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US 8,137,491 B2Granted
Composite material insert and method for the production thereof, and method for creating a sandwich structure comprising said insert
AssigneeAstrium GmbH
InventorsGeorges Cahuzac, Jack Gauthier, Eric Chocheyras
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Abstract
A reinforcement insert includes superposed laps of fiber which are coupled to each other by a coupling fiber which passes through the laps in order to form fiber sections wherein at least certain sections thereof are rectilinear. The fiber sections and laps are immersed in a cured resin. The total density of the fibers that make up the insert ranges from 50% to 60% of the volume of the insert and the fiber sections take up 3%-10% of the volume of the insert. A method for creating a sandwich structure includes at least one such insert.
Claims7
A process for manufacture of a reinforcing insert comprising:
- forming superposed fiber layers,
- joining together an assembly of said superposed layers by stitching without tying off or with tying off and pressing, by means of a joining fiber crossing through said layers so as to form fiber sections, at least some of said sections being rectilinear,
- impregnating the assembly thus obtained with a resin,
- polymerizing said resin to form a composite material part,
- removing said composite material part from a mold,
- wherein:
- the total fiber density making up the reinforcing insert is comprised of between 50% and 60% of a volume of the reinforcing insert, and fiber sections occupy between 3% and 10% of the volume of the reinforcing insert, and
- the impregnation operation is conducted so as not to compress said assembly thus obtained so that said sections remain rectilinear.
5 more elements
Dependencies are inferred from the claim text.