Morphing thickness in airfoils using pneumatic flexible tubes and Kirigami honeycomb

The work describes a concept to morph the thickness of airfoils using a combination of pneumatic flexible tubes within a Kirigami honeycomb configuration that represents the wingbox structure. The configuration of the honeycomb/inflatable tube structure is composed by a pair of flexible tubes sandwiched between two custom honeycomb layouts. At zero input pressure, the tube assumes a sinusoidal shape, which is reduced to a straight configuration and increase of the airfoil thickness when pressure is applied. An analytical model is developed for design purposes to consider the actuation authority and thickness change provided by the system proposed. The results are benchmarked against experimental tests carried out on a reduced-scale demonstrator.

[1]  Jinsong Leng,et al.  Curved Kirigami SILICOMB cellular structures with zero Poisson’s ratio for large deformations and morphing , 2014 .

[2]  Farhan Gandhi,et al.  Zero Poisson’s Ratio Cellular Honeycombs for Flex Skins Undergoing One-Dimensional Morphing , 2010 .

[3]  Carlo Menon,et al.  Bioinspired hydraulic joint for highly redundant robotic platforms , 2009, 2009 ASME/IFToMM International Conference on Reconfigurable Mechanisms and Robots.

[4]  Markus Reischl,et al.  A hydraulically driven multifunctional prosthetic hand , 2005, Robotica.

[5]  Fabrizio Scarpa,et al.  A Cellular Kirigami Morphing Wingbox Concept , 2011 .

[6]  Armando R. Rodriguez.  Morphing Aircraft Technology Survey , 2007 .

[7]  Hiroshi Sugiyama,et al.  Shape-variable sandwich structure with SMA honeycomb core and CFRP skins , 2009, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[8]  Carlo Menon,et al.  A spatial bending fluidic actuator: fabrication and quasi-static characteristics , 2012 .

[9]  M. Ruzzene,et al.  Composite chiral structures for morphing airfoils: Numerical analyses and development of a manufacturing process , 2010 .

[10]  C Menon,et al.  Active articulation for future space applications inspired by the hydraulic system of spiders , 2006, Bioinspiration & biomimetics.

[11]  Vladimir Brailovski,et al.  SMA actuators for morphing wings , 2010 .

[12]  M Pagitz,et al.  Pressure-actuated cellular structures , 2012, Bioinspiration & biomimetics.

[13]  R. Barrett,et al.  Mechanics of pressure-adaptive honeycomb and its application to wing morphing , 2011 .

[14]  Massimo Ruzzene,et al.  Smart shape memory alloy chiral honeycomb , 2008 .

[15]  Massimo Ruzzene,et al.  The hexachiral prismatic wingbox concept , 2008 .

[16]  R. D. Gregory,et al.  On plate theories and Saint-Venant's principle , 1985 .

[17]  Taketoshi Nojima,et al.  Development of Newly Designed Ultra-Light Core Structures , 2006 .

[18]  Fabrizio Scarpa,et al.  SILICOMB PEEK Kirigami cellular structures: mechanical response and energy dissipation through zero and negative stiffness , 2013 .

[19]  Ephrahim Garcia,et al.  Morphing unmanned aerial vehicles , 2011 .

[20]  Afzal Suleman,et al.  Design of a Morphing Airfoil Using Aerodynamic Shape Optimization , 2006 .

[21]  Hui Hu,et al.  Airfoil Thickness Effects on the Thrust Generation of Plunging Airfoils , 2012 .

[22]  William A. Crossley,et al.  Enabling Continuous Optimization for Sizing Morphing Aircraft Concepts , 2005 .

[23]  Jinsong Leng,et al.  Active inflatable auxetic honeycomb structural concept for morphing wingtips , 2014, Smart Materials and Structures.

[24]  Joseph C. S. Lai,et al.  Reynolds number, thickness and camber effects on flapping airfoil propulsion , 2011 .

[25]  William A. Crossley,et al.  AIRCRAFT SIZING WITH MORPHING AS AN INDEPENDENT VARIABLE: MOTIVATION, STRATEGIES AND INVESTIGATIONS , 2002 .

[26]  Carlo Menon,et al.  Beam-Steering Antenna using Bending Fluidic Actuators , 2013, IEEE Transactions on Antennas and Propagation.

[27]  David A. Peters,et al.  Representation of Morphing Airfoil Thickness in Dynamic Stall Simulations , 2012 .

[28]  Daniel J. Inman,et al.  A Review of Morphing Aircraft , 2011 .

[29]  Fabrizio Scarpa,et al.  A smart hydraulic joint for future implementation in robotic structures , 2010, Robotica.

[30]  Ernie Havens,et al.  Morphing Wing Structures for Loitering Air Vehicles , 2004 .

[31]  Jayanth N. Kudva,et al.  Morphing aircraft concepts, classifications, and challenges , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[32]  M Pagitz,et al.  Shape-changing shell-like structures , 2013, Bioinspiration & biomimetics.