Under Pressure Ver.4.08 16:05:17 12-17-2001 TUBE CONFIGURATION (External Pressure) Inner Diameter : 3.0000 in Outer Diameter : 3.2500 in Wall Thickness : 0.12500 in Tube Length : 6.0000 in Weight in air : 0.72158 lbs Weight in water: -1.1221 lbs Failure Mode: Shell failure at 3.2332 Ksi (Thin wall eq's) Thin Wall Buckling at 4.1651 Ksi by 3 nodes Seat failure N/A Shear failure N/A ALUMINUM, 6061-T6 Properties: Yield Strength : 35 Ksi Elastic Modulus : 10 Mpsi Density : 0.098 lb/cu in Poisson's Ratio : 0.33 Comments : Compressive Young's Modulus = 10.1 Mpsi Compressive Yield Strength = 34 Ksi Minimum Welded Yield Strength = 15 kpsi Tube distortion values: Pressure Depth Max Axial Max Hoop Max Equiv d ID d OD d Length Ksi Ft (sea) Stress, Ksi Stress, Ksi Stress, Ksi Inches Inches Inches 1.0000 2248.8 -6.2500 -12.500 10.825 -0.0032617 -0.0032617 -0.0012750 2.0000 4490.9 -12.500 -25.000 21.651 -0.0065234 -0.0065234 -0.0025500 3.0000 6726.2 -18.750 -37.500 32.476 -0.0097852 -0.0097852 -0.0038250 * 3.2332 7246.4 -20.207 -40.415 35.000 -0.010546 -0.010546 -0.0041223 * 4.0000 8954.8 -25.000 -50.000 43.301 -0.013047 -0.013047 -0.0051000 * 5.0000 11177 -31.250 -62.500 54.127 -0.016309 -0.016309 -0.0063750 * 6.0000 13392 -37.500 -75.000 64.952 -0.019570 -0.019570 -0.0076500 * 7.0000 15601 -43.750 -87.500 75.777 -0.022832 -0.022832 -0.0089250 * 8.0000 17804 -50.000 -100.00 86.603 -0.026094 -0.026094 -0.010200 * 9.0000 20000 -56.250 -112.50 97.428 -0.029355 -0.029355 -0.011475 * 10.000 22190 -62.500 -125.00 108.25 -0.032617 -0.032617 -0.012750 * 11.000 24373 -68.750 -137.50 119.08 -0.035879 -0.035879 -0.014025 * 12.000 26551 -75.000 -150.00 129.90 -0.039141 -0.039141 -0.015300 * 13.000 28722 -81.250 -162.50 140.73 -0.042402 -0.042402 -0.016575 * 14.000 30887 -87.500 -175.00 151.55 -0.045664 -0.045664 -0.017850 * 15.000 33046 -93.750 -187.50 162.38 -0.048926 -0.048926 -0.019125 * 16.000 35199 -100.00 -200.00 173.21 -0.052187 -0.052187 -0.020400 * 17.000 37346 -106.25 -212.50 184.03 -0.055449 -0.055449 -0.021675 * 18.000 39487 -112.50 -225.00 194.86 -0.058711 -0.058711 -0.022950 * 19.000 41622 -118.75 -237.50 205.68 -0.061973 -0.061973 -0.024225 * 20.000 43752 -125.00 -250.00 216.51 -0.065234 -0.065234 -0.025500 * = after housing failure