How Do Hanging Nodes Affect Adaptive Meshing in LS-DYNA?

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bach_viet90
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Hello everybody!
I have just use Ls-Dyna last week and when I use Adaptive meshing I got that.
Capture-1.png


So what are elements the new node belong to 1, 2 or 3. I used type shell 163 - 4 nodes element!
 
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It's called a hanging node. It's very common to use this in adaptive mesh refinement because you don't need to remesh, you just split an element into 2,3 or 4 smaller elements (in this case, Ansys is always using subdivision into 4 cells).
Each element has 4 nodes, but not every node needs to border 4 elements.
The node belongs to element 2 and 3, not to element 0, although element 0 knows that there is a bordering element that has been split in two. You need this of course to calculate the fluxes over the face.