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DTIC ADA305026: Study of Advanced Composite Structural Design Conce... |
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by Defense Technical Information Center |
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A structural design study was conducted to assess the |
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relative merits of structural concepts using advanced |
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composite materials for an advanced supersonic aircraft |
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cruising at Mach 2.7. The configuration and structural |
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arrangement developed during Task I and II of the study, |
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previously reported in NASA CR-132576, was used as the |
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baseline configuration. Allowable stresses and strains |
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were established for boron and advanced graphite fibers |
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based on projected fiber properties available in the next |
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decade. Structural concepts were designed and analyzed |
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using graphite polyimide and boron polyimide, applied to |
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stiffened panels and conventional sandwich panels. The |
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conventional sandwich panels were selected as the |
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structural concept to be used on the wing structure. The |
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upper and lower surface panels of the Task I arrow wing |
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were redesigned using high-strength graphite polyimide |
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sandwich panels over the titanium spars and ribs. The |
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ATLAS computer system was used as the basis for stress |
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analysis and resizing the surface panels using the loads |
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from the Task II study, without adjustment for change in |
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aeroelastic deformation. The flutter analysis indicated a |
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decrease in the flutter speed compared to the baseline |
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titanium wing design. The flutter speed was increased to |
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that of the titanium wing, with a weight penalty less |
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than that of the metallic airplane. |
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Date Published: 2018-03-29 08:12:08 |
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Identifier: DTIC_ADA305026 |
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Item Size: 373221716 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; ; BOEING COMMERCIAL AIR... |
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