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US 5,744,221 AGranted
Flexible high-damping composite structures and fabrication thereof
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsRoger M. Crane, Armando L. Santiago, Wayne C. Jones
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Abstract
Composite structures which are cost-effectively fabricated using conventional resin transfer molding or filament winding technique, featuring utilization of fiber fabric material or individually stranded fiber tow material as the fiber reinforcement material for high strain-to-failure viscoelastic matrix material, and affording desired structural performance and superior performance in terms of flexibility, damping and damage-tolerance.
Claims29
A composite structure, comprising:
- fabric material having a plurality of fibers which are integrally interrelated in the form of said fabric material;
- high strain-to-failure viscoelastic matrix material contiguously disposed in relation to some said fibers;
- and
- conventional matrix material contiguously disposed in relation to other said fibers, said conventional matrix material being selected from the group of resins consisting of epoxy, urea, polyester, vinylester, phenolic, polyimide, bismaleimide, melamine and silicone.
1 more element
A composite structure, comprising:
- a plurality of single-stranded tows;
- high strain-to-failure viscoelastic matrix material contiguously disposed in relation to some said tows;
- and
- conventional matrix material contiguously disposed in relation to other said tows, said conventional matrix material being selected from the group of resins consisting of epoxy, urea, polyester, vinylester, phenolic, polyimide, bismaleimide, melamine and silicone.
1 more element
A method for making a composite structure, comprising:
- (a) preparing fabric material having a plurality of fibers which are integrally interrelated in the form of said fabric material;
- (b) infusing at least some said fabric material with high strain-to-failure viscoelastic matrix material;
- (c) preparing a bath containing high strain-to-failure viscoelastic matrix material;
- and
- (d) wet winding a plurality of single-stranded tows through said bath;
- wherein said steps (a) and (b) are directed to making at least a first portion of said composite structure, and said steps (c) and (d) are directed to making at least a second portion of said composite structure.
3 more elements
A method for making a composite structure, comprising:
- preparing fabric material having a plurality of fibers which are integrally interrelated in the form of said fabric material;
- infusing some said fabric material with high strain-to-failure viscoelastic matrix material;
- and
- infusing other said fabric material with conventional matrix material, said conventional matrix material being selected from the group of resins consisting of epoxy, urea, polyester, vinylester, phenolic, polyimide, bismaleimide, melamine and silicone.
1 more element
A method for making a composite structure, comprising:
- preparing a bath containing high strain-to-failure viscoelastic matrix material;
- wet winding a plurality of single-stranded tows through said bath containing high strain-to-failure viscoelastic matrix material;
- preparing a bath containing conventional matrix material, said conventional matrix material being selected from the group of resins consisting of epoxy, urea, polyester, vinylester, phenolic, polyimide, bismaleimide, melamine and silicone;
- and
- wet winding a plurality of single-stranded tows through said bath containing conventional matrix material.
2 more elements
A composite structure, comprising:
- fabric material having a plurality of fibers which are integrally interrelated in the form of said fabric material;
- high strain-to-failure viscoelastic matrix material contiguously disposed in relation to at least some said fibers;
- a plurality of single-stranded tows;
- and
- conventional matrix material contiguously disposed in relation to at least some said tows, said conventional matrix material being selected from the group of resins consisting of epoxy, urea, polyester, vinylester, phenolic, polyimide, bismaleimide, melamine and silicone.
2 more elements
A method for making a composite structure, comprising:
- (a) preparing fabric material having a plurality of fibers which are integrally interrelated in the form of said fabric material;
- (b) infusing at least some said fabric material with high strain-to-failure viscoelastic matrix material;
- (c) preparing a bath containing conventional matrix material, said conventional matrix material being selected from the group of resins consisting of epoxy, urea, polyester, vinylester, phenolic, polyimide, bismaleimide, melamine and silicone;
- and
- (d) wet winding a plurality of single-stranded tows through said bath;
- wherein said steps (a) and (b) are directed to making at least a first portion of said composite structure, and said steps (c) and (d) are directed to making at least a second portion of said composite structure.
3 more elements
Dependencies are inferred from the claim text.