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    Use of Lead Glass Fiber Yarns as Tracers in Radiography of Filament-Wound Products

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    The use of reinforced plastics in pressure vessels, rocket motors, and lightweight structures is impeded by the lack of design codes and by inadequate inspection procedures. A technique for the inclusion of lead glass fiber yarns in products intended for radiographic inspection is described for determining the concentration, orientation, and condition of groups of reinforcements in filament-wound products with or without fabric inserts. The inclusion of a few lead silicate fiber tracer yarns in the primary and secondary reinforcements and the radio-graphic inspection of the molded product may permit a reduction of the thickness and cost of the product and an increase in the allowable strength-weight ratio. This would improve the competitive position of reinforced plastics for use in precision parts and in lightweight structures.

    Author Information:

    Perry, H. A.
    U. S. Naval Ordnance Laboratory, White Oak, Silver Spring, Md.

    Committee/Subcommittee: D20.94

    DOI: 10.1520/STP44446S