plot deformed/displaced shape

[hawkoli1987]

Dear All,

I have difficulties trying to generate displaced shape in pyMAPDL, while I can easily do so via PLDISP, 2 command in APDL, trying to apply it in pyMAPDL in jupyter notebook will generate errors like the following.

Could you show me the correct way of generating such display?

Thank you!
hawkoli1987

[natter1]

Might not be exactly what you want, but you could try:

mapdl.post1()
mapdl.set('last')
mapdl.upcoord(1)
mapdl.eplot()

mapdl.upcoord(-1)

[hawkoli1987]

thanks natter1! I'm able to do a/e/l/k plots and also the contour plots, but just have problem with deformation plots.

[mikerife]

Hi @hawkoli1987 can you describe the look/feel you are looking for and how what @natter1 showed does not match your needs/expectations? To me a deformation plot is an element plot with their updated node coordinates (updated by adding on the solved displacements to their locations). And the elements a single color. That is what the code snippet natter1 shows should produce. Mike

[hawkoli1987]

hi mike,

I did appreciate natter1's suggestion. It kind of works with the updated coordinate for each node but not completely. The following is what I've got when I tried it on my model (the same model which I shared in my Q&A post on large deflection)

As you may notice on nodes at bottom right, these nodes are supposed to be lifted up as they are not fixed to the bottom as the other nodes at the bottom left. Instead they were shown as completely in their original shape and location. Although the element edges in the middle (at the transition between fixed and unfixed elements) are shown slanted, which kind of make sense, but the overall plot wasn't really intuitive as a deformation plot would have been.

The other example is the one you've produced for me when answering my post on large deflection. That is exactly what I want. Could you teach me how to generate it?

Thanks!
hawkoli1987

[mikerife]

Hi @hawkoli1987 in the get_Ue function there is a CMSEL that selects a sub-set of nodes. That state is carried over so you just need to select all nodes prior to scaling them with the UPCOORD command. I used a esize=2 and ran just the single case with the mesh refinement reactivated, then used this:

mapdl.post1()
mapdl.allsel()
mapdl.set('last')
mapdl.upcoord(1)
mapdl.eplot(cpos='xy', background='black', color='blue',edge_color='white')
mapdl.upcoord(-1)

To produce this PyMAPDL eplot (well, I manually zoomed/panned to see the lower right corner!):

Mike

[hawkoli1987]

Thanks so much Mike and Natter1! Apologize for the mistake of neglecting my partial selection state...

[mikerife]

Hey @hawkoli1987 no worries! There is always a bit of 'what do I have selected....' when writing these scripts manually. Mike