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 tetrahedral or hat section configuration in 2-dimensional or 3-dimensional

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 tetrahedral or hat section configuration in 2-dimensional or 3-dimensional arrangements to provide enhanced reinforcement, particularly in shear. We are able to improve the pulloff strength additionally by dimpling the core surrounding the pins to produce adhesive fillets along the pins.

대표청구항 ▼

[ We claim:] [1.] A pin-reinforced sandwich structure, comprising:(a) a core having opposed first and second surfaces;(b) a first face sheet adjacent the first surface and containing a resin;(c) a second face sheet adjacent the second surface and containing a resin;(d) a plurality of separate pins i

[ We claim:] [1.] A pin-reinforced sandwich structure, comprising:(a) a core having opposed first and second surfaces;(b) a first face sheet adjacent the first surface and containing a resin;(c) a second face sheet adjacent the second surface and containing a resin;(d) a plurality of separate pins inserted into the first and second face sheets and extending through the core to form a pin-reinforced sandwich structure, and(e) dimples in the core adjacent and surrounding each pin and adjacent each face sheet, each dimple being filled with resin from a face sheet to produce resin fillets for improved pulloff strength of the face sheets from the corewherein the pins form an ordered configuration to enhance pulloff strength, the configuration being tetrahedral or hat section.