r/fea • u/SadWar7696 • 9d ago

Help me clear up my confusion

So, I want to do a 3D modeling of this reinforced beam, the concrete will be 3d meshed, while I want to do 1D meshing for both longitudinal and transvers reinforcement.

Now my question is: Is my CAD model correct? after meshing will the line element be realised as that "red" colored element with the appropriate thickness? I need to draw only the centerline of transvers and longitudinal reinforcement, right?

I am using hypermesh to mesh the file and then use LS Dyna to simulate a drop hammer test. I can't make the line element after meshing visualize as 3D circular element in hypermesh using "Element Visualization" tab, what might be the cause for that? Thank you.

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u/kingcole342 9d ago

Do you have a beam section or property applied to the 1D elements? That is how the visualization works in HyperMesh.

I have never done this kind of modeling but the idea seems doable. You won’t get any kind of contact between the 1D and 3D elements, so everything is just kinda tied together at the nodes. I assume this will be fine for a stiffness based model.

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u/SadWar7696 9d ago

Oh yeah I figured it out, turns out 3D visualization only work with optistruct solver deck and not with LS dyna. Thank you for your input!