Is there a way, by knowing the loss at the bends of a sheet metal bend at 90° (test done on a bending machine) with solidworks , to be able to know the loss at the bends of sheet metal with bends at angles different than 90° with the same ve, ri, and thickness, I know if we take the method with the K factor 80° and 100° we and about good but beyond that it is no longer the case, do we have to go through the bending machine for tests there is no other way?
Your painting is quite Ac cobra, but having also done a lot of tests with the folder of my company, we don't have the same results depending on the material.
My method will seem weird but I always put 0.273 of factor K, with the bend radius equal to the thickness of the sheet. Which means that my development corresponds to what we learn at school, (outer sides) - (a thickness). I work in a small locksmith/boiler company and I haven't had any problems with the guys in the workshop. We don't use a digital folding machine either, so even if the bending radius doesn't correspond between what is done in the workshop and the plan, the development is fine.
To answer the question directly, the answer is no.
I have a customer who works with the panel supplied with his machine, for example for a sheet of 2, the loss is 3.5 at 90° and 1 at 135° (inside angle).
So you have to test every thickness of every material you use.