Transformation of polyhedrons

Chen, Yan; Yang, Fufu; Zhang, You

doi:10.1016/j.ijsolstr.2018.01.012

Cited by 22 publications

(6 citation statements)

References 14 publications

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“…[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%

“…[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%

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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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%

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

Liu

Pan

Feng

et al. 2023

Adv Funct Materials

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“…Yang and Chen (2018) proposed a convertible DM by appropriately configuring the movable joint, which can realize the 1-DOF transformation between a tetrahedron and a truncated tetrahedron. In addition, Chen et al (2018) proposed a 1-DOF shape transformation between two paired polyhedrons by introducing 6R spatial links. Xiu et al (2020) presented a Sarruss-like overconstrained spatial eight-bar linkage and an associated Fulleroid-like DM.…”

Section: Introductionmentioning

confidence: 99%

Design of an origami-based cylindrical deployable mechanism

et al. 2022

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Abstract. In this paper, an innovative cylindrical deployable mechanism (DM) based on rigid origami is presented, which is used to design a parabolic cylindrical deployable antenna. The mechanism can be deployed from the cuboid folded configuration to the cylindrical unfolded configuration with only one actuator. First, an innovative deployable string is proposed based on different types of four-vertices origami unit cells and kirigami techniques. By considering the units as 6R single-loop mechanisms, the kinematics of the origami unit cells are analyzed. Through the connection of identical deployable strings, the cylindrical DM is constructed, and its mobility is analyzed utilizing the screw theory. Then the proposed DM is used to design a parabolic cylindrical deployable antenna. A number of pillars are installed on the panels of the DM, and their lengths are determined to fit the required parabolic cylindrical surface. To verify the feasibility of the design, a scaled prototype of the deployable antenna is constructed.

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“…The folding motion of origami patterns, such as the tetrahedron pattern, 1 the waterbomb pattern, 2 the Miura derivative patterns, 3,4 and the superimposed pattern, 5 have been investigated with different analytical methods. 6 Many state-of-the-art engineering applications have been inspired by origami, a notable example of which is the foldcore, the cellular core formed by folding thin sheets based on the principle of origami. It has been regarded as a promising alternative to the conventional honeycomb core for the sandwich structure.…”

Section: Introductionmentioning

confidence: 99%

Quasi-static mechanical properties of novel generalized Resch-pattern composite foldcores

Deng

Ji²,

Zhou

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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A new geometric design method for foldcores based on the generalized Resch patterns that allow face-to-face bonding interfaces between the core and the skins is proposed. Based on the geometric design method, a systematic numerical investigation on the quasi-static mechanical properties of the generalized Resch-based foldcores made of carbon fiber-reinforced plastic (CFRP) woven fabrics subjected to compression and shear loads is performed using the finite element method that is validated by experiments. The relationships between the mechanical properties and various geometric parameters as well as laminate thickness of the generalized Resch-based CFRP foldcores are revealed. Additionally, the mechanical properties of the generalized Resch-based CFRP foldcore are compared to those of the standard Resch-based, Miura-based foldcore, the honeycomb core, and the aluminum counterpart. It is found that the generalized Resch-based CFRP foldcore performs more stably than the honeycomb core under compression and has higher compressive and shear stiffnesses than the standard Resch-based and Miura-based foldcores and absorbs as nearly twice energy under compression as the Miura-based foldcore does. When compared with the aluminum counterpart, the CFRP model has higher weight-specific stiffness and strength but lower energy absorption capacity under shearing. The results presented in this paper can serve as the useful guideline for the design of the generalized Resch-based composite foldcore sandwich structures for various performance goals.

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Transformation of polyhedrons

Cited by 22 publications

References 14 publications

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

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

Design of an origami-based cylindrical deployable mechanism

Quasi-static mechanical properties of novel generalized Resch-pattern composite foldcores

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