초록 ▼

A composite laminate structure formed from at least one high-strength, high-stiffness fiber-resin composite structural lamina laminated to at least one fiber-resin composite damping lamina, wherein the resin matrix of the structural lamina resides below its glassification temperature (T g ) and whe

A composite laminate structure formed from at least one high-strength, high-stiffness fiber-resin composite structural lamina laminated to at least one fiber-resin composite damping lamina, wherein the resin matrix of the structural lamina resides below its glassification temperature (T g ) and wherein the resin matrix of the damping lamina resides above its glassification temperature during normal use temperatures, thereby providing a high-strength laminate with improved damping properties.

대표청구항 ▼

1. A composite laminate structure having improved damping characteristics, comprisinga damping lamina having from 40 to 70 wt % fibers impregnated within a first thermosetting resin matrix;a structural lamina having from 40 to 70 wt % fibers impregnated within a second thermosetting resin matrix; an

1. A composite laminate structure having improved damping characteristics, comprisinga damping lamina having from 40 to 70 wt % fibers impregnated within a first thermosetting resin matrix;a structural lamina having from 40 to 70 wt % fibers impregnated within a second thermosetting resin matrix; and,wherein the first resin is present in the viscoelastic state and the second resin is present in the glassy state. 2. The structure of claim 1, wherein each of the damping and structural lamina comprise from 2 to 20 plies. 3. The structure of claim 1, wherein the fibers of the laminae are selected from the group consisting of carbon fiber, aramid fiber, glass fiber, and combinations thereof. 4. The structure of claim 3, wherein the fibers of the structural lamina are continuous carbon fibers. 5. The structure of claim 1, wherein the thermosetting resins of the damping and the structural laminae are epoxy resins with thermal stability of at least 200° F. 6. The structure of claim 5, wherein the epoxy resin of the damping lamina has a plastisizer content of between 12 wt % and 35 wt % by total weight of the first resin and wherein the epoxy resin of the structural lamina has a plastisizer content of less than 10 wt % by total weight of second resin. 7. The structure of claim 6, wherein the plastisizer content of the second resin is less than 5 wt % by total weight of the second resin. 8. The structure of claim 6, wherein the plastisizer content of the first resin is between 12.5 wt % and 17 wt % by total weight at the first resin. 9. The structure of claim 1, further comprising a plurality of damping laminae and a plurality of structural laminae, wherein the structural laminae comprise the outer laminae of the laminate. 10. A composite laminate structure comprisinga damping lamina having from 40 to 70 wt % fibers impregnated within a first thermosetting resin matrix;a structural lamina having from 40 to 70 wt % fibers impregnated with a second thermosetting resin matrix; and,wherein the first resin resides above its glassification temperature and wherein the second resin resides below its glassification temperature. 11. The structure of claim 10, wherein each of the damping and structural second lamina comprise from 2 to 20 plies. 12. The structure of claim 11, wherein the fibers of the laminates are selected from the group consisting of carbon fiber, aramid fiber, glass fiber, and combinations thereof. 13. The structure of claim 12, wherein the fibers of the structural lamina are continuous carbon fibers. 14. The structure of claim 10, wherein the thermosetting resin of the damping and the structural lamina is an epoxy resin with thermal stability of at least 200° F. 15. The structure of claim 10, wherein the second resin has a plastisizer of less than 10 wt % by total weight of the second resin. 16. The structure of claim 10, wherein the first resin has a plastisizer content of between 12 wt % and 35 wt % by total weight of the first resin. 17. The structure of claim 10, further comprising a plurality of damping laminae and a plurality of structural laminae, wherein the structural laminae comprise the outer laminae of the laminate. 18. A method of fabricating a laminate structure having improved damping characteristics, comprising the steps offorming a damping lamina by impregnating a fiber layer with a first thermosetting resin matrix having a plastisizer content of between 12 wt % and 35 wt % by total weight of the first resin;forming a structural lamina by impregnating a fiber layer with a second thermosetting resin matrix having a plastisizer content of less than 10 wt % by total weight of second resin;layering the damping and structural lamina; andcuring the resins. 19. The method of claim 18, wherein the damping lamina has a fiber content of about 40 wt % to about 70 wt % fiber per total weight of the lamina. 20. The method of claim 18, wherein the structural lamina has a fiber content of about 40 wt % to about 70 wt % fiber per total weight of the lamina. 21. The method of claim 18, wherein the step of forming the damping lamina comprises the steps offorming from 2 to 20 plies of fiber impregnated with the first thermosetting resin and layering the plies to form the damping lamina. 22. The method of claim 18, wherein the step of forming the structural lamina comprises the steps offorming from 2 to 20 plies of fiber impregnated with the second thermosetting resin and layering the plies to form the structural lamina. 23. The method of claim 18, wherein the plastisizer content of the second resin is less than 5 wt % by total weight of the second resin. 24. The method of claim 18, wherein the plastisizer content of the first resin is between 12.5 wt % and 17 wt %. 25. The method of claim 18, further comprising the steps offorming a plurality of damping laminae and a plurality of structural laminae; and,layering the laminae such that the structural laminae comprise the outer laminae of the laminate. 26. The method of claim 25, further comprising the step of laminating the plurality of damping laminae and structural laminae to an additional dissimilar laminate, thereby forming a hybrid laminate. 27. The method of claim 26, wherein the fibers of the dissimilar laminate are of dissimilar composition as those fibers of the damping and structural laminae.