Deployable Structures: Structural Design and Static/Dynamic Analysis

Zhang, Xiao; Nie, Rui; Yan, Cheng; He, Baiyan

doi:10.1007/s10659-021-09860-6

Cited by 54 publications

(11 citation statements)

References 212 publications

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“…[6] Conventional shape-reconfiguration strategies are usually based on the motion of mechanisms integrating rigid and flexible components. [7][8][9][10] These mechanisms commonly required additional locking devices with additional weight and complexity to maintain the shape in the expected working state. [7][8][9] Another emerging strategy for shapereconfiguration is the utilization of smart materials such as shape memory alloys, [11] shape memory polymers, [12] liquid crystal elastomers [13,14] and optical/electric/magnetic/thermal sensitive materials.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] These mechanisms commonly required additional locking devices with additional weight and complexity to maintain the shape in the expected working state. [7][8][9] Another emerging strategy for shapereconfiguration is the utilization of smart materials such as shape memory alloys, [11] shape memory polymers, [12] liquid crystal elastomers [13,14] and optical/electric/magnetic/thermal sensitive materials. [15][16][17][18] Although smart materials can realize required shape-reconfiguration effectively, a continuous energy supply is necessary to maintain the desired shape.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, 3D shape‐reconfigurable metamaterials can also be easily designed by our framework, providing an effective approach to overcome the difficulty in high‐dimensional design. [ 7 ] Within 0.35 s, the 3D metamaterial can achieve 35.40‐times volume variation. Through appropriate parameter design, the area/volume variation ratio can be easily customized even to infinity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrafast Shape‐Reconfigurable Chiral Mechanical Metamaterial based on Prestressed Bistable Shells

Liu

Pan

Feng

et al. 2023

Adv Funct Materials

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Fast shape‐reconfiguration with large morphing amplitude is crucial for intelligent materials/structures that require tunable functions and adaptivity to different environments. However, the morphing strategies are rare in combining ultrafast speed, large amplitude, and high energy‐efficiency simultaneously. Herein, a class of 2D and 3D chiral mechanical metamaterials are proposed to tackle this challenge based on prestressed bistable metallic shells. The metamaterial is architected by cylindrical cores and slender bistable shells with an anti‐chiral arrangement. The bistable shell has a flat extended shape and a rolled‐up shape that can wrap on the connected cylindrical cores compatibly, and thus endow the metamaterials with a tunable morphing amplitude that can even extend to infinity. By experiments, simulations and theoretical modelling, it is demonstrated that the bistable shell can transform from the extended state to the rolled‐up state with a transitional speed of 7.56 m s−1, which provides the 2D and 3D metamaterials with 25.38‐ and 101.14‐times body area/volume variation per second, respectively. Moreover, a smart trapper for capturing moving objects and a phononic structure with tunable band gaps are realized based on the metamaterials. This work provides a straightforward platform to design metamaterials and their derived systems with ultrafast and large‐amplitude shape‐reconfigurability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrafast Shape‐Reconfigurable Chiral Mechanical Metamaterial based on Prestressed Bistable Shells

Liu

Pan

Feng

et al. 2023

Adv Funct Materials

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“…The parabolic cylindrical antenna has high gain and flexible beam scanning because it has a beam reflection effect and maintains the flexible beam characteristics of the phased array feed-in direction. [1][2][3] The outstanding characteristics of parabolic cylindrical antennas have broad application prospects in space-to-Earth observation, celestial observation and other fields, which make them a major topic in antenna research. [4][5][6] The optimum design of pole system of a large space cable-strut tensioned parabolic cylindrical antenna is an important part of the design process.…”

Section: Introductionmentioning

confidence: 99%

Optimisation design of a large space cable-pole tensioned parabolic cylindrical antenna mechanism

Zhu,

Shi,

Fan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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The cable-strut structure optimisation of a large space cable-strut tensioned parabolic cylindrical antenna is studied. Firstly, the deployment mechanism is designed, and the degree of freedom and kinematics analysis of the mechanism are conducted. Secondly, a complete tension cable configuration with 58 tension cables in 24 categories is established on the basis of the structural characteristics and constraints. A configuration optimisation design method based on the influence coefficient of comprehensive stiffness is proposed. A less tensioned cable optimisation configuration with better static and dynamic stiffness performance is established on the basis of the fully tensioned cable configuration and using the proposed method, and the stiffness characteristics of the configuration are verified through the analysis of an example. Lastly, a mathematical surrogate model between the designed angle and length parameters of the reflector rod system and the fundamental frequency of the antenna is established using the response surface method, and the optimal solution of the reflector rod system is obtained by a genetic algorithm. The effectiveness of the optimisation is verified by finite element modelling and simulation analysis. This study provides a basis and reference for the structural dynamic modelling, characteristic analysis and optimal design of a large space cable-strut tensioned parabolic cylindrical antenna.

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“…SMMs are advantageous and often used to create 4D printed structures due to their large deformation potential and fast actuation as compared to SCMs. , Due to their lightweight and flexible nature, shape memory polymers (SMPs) have great potential for applications of soft robotic systems and wearable electronics, which require soft, flexible, body contouring materials. , Furthermore, due to the large deformation and actuation potential, these materials provide exciting opportunities for applications of deployable structures such as temporary shelters/architectures or deployable antennas, solar sails, and spacecraft. − The working mechanisms behind the actuation of these smart materials is attributed to the shape memory effect (SME) which allows these materials to hold a temporary position through their hard crystalline phase, while their soft amorphous regions allow for a reversible recovery back to a temporary position, most commonly with the application of heat . The temperature with which this recovery occurs is often at or above the polymer glass transition temperature T g , which serves as the state at which the polymer behavior switches from a stiff state to a soft state.…”

Section: Introductionmentioning

confidence: 99%

4D Printing of MXene Composites for Deployable Actuating Structures

McLellan

Sun

et al. 2022

ACS Appl. Polym. Mater.

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The development of innovative materials for three-dimensional (3D) printing is creating potential opportunities for advancements in additive manufacturing (AM) technologies, including in four-dimensional (4D) printing. Through the creation of next-generation shape memory polymer composites (SMPCs), printed parts can now be bestowed with increased functionalities including the ability to transform their shape, acting as smart actuators that respond to the stimuli around them. These materials are of great interest for development of soft robotic systems, which can be quickly and affordably manufactured. In this work, a SMPC consisting of a TPU:PLA polymer blend system with embedded MXene (Ti3C2) flakes is fabricated and evaluated. The mechanical, thermal, and morphological properties prove to be greatly improved with the addition of MXene at 0.5 wt %. At higher loadings of 2 wt % MXene, the composite shows superb shape memory effect results in fast recovery to ∼98% its original position in under 14 s. Rheological behavior and thermal properties were evaluated, followed by 3D printing using material extrusion. Results show great potential of MXene-loaded composites for fast shape memory actuation in 3D/4D printed structures. The potential of such composites is demonstrated through several printed designs, which show large deformation suitable for deployable structures.

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Deployable Structures: Structural Design and Static/Dynamic Analysis

Cited by 54 publications

References 212 publications

Ultrafast Shape‐Reconfigurable Chiral Mechanical Metamaterial based on Prestressed Bistable Shells

Ultrafast Shape‐Reconfigurable Chiral Mechanical Metamaterial based on Prestressed Bistable Shells

Optimisation design of a large space cable-pole tensioned parabolic cylindrical antenna mechanism

4D Printing of MXene Composites for Deployable Actuating Structures

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