Composite reinforcement of metallic airfoils

Details Composite reinforcement of metallic airfoils Composite reinforcement of metallic airfoils

F - Mech Eng,Light,Heat,Weapons

04

D

170/81

F04D 29/38 (2006.01) F01D 5/14 (2006.01) F01D 5/16 (2006.01)

Patent

CA 1075161

COMPOSITE REINFORCEMENT OF METALLIC AIRFOILS Abstract A method of fabricating a turbomachinery blade is provided whereby high stress levels associated with stripe mode resonance can be avoided. Once the nodal pattern for an objectionable stripe mode resonance condition of a metallic blade is determined by conventional means, a portion of the blade parent metal near the tip is replaced with a composite patch, the composite patch comprising elongated filaments embedded in a matrix material, The chordwise extent of the patch includes the nodal points at the objectionable stripe mode resonance condition and the filament orientation is chordwise to enhance chordwise stiffness.

292803

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