Low cost, SPF aluminum cryogenic tank structure for ALS

Details Low cost, SPF aluminum cryogenic tank structure for ALS Low cost, SPF aluminum cryogenic tank structure for ALS

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992stin...9318030a&link_type=abstract

Final Report, Apr. 1989 - Jan. 1992 Rockwell International Corp., Los Angeles, CA. North American Aircraft Operations.

Physics

Advanced Launch System (Sts), Aluminum, Cryogenic Fluid Storage, Fuel Tanks, Fusion Welding, Low Cost, Space Shuttle Boosters, Spot Welds, Storage Tanks, Titan Launch Vehicles, Heat Treatment, Life Cycle Costs, Machining, Panels, Structural Members

Scientific paper

Past production work has shown that cryogenic tank structure for the Shuttle Booster Rockets and the Titan system have very high life cycle costs for the fuel tank structure. The tanks are machined stiffener-skin combination that are subsequently formed into the required contour after machining. The material scrap rate for these configurations are usually high, and the loss of a tank panel due to forming or heat treatment problems is very costly. The idea of reducing the amount of scrap material and scrapped structural members has prompted the introduction of built-up structure for cryogenic tanks to be explored on the ALS program. A build-up structure approach that has shown improvements in life cycle cost over the conventional built-up approach is the use of superplastically formed (SPF) stiffened panels (reducing the overall part count and weight for the tank) resistance spot welded (RSW) to outer tank skin material. The stiffeners provide for general stability of the tank, while the skin material provides hoop direction continuity for the loads.

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