Engineering topics
Publications and source records attributed to Stuck, Donald E..
Treatment makes bars of Inconel(R) 718 alloy homogeneous so acoustic waves pass through material at constant velocity. Makes possible accurate acoustic monitoring of preloads in fasteners made from bars. Eliminates longitudinal inhomogeneous regions by recrystallizing bars.
Two-piece, all-metal, pressure-assisted static flange seal holds in pressurized helium satisfactorily at temperature of negative 80 degree F (negative 62 degree C). Installed between two flanges, then bolted together. New version includes one pressure-assisted metal sealing element held in place by metal plate and flanges. Certified for use in flight on helium joints of Space Shuttle main engine. Likely terrestrial applications include laboratory and industrial gas-distribution systems.
Modification of widely used pressure-assisted gasket ensures tight seal even when one sealed surface somewhat rough or porous. Modified U-cross-section gasket has thin lips increasing sealing area and conform to slightly rough surface. Lips provide wider sealing area and extend highly loaded region at tip. Coating of polytetrafluoroethylene on tip and lip augments conformance.