Bend an already bent geometry about different axis

Bend an already bent geometry about different axis

Postby Christos » Mon Dec 04, 2017 2:05 am

Hello,

I am trying to tweak a geometry about both X and Y axes using the tweak volume bend command. The geometry is a thin volume. The first tweak about Y is pretty straightforward. When trying to bend again about X, the result I get is not what I want (though of course it is consistent with the command). So, first steps that are alright:

reset

brick x 20e3 y 10e3 z 1e3

move body 1 z 500

tweak vol 1 bend root 0 0 500 axis 0 1 0 direction 0 0 1 radius 10e3 angle 1

tweak vol 1 bend root 0 0 500 axis 0 -1 0 direction 0 0 1 radius 10e3 angle 1

Then I try:

tweak vol 1 bend root 0 0 500 axis 1 0 0 direction 0 0 -1 radius 5e3 angle 1

that tweaks half the volume, but its sides get stretched. I could use a root on the side and direction normal on the surface on that point and get a similar tweak that would stretch only the one side, and so on. I understand that direction should be normal to the surface so that the body is not stretched, but in a curved volume there are infinite normal vectors. To clarify what I would like, create this cylinder:

create cylinder height 21e3 radius 5e3

rotate vol 2 angle 90 about y

rotate vol 2 angle 180 about x

move body 2 z -5e3

tweak vol 2 bend root 0 0 0 axis 0 1 0 direction 0 0 1 radius 10500 angle 1

tweak vol 2 bend root 0 0 0 axis 0 -1 0 direction 0 0 1 radius 10500 angle 1


Notice that the tweaked volume touches the cylinder only @x=0. I would like the brick volume to be tweaked around the surface of the cylinder.

Could I somehow define a curve as a bending axis on the tweak-bend command? Could I vary the direction for each part of the volume? Any other commands I could use in order to bend the volume the way I want (plainly "downwards") or create it by sweeping surfaces etc?

Thanks!
Christos
 
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Joined: Thu Oct 26, 2017 6:35 am

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