeometryProcessing #meshing #finiteelementanalysis

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: https://doi.org/10.1109/ICCV.1995.466848

#opensource GIBBON implementation: https://www.gibboncode.org/html/HELP_smoothTaubin.html

#biomechanics #FiniteElementAnalysis #meshing #GeometryProcessing

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%.

#opensource #FiniteElementAnalysis

https://www.gibboncode.org/html/DEMO_febio_0065_clamp_tension_test.html

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.

#opensource #GIBBON #FEBio #FiniteElementAnalysis
https://www.gibboncode.org/html/DEMO_febio_0028_sphere_indentation_friction_twist.html

New #openaccess #preprint with collaborators Shaiv Parikh et al.

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

https://doi.org/10.1101/2022.12.02.518810

Features some lovely automated meshing and #FiniteElementAnalysis with GIBBON

Here is a nice review paper on: "What Kelvin might have written about Elasticity"
https://doi.org/10.1111/j.1365-2478.2011.01049.x

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

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

#opensource GIBBON implementation: https://www.gibboncode.org/html/DEMO_febio_0079_tire_load_01.html

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

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

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

#openaccess link
https://arxiv.org/abs/2211.13036

Journal link
https://doi.org/10.1016/j.jmbbm.2022.105584

Uses #opensource GIBBON codes for lattice structure+model creation

Automated meshing of a bifurcation (e.g. for blood vessel #FiniteElementAnalysis) with hexahedral elements using #opensource #GIBBON 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:
https://www.gibboncode.org/html/DEMO_mesh_bifurcation_cut_loft_branch.html

Bezier approach was inspired by @acegikmo 's spline work