Hybrid composite structure having damped metallic fibers
AssigneeThe Boeing Company
InventorSalvatore L. Liguore
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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.
Claims20
A damped composite structure, comprising:
- a matrix material;
- a plurality of metallic shape memory alloy wire fibers held in the material matrix for damping the structure;
- and,
- a plurality of reinforcement fibers in said material matrix.
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 shape memory alloy wires and having an inherent material loss factor greater than approximately 0.10.
Dependencies are inferred from the claim text.