[Mrt23]

hello, Ansa users.

i have question.
if i mesh my body by polihedral mesh and try to use tool edge to curve i couldn't do it.
how can i fix it?
is it possible?
i want to take edges from polihedral elements and convert these to curves.

thanks a lot.

[vangelis]

You should try
Perimeters>Feat2Curve

[Mrt23]

Originally Posted by vangelis

You should try
Perimeters>Feat2Curve

thanks, i will try in the evening.

[Mrt23]

it works.
but i want to do perimeters to curve inside volume too.
do you know how to do it?=)

[vangelis]

There is an option
Draw Interior of Solid Mesh in F11 window in Presentation Parameters but this does not apply to polyhedral mesh unfortunately....

Why do you want to create 3D curves out of the poly elements?

[Mrt23]

i want to create beams on polihedral edges and delete polihedrals.=)

[vangelis]

I see you want to create a foamy structure lets say.

How many polyhedra cells do you have?

If each poly is in a different PID then you can create Curves from their edges.

If the elements are many you will need to write a python script to assign new PID to each cell

[Mrt23]

i see.
thanks a lot.
it's for my friend.

[vangelis]

Just a note
The workaround I suggested does not seem to work unfortunately.
Even if you can then see the internal edges the function Feat2Curve cannot select them so you cannot creare 3D curves....

The right workaround is the following

When you have your poly mesh ready
use the function
Mesh>Elements>VoltoShell [Interior]

This will create interior shell elements of all the internal poly facets
Then you can use Perimeters>Feat2Curve as you will be able to select the internal edges

Hope this works for you

[Mrt23]

wow!
but skin volume_to_shell (area) doesn't work with polihedral.
i have tried it many times.
hexa/piramid/tetra work easy, but polihedral doen't work unfortunately=(

[vangelis]

The VolShell [Interior] should be applied with box selection to all interior facets.
You do not have to use area selection for VolShell Interior. You already have shell
elements on the outside skin of the volume.

[Mrt23]

it works!
thanks a lot!

[vangelis]

you are welcome