A PHOTOELASTIC INVESTIGATION OF DEEP SUBMERGENCE WINDOWS
2006
Winter, Robert | Becker, Herbert
Photoelastic investigations were conducted to determine stresses in 45 degree seat angle conical frustum plastic windows with diameter/thickness (d/ h) ratios from 0.5 to 2.5 to embrace the range of current design (on Aluminant, Trieste, and Alvin vehicles, d/h = 0.54, 0.67, and 1.43 respectively). The results indicate that a window with d/h less than 1 may be used without significant tensile stresses occurring on the inner face. The effect of seat angle/window angle mismatch was found to have relatively little effect upon stress levels near the cone axis, although local concentrations at the periphery of the inner face were strongly affected. An important aspect of the study was the tentative identification of the physical nature of the window behavior as a conical sector of a pressurized hollow sphere interacting with a lens shaped cap.
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