Paul No your right. I most stop working 15 hour a day. My head suffers from lack of oxygen. Divided by 10 the results gives my a crush depth equal to 30,6 metres. My gut feelings tells my otherwise. I shall look more into it this afternoon. better check my last calculation I did on work yesterday as well he he Anyway, this is very exiting and a good way to learn..... On 1/29/07, Paul Kreemer <paulkreemer@gmail.com> wrote:
Øystein, I'm probably breathing too high a partial pressure of nitrogen, but shouldn't 30kPA be roughly a depth of 3m? thanks- Paul Pc (external pressure) = 30.6kPA = 30.6kPA / 100kPA/ATM = 0.3 ATM Øystein wrote: 1ATM=100 000kPa =10m Pc=30,6kPa Pc = 300m depth On 1/29/07, Øystein Skarholm < skarholm@gmail.com> wrote: > On 1/29/07, Øystein Skarholm < skarholm@gmail.com> wrote: > > Guys > > > > According to: Timoshenko, S, Theory of elastic Stability, a very rough > > calc gives me a crush depth for your cylinder will be: > > > > L=1524mm, Rm=250,825mm, T=6,35mm, > > k=4,167*10^-3, E=2,1*10^11Pa, m=R/T > > > > 1ATM=100 000Pa =10m > > > > > > Pc=0,87*E*k/m^(3/2) > > > > Pc=(0,87*2,1*10^11Pa*4,167*10^-3)/39,5^(3/2) > > Pc=30,6kPa > > Pc = 300m depth > > > > This is without regards for out of roundness. > > > >
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