. Development of a spherical acrylic plastic pressure hull for hydrospace application. Hulls (Naval architecture); Submersibles. Figure 50. Preparing the two hemispheres for bonding together into a sphere. Because of all the problems encountered during the bonding operations, the resulting joints in the 66-inch prototype capsule leave much to be desired and constitute a fruitful area for future improvement. However, one very valuable finding about joints could be expected from hydrostatic testing of the prototype large-scale capsule: Successful, structural integrity of the hull and joints unde
. Development of a spherical acrylic plastic pressure hull for hydrospace application. Hulls (Naval architecture); Submersibles. Figure 50. Preparing the two hemispheres for bonding together into a sphere. Because of all the problems encountered during the bonding operations, the resulting joints in the 66-inch prototype capsule leave much to be desired and constitute a fruitful area for future improvement. However, one very valuable finding about joints could be expected from hydrostatic testing of the prototype large-scale capsule: Successful, structural integrity of the hull and joints under both operational and proof pressures would serve as proof that the presence of discontinuities (dispersed cavities and separation spaces) in the joints is not a bar to safe operational performance of a spherical acrylic plastic capsule under external hydrostatic loading. On the other hand, if the cavities and separation spaces served as fatigue crack initiators leading to early cyclic fatigue failure, future joints would have to be cast utilizing more refined casting techniques and under tighter quality control to prevent the occurrence of any cavities. 79. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Stachiw, Jerry D. , 1931-; Naval Civil Engineering Laboratory (Port Hueneme, Calif. ). Port Hueneme, Calif. : U. S. Naval Civil Engineering Laboratory
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