Method for producing sections in sandwich structures of fiber composites and sections produced accordingly
AssigneeDeutsches Zentrum für Luft- und Raumfahrt e.V.
InventorsArno Pabsch, Wilm Felix Unckenbold, Axel Herrmann
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Abstract
A method for producing sections in sandwich structures of fiber composites is provided, as well as the structures. The method involves shaping sectional cores around a cut-out, applying bands circumferentially along the perimeter of the cut-out, and covering the sectional cores and to circumferential bands, with layers. The sandwich structure is then impregnated with resin.
Claims16
A method for producing composite fiber sandwich structures with an upper outer layer and a lower outer layer, at least one sectional core having a sheathing wall surrounding a core, and with a cut-out in which the at least one sectional core(s) is selectively shaped and/or cut to size and the upper and lower outer layers are adjusted in the area of the cut-out by being cut to size, the method comprising the steps of:
- cutting to size the upper and lower outer layers, such that cut-to-size components remain which initially partly cover the region of the cut-out,
- laying or draping selected strips around the perimeter of the cut-out contour,
- wrapping the cut-to-size components of the upper and lower outer layers around the sectional cores and the strips around the perimeter, and
- soaking the sandwich structure with resin, and
- curing the sandwich structure soaked with resin.
A composite fiber sandwich structure with an upper and lower outer layer, at least one sectional core, and with a cut-out, in which the at least one sectional core is selectively shaped and/or cut to size, and the upper and lower outer layer are adjusted in the area of the cut-out by being cut to size, the composite fiber sandwich structure comprising:
- strips provided on the perimeter of the cut-out and in contact with the at least one sectional core;
- and
- selectively shaped portions of the lower outer layer and the upper outer layer projecting into the cut-out and covering the strips surrounding the perimeter of the cut-out.
Dependencies are inferred from the claim text.