Somatosensory Electro‐Thermal Actuator through the Laser‐Induced Graphene Technology DOI
Hao Wang, Xuyang Li, Xiaoyue Wang

et al.

Small, Journal Year: 2023, Volume and Issue: 20(21)

Published: Dec. 12, 2023

The biological system realizes the unity of action and perception through muscle tissue nervous system. Correspondingly, artificial soft actuators realize sensing actuating functions in a single functional material, which will have tremendous potential for developing intelligent bionic robotics. This paper reports design laser-induced graphene (LIG) electrothermal actuator with self-sensing capability. LIG, material formed by one-step direct-write lasing procedure under ambient air, is used as conversion materials piezoresistive materials. By transferring LIG to flexible silicone substrate, ability LIG-based unit enriched, along an effectively improved sensitivity. Through integration different types well-designed units, transformations from multidimensional precursors 2D 3D structures are realized. According effect units during deformation process, visual synchronous state feedback proposed. multimodal crawling robotics switchable electromagnetic shielding cloak serve demonstrations actuator, showing advantage remote control robot without relying on assistance devices.

Language: Английский

Marangoni-driven deterministic formation of softer, hollow microstructures for sensitivity-enhanced tactile system DOI Creative Commons
Wennan Xiong, Fan Zhang, Shiyuan Qu

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 3, 2024

Microengineering the dielectric layers with three-dimensional microstructures has proven effective in enhancing sensitivity of flexible pressure sensors. However, widely employed geometrical designs solid exhibit limited over a wide range pressures due to their inherent but undesired structural compressibility. Here, Marangoni-driven deterministic formation approach is proposed for fabricating hollow microstructures, allowing greater deformation while retarding stiffening during compression. Fluid convective deposition enables solute particles reassemble template controlling interior cavity void ratio exceeding 90%. The micro-pyramid sensor exhibits 10-fold improvement across wider ranges utilizing micro-pyramids, and an ultra-low detect limit 0.21 Pa. With advantages facilitation, scalability, large-area compatibility, such can be expanded other types superior performance considerable potential robotic tactile epidermal devices.

Language: Английский

Citations

16
Anisotropic Morphing in Bistable Kirigami through Symmetry Breaking and Geometric Frustration DOI Creative Commons
Chuan Qiao, Filippo Agnelli, Deepak Kumar Pokkalla

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 28, 2024

Abstract Shape morphing in bistable kirigami enables remarkable functionalities appealing to a diverse range of applications across the spectrum length scale. At core their shape shifting lies architecture repeating unit, where highly deformable slits and quasi‐rigid rotating units often exhibit multiple symmetries that confer isotropic deployment obeying uniform scaling transformation. In this work, symmetry breaking is investigated access geometric frustration anisotropic morphing, enabling arbitrarily scaled planar spatial domains. With an analysis on properties complemented by systematic investigation integrating semi‐analytical derivations, numerical simulations, experiments elastic sheets, work unveils fundamental relations between slit symmetry, frustration, deployment. Furthermore, asymmetric are leveraged flat‐to‐3D demonstrations showcase pivotal role shear deformation achieving target shapes functions so far unattainable with uniformly stretchable kirigami. The insights provided unveil controlling soft metamaterials, enriching achievable for spanning deployable space structures, wearable technologies, machines.

Language: Английский

Citations

11
Mountain-valley crease reconfiguration of 4-crease origami vertices and tessellations DOI
Weiqi Liu,

Song Cao,

Yan Chen

et al.

International Journal of Mechanical Sciences, Journal Year: 2024, Volume and Issue: 273, P. 109224 - 109224

Published: March 25, 2024

Language: Английский

Citations

10
Snap-through buckling in heavy hard magnetic elastica DOI
Yingchao Zhang, Weicheng Huang, Mingchao Liu

et al.

Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences, Journal Year: 2025, Volume and Issue: 481(2311)

Published: April 1, 2025

Snap-through buckling is widely used in bistable structures for rapid actuation and energy-efficient designs. While gravity often neglected traditional slender structures, its impact on heavy hard magnetic elastica (h-HMEs) significant due to their high-density ultra-soft matrix, resulting a large gravity-elastic constant. This study investigates the snapping behaviour of h-HMEs under combined magnetic–gravitational fields. A theoretical framework developed describe stability, critical fields influence optimal position single magnetization interface (M-interface). Results reveal that introduces directional dependence transitions, facilitating process direction while hindering it against gravity. These effects become more pronounced with increasing Although M-interface remains nearly unaffected, significantly alters magnitude Scaling laws design guidelines are proposed, providing valuable insights applications snapping-based metamaterials where gravity's effect cannot be ignored.

Language: Английский

Citations

1
Omnidirectional Configuration of Stretchable Strain Sensor Enabled by the Strain Engineering with Chiral Auxetic Metamaterial DOI

Taiqi Hu,

Taisong Pan, Dengji Guo

et al.

ACS Nano, Journal Year: 2023, Volume and Issue: 17(21), P. 22035 - 22045

Published: Oct. 16, 2023

An electromechanical interface plays a pivotal role in determining the performance of stretchable strain sensor. The intrinsic mechanical property elastomer substrate prevents efficient modulation interface, which limits further evolution In this study, chiral auxetic metamaterial (CAM) is incorporated into sensor to override deformation behavior pristine device and regulate performance. tunable isotropic Poisson's ratio (from 0.37 -0.25) achieved by combination CAM endows with significantly enhanced sensitivity (53-fold improvement) excellent omnidirectional sensing ability. regulation mechanism associated crack propagation on deformed also revealed finite element simulations experiments. demonstration on-body monitoring human physiological signals smart training assistant for trampoline gymnastics CAM-incorporated illustrates benefits omnidirectionally

Language: Английский

Citations

19
Deployment behavior and mechanical property analysis of Kresling origami structure DOI
Zhang Ji, Changguo Wang

Composite Structures, Journal Year: 2024, Volume and Issue: 341, P. 118234 - 118234

Published: May 25, 2024

Language: Английский

Citations

8
Programmable responsive metamaterials for mechanical computing and robotics DOI
Qiguang He, Samuele Ferracin, Jordan R. Raney

et al.

Nature Computational Science, Journal Year: 2024, Volume and Issue: 4(8), P. 567 - 573

Published: Aug. 27, 2024

Language: Английский

Citations

8
Experimental study of solid-liquid origami composite structures with improved impact resistance DOI Creative Commons
Shuheng Wang, Zhanyu Wang,

Bei Wang

et al.

Theoretical and Applied Mechanics Letters, Journal Year: 2024, Volume and Issue: 14(2), P. 100508 - 100508

Published: March 1, 2024

In this paper, a liquid-solid origami composite design is proposed for the improvement of impact resistance. Employing strategy, Kresling structures with different fillings were designed and fabricated, namely air, water, shear thickening fluid (STF). Quasi-static compression drop-weight experiments carried out to compare reveal static dynamic mechanical behavior these structures. The results from demonstrated that solid-liquid exhibited superior yield strength reduced peak force when compared their empty counterparts. Notably, filled STF significantly heightened force. For example, at an velocity 3 m/s, single-layer STF-filled increased by 772.7% decreased 68.6%. This holds potential advance application in critical areas such as aerospace, intelligent protection other important fields. improvements resistance underscore practical viability approach enhancing structural performance range applications.

Language: Английский

Citations

7
Volume Optimisation of Multi-stable Origami Bellows for Deployable Space Habitats DOI Creative Commons
Mengzhu Yang,

Joe Defillion,

Fabrizio Scarpa

et al.

Acta Mechanica Solida Sinica, Journal Year: 2023, Volume and Issue: 36(4), P. 514 - 530

Published: June 23, 2023

Abstract Origami bellows are formed by folding flat sheets into closed cylindrical structures along predefined creases. As the unfold, volume of origami structure will change significantly, offering potential for use as inflatable deployable structures. This paper presents a geometric study multi-stable Miura-ori and Kresling bellows, focusing on their application space habitats. Such habitats would be compactly stowed during launch, before expanding once in orbit. The internal ratio between different deployed states is investigated across design space. case study, SpaceX Falcon 9 payload fairing chosen transportation effective calculated to enable comparison with conventional habitat designs. Optimal designs deployment patterned tubular obtained using particle swarm optimisation (PSO) techniques. Configurations significant expansion can found both patterns, patterns achieving higher due additional radial deployment. A multi-objective PSO (MOPSO) adopted identify trade-offs volumetric ratios pattern.

Language: Английский

Citations

15
In‐Plane Crashworthiness of Gradient Curved‐Walled Honeycombs: Experimental, Numerical Simulation, and Theoretical Analysis DOI
Kuijian Yang,

Zetao Ke,

Zekai Li

et al.

Advanced Engineering Materials, Journal Year: 2024, Volume and Issue: 26(20)

Published: Aug. 28, 2024

Honeycombs are widely used in engineering protection, while the gap between peak and mean stresses remains to be narrowed, interaction effects among walls weak. To break these limits, gradient curved‐walled honeycombs have been proposed recently. However, their in‐plane crashworthiness has never studied, which restricts actual applications complex load environment. For this purpose, article adopts experiments, finite‐element simulations, theoretical analysis reveal crash performance of honeycombs. Quasistatic dynamic experiments carried out for 3D‐printed honeycomb specimens made 316L stainless steel, numerical simulations conducted by ABAQUS/Explicit. Compared traditional straight‐ honeycombs, display stabler deformation mode more efficient mechanical response. Their EA SEA respectively 25.5% 6.4% larger than straight‐walled energy absorption force efficiencies nearly 2.4 5.3 times larger, respectively. On basis, plastic hinge model with high accuracy established, derive analytical solutions force–displacement relations. This work extends comprehensive properties application prospects sets an example develop effective simplification desirable on complex‐shaped structures.

Language: Английский

Citations

6