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Schematic of 8-Harness Satin Weave Fabric Laminates; a) Planform and b) Section 

Schematic of 8-Harness Satin Weave Fabric Laminates; a) Planform and b) Section 

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Future aircraft technology enhancements (FATE) develop revolutionary technologies that will become the foundation for the next generation of war fighters. The structures thrust of the Air Vehicles Directorate further supports the Air Force need toward a composite affordability initiative (CAI). Affordability and survivability are keys to air and sp...

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... Figure 14, it can be seen that the ballistic limit for satin weave laminates is much higher that the corresponding plain weave laminates. This can be attributed to two reasons. One, satin weave laminates are slightly thicker than plain weave laminates. Two, the fabric architecture. In the plain weave fabric, the fiber tow in the warp direction crosses over every other fiber tow in the fill direction, as shown in the schematic diagram in Figure 15. The angle made over the crossing, which is called crimp angle, is thus steep and is repeated for each tow in both fill and warp direction. Hence, there is considerable reduction in the in-plane properties of the laminate made using plain weave architecture. In comparison, in eight- harness satin weave fabric, the fiber tow in the warp direction runs over seven fiber tows in the fill direction before crossing under the eighth tow in the fill direction, as shown schematically in Figure 16. This pattern in repeated over the entire width of the fabric. This will result in much straighter architecture without any apparent indication of the weave. The resulting laminate will be very close to unidirectional laminate, with much higher in-plane properties as compared to plain weave fabrics. Under impact loading, the tensile failure initiates through in-plane failure of the bottommost ply. The fabric with ...

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