Hybrid Composite Structure having Damped Metallic Fibers and Method for Making the Same
AssigneeThe Boeing Company
InventorSalvatore L. Liguore
Life of this patent
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Abstract
A damped composite structure is formed from a matrix material and a plurality of shape memory alloy wire fibers held in the material matrix for damping the structure. The wire fibers may be embedded in a viscoelastic interlayer to increase damping of the structure. The wire fibers may be interspersed with reinforcement such as carbon fibers, in tows or in a mesh of fibers. The wire fibers have an inherent material loss factor greater than approximately 0.10, and may be formed from superelastic metal alloys, such as Ni—Ti, Cu—Zn—Al, Cu—Al—Ni, OR Cu—Al—Be.
Claims24
A damped composite structure, comprising:
- a matrix material;
- and,
- a plurality of shape memory alloy wire fibers held in the material matrix for damping the structure.
A damped composite aircraft structural component, comprising:
- laminated plies of synthetic resin;
- a first set of fibers in the resin for reinforcing the plies;
- and,
- a second set of fibers in the resin for damping noise and vibration, the fibers in the second set being metallic and having an inherent material loss factor greater than approximately 0.10.
A method of fabricating a damped composite structure for aircraft, comprising the steps of:
- (A) introducing shape memory alloy wire fibers into plies of fiber reinforced synthetic resin;
- and
- (B) laminating the plies.
Dependencies are inferred from the claim text.