Layup of composite fan blades/vanes

Details Layup of composite fan blades/vanes Layup of composite fan blades/vanes

F - Mech Eng,Light,Heat,Weapons

01

D

F01D 5/00 (2006.01) F01D 5/28 (2006.01)

Patent

CA 2070522

13DV-9965 Abstract of the Invention The present invention provides composite blade tip configurations for preventing delamination at the tip of a composite rotor blade. The invention comprises a plurality of first thin successive layers of a first composite material wherein the first thin layers are stacked in a predetermined configuration such that the weakest shear plane is positioned towards the blade surface. The invention further comprises joining material for joining the first thin layers to each other. The invention further comprises a plurality of second thin successive layers of a second composite material having a different modulus of elasticity than that of the first thin layers wherein the second layers are stacked on the first layers such that the edge of the blade tip is even. The inventor further includes joining material also being used for joining the second thin layers to each other and to the first thin layers. The invention further comprises a cloth fiber protective covering completely enclosing the first and second thin layers.

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