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    • 4. 发明申请
    • WOVEN PREFORM FOR STRUCTURAL JOINTS
    • 结构接头的WOVEN PREFORM
    • WO2003023104A1
    • 2003-03-20
    • PCT/US2002/028914
    • 2002-09-10
    • LOCKHEED MARTIN CORPORATION
    • SCHMIDT, Ronald, P.KALSER, David, A.
    • D03D25/00
    • B29B11/16B29C70/24D03D25/005Y10S139/01Y10T442/3195
    • A preform for structural joints has a three-dimensional weave architecture with fill fibers woven to provide layer-to-layer interlocking of layers of warp fiber as well as interlocking of fibers within each layer. At least two legs extend from a base, the base and legs each having at least two layers of warp fibers. The legs are connected at a symmetrical, distributed-column intersection, with an odd number of columns of warp fibers being located being the legs. The outer ends of the base and legs preferably have tapers formed from terminating layers of warp fibers in a stepped pattern. Tracer fibers that include a colored strand and an x-ray opaque strand are woven into the preform at selected locations as a warp fiber. The tracer fibers allow for identification of a selected location or a selected portion of the preform through visual inspection or by x-ray image.
    • 用于结构接头的预成型件具有三维织造结构,其具有编织的填充纤维,以提供经线层的层间互锁以及每层中的纤维的互锁。 至少两条腿从基部延伸,基部和腿各自具有至少两层经线。 腿以对称的分布式列交叉连接,奇数列经线纤维位于腿部。 基部和腿部的外端优选地具有由阶梯状图案的经向纤维的端接层形成的锥部。 包括着色线和X射线不透明线的示踪纤维在选定位置作为经纤维编织到预制件中。 示踪纤维允许通过目视检查或通过X射线图像识别预成型件的选定位置或选定部分。