| CPC B64C 1/00 (2013.01) [B32B 3/06 (2013.01); B32B 3/12 (2013.01); B32B 5/02 (2013.01); B32B 27/12 (2013.01); B32B 27/38 (2013.01); B32B 37/146 (2013.01); B32B 37/185 (2013.01); B64F 5/00 (2013.01); B32B 2250/40 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2305/024 (2013.01); B32B 2307/7375 (2023.05); B32B 2605/18 (2013.01); B32B 2607/00 (2013.01); B64C 2001/0072 (2013.01)] | 20 Claims |
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1. A core structure for a composite panel for an aircraft, the core structure comprising:
a first skin,
a second skin, and
an assembly of core cells, wherein each core cell of the assembly extends between the first skin and the second skin, wherein each of the core cells includes:
at least one cell wall, extending parallel to a cell axis that is perpendicular to the first skin and second skin,
a cell void surrounded by the at least one cell wall, and
a drainage hole in the at least one cell wall, wherein the drainage hole is adjacent to the first skin,
wherein the drainage holes in the cell walls form a direct drainage path along an interior surface of the first skin,
wherein the direct drainage path extends through the assembly of core cells to an edge of the assembly between the first skin and the second skin,
wherein the assembly of the core cells includes a first sheet of first partial core cells stacked with and reversibly joined with a second sheet of second partial core cells,
wherein each of the first and second partial core cells includes at least one partial cell wall extending parallel to the cell axis, and each of the first and second partial core cells includes a void around which extends the at least one cell partial wall;
wherein for each of the core cells, the at least one cell wall includes the at least one partial cell wall of the first partial core cell corresponding to the core cell and the at least one partial cell wall of the second partial core cell corresponding to the core cell;
wherein each of the core cells is a stack of a corresponding one of the first partial core cells and a corresponding one of the second partial cores;
wherein for each of the core cells, the cell void extends continuously through the core cell from the first skin to the second skin and the cell void is a combination of the void for the corresponding first partial core cell and the void for the corresponding second partial core cell;
wherein a plurality of the first partial core cells each includes a male connector and a plurality of the second partial core cells each includes a female connector, and
the plurality of the first partial core cells and the plurality of the second partial core cells are stacked to form a plurality of the core cells each including a male-female connection between corresponding ones of the first partial core cells and ones of the second partial core cells.
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