Reference for sheet metal bending force formula?

08 August 2017 0 10K Report

Hello,

I was trying to find reference or derivation process of sheet metal bending force (V bending, L bending or U bending). However, I was not able to find it. There are many websites and books that provide the formula, but without reference or derivation process. For example:

https://www.youtube.com/watch?v=uLoFs-8tiYQ

nptel.ac.in/courses/112106153/Module 7/Lecture 2/Module_7_Sheet_Metal-Forming-Lecture_2.pdf

http://www.engineersedge.com/dist_bend_line.htm

So can anyone help me find out the references or derivation process ?

Thanks.

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