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US 4,029,838 AGranted
Hybrid composite laminate structures
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsChristos C. Chamis, Raymond F. Lark
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Abstract
The invention relates to laminate structures and specifically to essentially anisotropic fiber composite laminates wherein metal foils are selectively disposed within the laminate to produce increased resistance to high velocity impact, fracture, surface erosion, and other stresses within the laminate.
Claims7
A hybrid structural laminate comprising alternating plies of a matrix material and planar metallic foil;
- said matrix material being embedded with fiber elements having substantially unidirectional strength characteristics, said fiber elements being oriented within said matrix material with the longitudinal axes thereof extending in substantially the same direction;
- said foil plies alternating within the laminate structure with said matrix material plies, said matrix material being metal for outermost plies and non-metallic for innermost plies;
- and
- said fiber embedded metal matrix material being aluminum with boron fibers therein.
1 more element
A hybrid structural laminate comprising alternating plies of a matrix material and planar metallic foil;
- said matrix material being embedded with fiber elements having substantially unidirectional strength characteristics, said fiber elements being oriented within said matrix material with the longitudinal axes thereof extending in substantially the same direction;
- said foil plies alternating within the laminate structure with said matrix material plies, said matrix material being metal for outermost plies and nonmetallic for innermost piles;
- said fiber embedded matrix material being aluminum with boron fibers therein and wherein the non-metal fiber-embedded matrix material comprises graphite fibers embedded in an epoxy resin matrix material.
Dependencies are inferred from the claim text.