Originally Posted by
hackish
I'm designing something to break straps - a home DIY type deal.
I have a hydraulic ram with a maximum of 30000 lbs of force.
This will be acting on a pair of 1" 4140 HR (annealed) rods under tension. They are threaded to M24x1.5. (I plan to use a CV axle nut that is 20mm thick).
I would like to figure out the yield strength of this arrangement. I took a stab at it below:
I think it's 60,200 psi but I don't know if that's annealed, hardened or if it matters
The minor diameter of the thread is 21.92mm. = 0.58" area * 60200 psi = 34916 lbs per side <-- no idea if this is correct
At what point would the threads just rip out?