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  • MATERIALS, NONMETALLIC  (1)
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    Titanium reinforced boron-polyimide composite (1969)
    In:  CASI
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    Publication Date: 2019-07-13
    Description: Processing techniques for boron polyimide prepreg were developed whereby composites could be molded under vacuum bag pressure only. A post-cure cycle was developed which resulted in no loss in room temperature mechanical properties of the composite at any time during up to 16 hours at 650 F. A design utilizing laminated titanium foil was developed to achieve a smooth transition of load from the titanium attachment points into the boron-reinforced body of the structure. The box beam test article was subjected to combined bending and torsional loads while exposed to 650 F. Loads were applied incrementally until failure occurred at 83% design limit load.
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-CR-123549 , NR-71H-511
    Format: application/pdf
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