Patent ID: 11952090
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 9:
10. A propeller blade, comprising:
a first surface; and
a second surface opposite the first surface;
wherein the propeller blade comprises a composite material comprising a matrix of a first material and inclusions of a second material embedded within the matrix of the first material, wherein (i) the first material has a negative Poisson's ratio and the second material has a positive Poisson's ratio, or (ii) the first material has a positive Poisson's ratio and the second material has a negative Poisson's ratio; and
wherein the first surface is coupled to the second surface by a leading edge and a trailing edge positioned substantially opposite the leading edge, each of the leading edge and the trailing edge positioned as a connecting surface between the first surface and the second surface.