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How to bend a plane

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How to bend a plane
I am trying to model a LCD screen with a ribbon cable and need to bend in back on itself. How can I take a sheet of material and bend it 180 degrees with a certain radius
180° bending
To bend a plane is impossible in Cartesian system. The plane is plane. ;)
With a small "cheat" this is not so complicated. Maybe this is not cheat, because in the real case there is the same situation.
So I've extruded a piece of 10 thick steel sheet with 180° bend. There is a small gap between the bent and unbent branches. It can be even smaller than 0,1.
The Varicad made wonderful flat pattern from it. (my bend table - which is not the original Varicad type - is valid for steels)