A sheet of metal when cold and bent through 90 degrees undergoes stretching of metal at the bend. I think I am right in saying no compression occurs.
Lets take a simple portrait shape 100mm tall x 50mm wide, 2mm thick from our shelf of metal bits !..and bend it on our workbench through 90degs and internal radius 5mm at a line parallel to short edge half way along its length (so 50mm down from top), we now have an L shape each face 50mm square ish.
If we then model this as a solid, then wish to show it as a plan before bending, would UnrollSrf or Smash be best to create the rectangle, which should be our exact 100 x 50 again. We dont want the length to be the stretched side of the metal, or the centre of the metal.
I tried both and explode and assembling bits gave me the pre bend shape.
is there a way of doing this without having to place bits together and measure and do maths, just get a 2D plan of the unbent metal object ?