Deployable structures using bistable reeled composites

2000 ◽  
Author(s):  
Andrew J. Daton-Lovett ◽  
Quentin M. Compton-Bishop ◽  
Richard G. Curry
Keyword(s):  
Deployable Structures

Deployable Structures in Nature: Potential for Biomimicking

2000 ◽  
Vol 214 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J. F. V. Vincent
Keyword(s):  
Biological System ◽  
High Strain ◽  
Elastic Materials ◽  
Deployable Structures ◽  
Space Frame ◽  
Emergency Shelters

Biology contains many examples of deployable structures. They can be grouped as planar, cylindrical, stiff and compliant, and space frame combining both stiff and compliant elements (ten-segrity structures). Deployment occurs due to high strain elastic materials, or folds and curves that can be actuated by springs, changes in shape (mediated by hydraulic or contractile mechanisms) or changes in stiffness. Evolution filters out inefficiency. Transfer of nature's technology requires understanding of the optimizations in the biological system. The concepts can then be used in aerospace, deployable camouflage, packaging, emergency shelters, capture systems, etc.

A Mobile Bennett Network Constructed with Identical Square Panels

2021 ◽  
pp. 1-23
Author(s):  
Fufu Yang ◽  
Yuan Gao ◽  
Shuailong Lu ◽  
Kunjing Chen
Keyword(s):  
Mobile Networks ◽  
Design Parameter ◽  
Degree Of Freedom ◽  
Deployable Structures ◽  
Geometric Conditions ◽  
Application Potential

Abstract Mobile networks, constructed with simple linkages by tessellation, have great application potential in engineering as they could change their shapes according to the need of working state by one degree of freedom (DOF). However, the existing one-DOF networks are always composed of bar-like links, and cooperated membranes should be designed and fabricated additionally, which makes the design and the realization more complicated. This paper is to construct a one-DOF network of Bennett linkages with identical square panels. Geometric conditions to construct the network are derived by investigating the kinematic compatibility, kinematics is carried out to show the relationships among all Bennett linkages, and the discussion on the design parameter shows the extensibility and the deploying performance, which is validated by two physical prototypes. This work initials the construction of mobile networks with identical polygon-like links, which will simplify the fabrication and realization of deployable structures.

Deployable structures of reciprocal crossed arches

2019 ◽  
pp. 714-721 ◽  
Author(s):  
M. Muñoz-Vidal ◽  
I. López-César ◽  
J. Pérez-Valcárcel ◽  
F. Suárez-Riestra
Keyword(s):  
Deployable Structures

A Tailored Nonlinear Slat-Cove Filler for Airframe Noise Reduction

2018 ◽  
Author(s):  
Gaetano Arena ◽  
Rainer Groh ◽  
Alberto Pirrera ◽  
William Scholten ◽  
Darren Hartl ◽  
...  
Keyword(s):  
High Strain ◽  
Interaction Analysis ◽  
Effective Means ◽  
Leading Edge ◽  
Structural Behavior ◽  
Deployable Structures ◽  
Airframe Noise ◽  
Structure Interaction ◽  
Slat Noise ◽  
Displacement Constraints

Exploiting mechanical instabilities and elastic nonlinearities is an emerging means for designing deployable structures. This methodology is applied here to investigate and tailor a morphing component used to reduce airframe noise, known as a slat-cove filler (SCF). The vortices in the cove between the leading edge slat and the main wing are among the important sources of airframe noise. The concept of an SCF was proposed in previous works as an effective means of mitigating slat noise by directing the airflow along an acoustically favorable path. A desirable SCF configuration is one that minimizes: (i) the energy required for deployment through a snap-through event; (ii) the severity of the snap-through event, as measured by kinetic energy, and (iii) mass. Additionally, the SCF must withstand cyclical fatigue stresses and displacement constraints. Both composite and shape memory alloy (SMA)-based SCFs are considered during approach and landing maneuvers because the deformation incurred in some regions may not demand the high strain recoverable capabilities of SMA materials. Nonlinear structural analyses of the dynamic behavior of a composite SCF are compared with analyses of similarly tailored SMA-based SCF and a reference, uniformly thick superelastic SMA-based SCF. Results show that by exploiting elastic nonlinearities, both the tailored composite and SMA designs decrease the required actuation energy compared to the uniformly thick SMA. Additionally, the choice of composite material facilitates a considerable weight reduction where the deformation requirement permits its use. Finally, the structural behavior of the SCF designs in flow are investigated by means of preliminary fluid-structure interaction analysis.

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