| CPC E04C 2/365 (2013.01) [B31D 3/0207 (2013.01); B31D 3/0292 (2013.01); B31D 5/02 (2013.01); E04B 2/50 (2013.01); B32B 3/12 (2013.01); E04B 2002/0223 (2013.01); E04C 2/328 (2013.01)] | 14 Claims |
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1. A structure comprising a wall,
the wall defining a radius of curvature and comprising a radially oriented strip that includes a first edge at an inner surface of the wall and a second edge at an outer surface of the wall,
the strip defining an array of cells, each cell having a cell length extending from the first edge to the second edge in the radial direction of the wall curvature, and
each cell defining a first unit cell profile comprising a first geometric shape at the first edge and a second, different unit cell profile comprising a second, different geometric shape at the second edge, the first unit cell profile transitioning to the second unit cell profile across the cell length;
wherein the length of the second edge along the second unit cell profile is substantially equal to the length of the first edge along the first unit cell profile,
wherein at least one of the first and second geometric shapes comprises a sine wave, wherein the radially oriented strip exhibits a radial curvature due to the change in the different unit cell profiles across a width of the radially oriented strip, and
wherein the radially oriented strip spirals about an axis of the radius of curvature of the wall such that the strip forms a plurality of layers of the wall.
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