Bolt Tightening of a Bar Mounted Clamp

[KieranMac2000]

Hi guys,
First time writer but I'm looking for some help.
Ive found this website that ive used to calculate the forces in a bar clamp but I really want to know the equations that drive it.
If anybody could help me find out how it works?

https://calcdevice.com/bolt-tightening-of-bar-mounted-clamp-id254.html

 

[3DDave]

A screw thread is just a wedge that is wrapped cylindrically. Past that there are many place that explain that calculation.

https://www.google.com/search?client=firefox-b-1-d&q=bolt+tension+due+to+torque