Guys, I haven't been able to get to this thread with some other biz going. But, for the axial concern, my recollection is axial stress is half of the hoop stress in a cylinder.
The formulae for a thinwalled tube is much simpler than for a thickwalled tube like a chamber. I'm not a stress engineer, but speculate that this problem (thickwalled tube) is fairly complex calculation and that most likely is done with FEM (finite element modeling by computer) today. Next week I may have a chance to run into some stress engineers and ask some basic questions. Hopefully, we have a more qualified structural engineer here that can help in the meantime.
Last edited by Chuck H; 04/06/07 05:38 PM.