Print Email Facebook Twitter Pressure adaptive honeycomb: A new adaptive structure for aerospace applications Title Pressure adaptive honeycomb: A new adaptive structure for aerospace applications Author Vos, R. Barrett, R. Faculty Aerospace Engineering Department System Engineering & Aircraft Design Date 2010-03-31 Abstract A new type of adaptive structure is presented that relies on pressurized honeycomb cells that extent a significant length with respect to the plane of the hexagons. By varying the pressure inside each of the cells, the stiffness can be altered. A variable stiffness in combination with an externally applied force field results in a fully embedded pressure adaptive actuator that can yield strains well beyond the state-of-the-art in adaptive materials. The stiffness change as a function of the pressure is modeled by assigning an equivalent material stiffness to the honeycomb walls that accounts for both the inherent material stiffness as the pressure-induced stiffness. A finite element analysis of a beam structure that relies on this model is shown to correlate well to experimental results of a three-point bend test. To demonstrate the concept of embedded pressure adaptive honeycomb, an wind tunnel test article with adaptive flap has been constructed and tested in a low speed wind tunnel. It has been proven that by varying the cell pressure the flap changed its geometry and subsequently altered the lift coefficient. Subject pressureadaptivehoneycombmorphing aircraftpneumaticinflatable To reference this document use: http://resolver.tudelft.nl/uuid:16083bb3-d10b-4462-9112-2f85d2df66b1 Publisher SPIE ISSN 0277-786X Source Proceedings of SPIE, 2010, vol. 7647 Part of collection Institutional Repository Document type conference paper Rights (c)2010 Vos, R., Barrett, R. Files PDF PressureVos.pdf 17.49 MB Close viewer /islandora/object/uuid:16083bb3-d10b-4462-9112-2f85d2df66b1/datastream/OBJ/view