Page 127 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition
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FIGURE 5.7
FEA analysis of fiberglass coating.
5.1 Vehicle design 115
(Courtesy Engineered Syntactic Systems.)
FIGURE 5.8
Syntactic foam taken to crush depth.
man-rated syntactics. To man-rate the materials an extensive amount of testing is required to insure the buoyancy will return without incident. Whereas the normal crush depth of the syntactic is 1.1%, man-rated systems are tested to 1.5% of test depth. The latest Alvin specification can readily be attained online. Figure 5.8 shows a typical high-performance material, rated to 20,000 ft (approximately 6000 m), that went well beyond its test depth. As can be seen, the material, designed (with safety factor) for 14.5 Kpsi (10.2 Mkg/m2), eventually crushed at a pressure of 16 Kpsi (11.2 Mkg/m2).
(Photo courtesy Engineered Syntactic Systems.)
