D110;
While I have outlined the basics, to really get down into working figures is somewhat over my head. You would of course need the actual area the pressure works against, in my example I used case OD which would be larger than its interior area. This as stated would then be multiplied by the pressure & would give the maximum potential thrust. Subtracted from this would be the amount absorbed by the case through it's grip & strength. Another factor which I fully believe plays at least some part is the time factor. This can be appreciated when comparing crusher pressures to piezoelectric pressures. A crusher gun will "Almost Never" read as high a pressure as will the PE gun. This is accounted to the fact the PE crystal reacts virtually instantaneous while the crusher takes an "Extremely Short" but definite time to be fully compressed. In reality then the pressure peaks & begins to fall before the crusher is "Fully Crushed", thus the reading is lower than the PE gauge. In the case of the bolting we would be more concerned with elongation than crushing & steel rather than lead or copper, but the same principals would apply.
As to the lug itself you would need to know the shear area of the lug, the shear strength of the metal & the force to be applied. I was a machinist & a pretty good shop mathamatician but not a stress analyst. There are several here who reach up into that area & hopefully some of them will correspond & give you assistance. Meanwhile I sincerely hope you decide to stick around & become a regular part of the board here.
