초록 ▼

Improved pin-reinforced sandwich structure ties the face sheets (typically on opposite sides of a foam core) together with a plurality of Z-pins that extend into each face sheet (through the core). The pins are arranged in a an interlaced configuration off-normal to provide crack resistance around f

Improved pin-reinforced sandwich structure ties the face sheets (typically on opposite sides of a foam core) together with a plurality of Z-pins that extend into each face sheet (through the core). The pins are arranged in a an interlaced configuration off-normal to provide crack resistance around fasteners for connecting the composite structure to other structural elements in aerospace applications.

대표청구항 ▼

[ I claim:] [1.] A reinforced sandwich structure comprising:(a) a core having opposed first and second surfaces defining a reference plane and a normal plane;(b) a first face sheet adjacent the first surface;(c) a second face sheet adjacent the second surface;(d) rigid reinforcement inserted into an

[ I claim:] [1.] A reinforced sandwich structure comprising:(a) a core having opposed first and second surfaces defining a reference plane and a normal plane;(b) a first face sheet adjacent the first surface;(c) a second face sheet adjacent the second surface;(d) rigid reinforcement inserted into and extending between the first and second face sheets and extending through the core to form a reinforced sandwich structure, wherein the reinforcement forms an interlaced, ordered configuration with at least a portion of the reinforcement off-normal to the reference plane to provide crack growth resistance in the face sheets;(e) a bore through the core and face sheets in the region having the interlaced reinforcement; and(f) a fastener in the bore.