Composite airfoil with increased shear capability

Details Composite airfoil with increased shear capability Composite airfoil with increased shear capability

B - Operations, Transporting

64

C

B64C 11/26 (2006.01) B29C 70/08 (2006.01) B29C 70/54 (2006.01) B32B 27/04 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2042218

13DV-9675 ABSTRACT OF THE DISCLOSURE An airfoil blade and method of manufacturing same having greater tolerance to impact damage. The blade comprises a plurality of layers of composite laminates sandwiching at least one layer of a less than rigid bonding agent. The resilient bonding agent allows for relative movement between adjacent layers allowing loading of the laminate to its full strain potential and thereby reducing the shock loading normally transferred to the adjacent laminates by a hard- setting epoxy bonding material. In one form, the resilient material is selectively positioned between layers of laminates at different predetermined locations of the blade. The blade may be stitched to provide additional layer-to-layer support using synthetic cording such as an aeromatic polyamide.

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