Deployable auxetic shape memory alloy cellular antenna demonstrator: design, manufacturing and modal testing

Jacobs, Sydney; Coconnier, C.; DiMaio, Dario; Scarpa, Fabrizio; Toso, Mario; Martínez, Julio Andrés Iglesias

doi:10.1088/0964-1726/21/7/075013

Cited by 77 publications

(52 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Auxetic materials, i.e. materials, which expand laterally when a uniaxial load is applied, have received a significant amount of interest in the past few decades . Auxetic character is known to be a scale independent characteristic , being the product of particular geometries undergoing a specific deformation mechanism.…”

Section: Introductionmentioning

confidence: 99%

A realistic generic model for anti‐tetrachiral systems

Gatt

Attard

Farrugia

et al. 2013

Physica Status Solidi (b)

100

View full text Add to dashboard Cite

Chiral systems are a class of structures, which may exhibit the anomalous property of a negative Poisson's ratio. Proposed by Wojciechowski and implemented later by Lakes, these structures have aroused interest due to their remarkable mechanical properties and numerous potential applications. In view of this, this paper investigates the on-axis mechanical properties of the general forms of the flexing anti-tetrachiral system through analytical and finite element models. The results suggest that these are highly dependent on the geometry (the ratio of ligament lengths, thicknesses, and radius of nodes) and material properties of the constituent materials. We also show that the rigidity of an anti-tetrachiral system can be changed without altering the Poisson's ratio.The anti-tetrachiral system, with the unit cell shown in red.

show abstract

Section: Introductionmentioning

confidence: 99%

A realistic generic model for anti‐tetrachiral systems

Gatt

Attard

Farrugia

et al. 2013

Physica Status Solidi (b)

100

View full text Add to dashboard Cite

show abstract

“…Other works about the development of honeycombs and cellular structures with different types of SMA materials and geometry can be found in [38][39][40][41]. A shape memory alloy cellular structure that exploits the auxetic nature of the chiral configuration has been also developed to create a deployable demonstrator [42] and space antenna [43]. Rossiter et al [44] have also produced a deployable chiral honeycomb, this time using SMP (CRG Veriflex laminate) to achieve greater deployment strains and lower density and metastable configurations.…”

Section: Introductionmentioning

confidence: 99%

A Kirigami shape memory polymer honeycomb concept for deployment

Neville

Chen

Guo

et al. 2017

Smart Mater. Struct.

View full text Add to dashboard Cite

We present a shape memory polymer (SMP) honeycomb with tuneable and shape morphing mechanical characteristics. Kirigami (Origami with cutting allowed) techniques have been used to design and manufacture the honeycomb. The cellular structure described in this work has styrene SMP hinges that create the shape change and the deployment actuation. To create a large volumetric deployment, the Kirigami open honeycomb configuration has been designed by setting an initial three-dimensional re-entrant auxetic (negative Poisson's ratio) configuration, while the final honeycomb shape assume a convex (positive Poisson's ratio) layout. A model was developed to predict the shape change of the structure, and compared to experimental results from a demonstrator honeycomb deployment test.

show abstract

“…The penalty that shall be paid for the related efficiency reduction (1 to 5) is well compensated by the decrease in the number of pieces (a good index for reliability and maintenance), weight savings, and compactness. This advantage can be also exploited for other on-board components like landing gears, deployable antennas and others [22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

SMA-Based System for Environmental Sensors Released from an Unmanned Aerial Vehicle

et al. 2017

View full text Add to dashboard Cite

Abstract:In the work at hand, a shape memory alloy (SMA)-based system is presented. The system, conceived for releasing environmental sensors from ground or small unmanned aerial vehicles, UAV (often named UAS, unmanned aerial system), is made of a door, integrated into the bottom of the fuselage, a device distributor, operated by a couple of antagonistic SMA springs, and a kinematic chain, to synchronize the deployment operation with the system movement. On the basis of the specifications (weight, available space, energy supply, sensors size, etc.), the system design was addressed. After having identified the main system characteristics, a representative mock-up was manufactured, featuring the bottom part of the reference fuselage. Functionality tests were performed to prove the system capability to release the sensors; a detailed characterization was finally carried out, mainly finalized at correlating the kinematic chain displacement with the SMA spring temperature and the supplied electrical power. A comparison between theoretical predictions and experimental outcomes showed good agreement.

show abstract

Deployable auxetic shape memory alloy cellular antenna demonstrator: design, manufacturing and modal testing

Cited by 77 publications

References 32 publications

A realistic generic model for anti‐tetrachiral systems

A realistic generic model for anti‐tetrachiral systems

A Kirigami shape memory polymer honeycomb concept for deployment

SMA-Based System for Environmental Sensors Released from an Unmanned Aerial Vehicle

Contact Info

Product

Resources

About