Composite material with improved damping characteristics and method of making same
AssigneeThe Boeing Company
InventorsKipplan Hunter, Salvatore L. Liguore
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Abstract
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 (Tg) 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.
Claims27
A composite laminate structure having improved damping characteristics, comprising
- a 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.
A composite laminate structure comprising
- a 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.
A method of fabricating a laminate structure having improved damping characteristics, comprising the steps of
- forming 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;
- and
- curing the resins.
Dependencies are inferred from the claim text.