Innovation

Pressure Adaptive Honeycomb

University of Kansas
posted on 08/03/2010

A novel adaptive aerostructure based on conventional, certified aerospace materials. This structure relies on a grid of conventional,hexagonal honeycomb cells that extend over a significant length perpendicular to the plane of the cells. Inside each of the cells resides a pouch which can be inflated. By varying the cell differential pressure, the overall stiffness of the pressurized honeycomb can be varied. By doing so, a fully embedded pneumatic actuator is created.

Suggested Uses

If the honeycomb system is placed within aircraft structures, it can be used as a substitute for conventional low-bandwidth flight control actuators.

Advantages

Reduction of part count, complexity, power consumption, and cost of conventional high-lift devices

Innovation Details
 

Detailed Description

Pressure-adaptive honeycomb has significant benefits with respect to conventional (electromechanical) actuators. There are no sliding or hinging parts which means there is no wear and tear through operation. Manufacturing, assembly, and integration into conventional wing structures are all straightforward and can rely on conventional techniques and certified materials. In terms of compliance it has been estimated based on prior experiments on conventional honeycombs that strains in excess of 50% can be achieved in either principal direction. It can be seen that pressure-adaptive honeycomb displays relatively large strains compared to other adaptive materials. Its volumetric energy density rivals that of the electromechanical servo. Additionally the mass specific energy density of this pressureadaptive honeycomb is close to that of shape memory alloys, which have the highest mass specific energy density of all adaptive material classes.

File Number: 10KU005L 


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This innovation currently is not available for online licensing. Please contact Ann Spitz at University of Kansas for more information.

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February 11, 2009

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