Originally Posted by
longbow
joeb33050:
I will do a calculation based on the ultimate tensile stress of the lead to see what RPM's are required for bullet blow up. I won't have time for a day or two.
I will have to go through it a few times to see the differences between bullet diameters. I'll see if I can put a graph or table or something together for you. I am not a math wizard by any means, I am a mechanical technologist with a machine design background I work with stress and strain calculations regularly but not for situations like this so I had to do a bit of digging for the info.
You are welcome to use whatever I come up with in your book but before you do I would like to make sure that it is checked and accurate. No point in spreading misinformation because I made a silly mistake.
Also, as mentioned before, the RPM's I determine are required to produce enough stress in the bullet to cause it to fail and blow up will be due to stresses produced purely by rotation without consideration of imbalances due to voids, surface imperfections, eccentricities, slump, etc.
Anyway, I will do my best.
Longbow