CPC F01D 5/282 (2013.01) [F01D 5/147 (2013.01); F01D 5/30 (2013.01); F05C 2251/08 (2013.01); F05D 2240/303 (2013.01); F05D 2240/304 (2013.01); F05D 2240/307 (2013.01); F05D 2300/505 (2013.01)] | 19 Claims |
1. An airfoil rotatable about an axis to move air in an axial direction, the airfoil comprising:
a root portion having a root;
a tip portion having a tip, the tip located opposite the root along a radial direction;
a frangible portion disposed outward of the root portion along the radial direction; and
a support device comprising a shape memory alloy, wherein the support device connects the root portion to the frangible portion and is movable between a baseline position and a deflected position, wherein the support device is configured to undergo a phase transformation to a martensite phase responsive to an external mechanical load, and return to an austenite phase responsive to relaxing of the external mechanical load.
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