Snap-through and stiffness adaptation of a multi-stable Kirigami composite module

Lele, Aditya; Deshpande, Vishrut; Myers, Oliver; Li, Suyi

doi:10.1016/j.compscitech.2019.107750

Cited by 32 publications

(12 citation statements)

References 59 publications

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“…x y ) shown in Figure 4B. Figure 4C shows that connecting the two bistable cylindrical plates in series forms a multistable structure, [100] which can generate 4 different stable configurations by independently snapping the bistable plates.…”

Section: Curved 2d Platesmentioning

confidence: 99%

“…For doubly curved plates, both bending and stretching deformations will become strongly coupled to snap to the other stable configuration with different principal curvatures, [ 53 ] that is, (

κ_{x}^{(1)}, κ_{y}^{(1)}

) → (

κ_{x}^{(2)}, κ_{y}^{(2)}

) shown in Figure 4B. Figure 4C shows that connecting the two bistable cylindrical plates in series forms a multistable structure, [ 100 ] which can generate 4 different stable configurations by independently snapping the bistable plates.…”

Section: Structural Design Principles For Constructing Bistable Elementsmentioning

confidence: 99%

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Bistable and Multistable Actuators for Soft Robots: Structures, Materials, and Functionalities

et al. 2022

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Snap‐through bistability is often observed in nature (e.g., fast snapping to closure of Venus flytrap) and the life (e.g., bottle caps and hair clippers). Recently, harnessing bistability and multistability in different structures and soft materials has attracted growing interest for high‐performance soft actuators and soft robots. They have demonstrated broad and unique applications in high‐speed locomotion on land and under water, adaptive sensing and fast grasping, shape reconfiguration, electronics‐free controls with a single input, and logic computation. Here, an overview of integrating bistable and multistable structures with soft actuating materials for diverse soft actuators and soft/flexible robots is given. The mechanics‐guided structural design principles for five categories of basic bistable elements from 1D to 3D (i.e., constrained beams, curved plates, dome shells, compliant mechanisms of linkages with flexible hinges and deformable origami, and balloon structures) are first presented, alongside brief discussions of typical soft actuating materials (i.e., fluidic elastomers and stimuli‐responsive materials such as electro‐, photo‐, thermo‐, magnetic‐, and hydro‐responsive polymers). Following that, integrating these soft materials with each category of bistable elements for soft bistable and multistable actuators and their diverse robotic applications are discussed. To conclude, perspectives on the challenges and opportunities in this emerging field are considered.

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Section: Curved 2d Platesmentioning

confidence: 99%

“…For doubly curved plates, both bending and stretching deformations will become strongly coupled to snap to the other stable configuration with different principal curvatures, [ 53 ] that is, (

κ_{x}^{(1)}, κ_{y}^{(1)}

) → (

κ_{x}^{(2)}, κ_{y}^{(2)}

Section: Structural Design Principles For Constructing Bistable Elementsmentioning

confidence: 99%

Bistable and Multistable Actuators for Soft Robots: Structures, Materials, and Functionalities

et al. 2022

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“…Meanwhile, kirigami-cut sheets can exhibit nonlinear properties such as super-stretchability (Blees et al, 2015;Tang and Yin, 2017), negative Poisson's ratio (Hou et al, 2014;Del Broccolo et al, 2017), and stretch-induced buckling (Isobe and Okumura, 2016;Rafsanjani and Bertoldi, 2017). Given that cutting is scalable, kirigami principles have found applications in many engineered systems with vastly different scales, like nano/mesoscale devices (Xu et al, 2018), composite laminates (Lele et al, 2019), wearable sensors (Xu et al, 2019), and robotics (Firouzeh et al, 2020;Yang et al, 2021). In particular, kirigami skin has been combined with other soft actuators to improve the performance of crawling robots by significantly increasing the friction between the robotic body and its surrounding medium (Rafsanjani et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Pneumatic Soft Actuators With Kirigami Skins

Khosravi

Iannucci

2021

Front. Robot. AI

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Soft pneumatic actuators have become indispensable for many robotic applications due to their reliability, safety, and design flexibility. However, the currently available actuator designs can be challenging to fabricate, requiring labor-intensive and time-consuming processes like reinforcing fiber wrapping and elastomer curing. To address this issue, we propose to use simple-to-fabricate kirigami skins—plastic sleeves with carefully arranged slit cuts—to construct pneumatic actuators with pre-programmable motion capabilities. Such kirigami skin, wrapped outside a cylindrical balloon, can transform the volumetric expansion from pneumatic pressure into anisotropic stretching and shearing, creating a combination of axial extension and twisting in the actuator. Moreover, the kirigami skin exhibits out-of-plane buckling near the slit cut, which enables high stretchability. To capture such complex deformations, we formulate and experimentally validates a new kinematics model to uncover the linkage between the kirigami cutting pattern design and the actuator’s motion characteristics. This model uses a virtual fold and rigid-facet assumption to simplify the motion analysis without sacrificing accuracy. Moreover, we tested the pressure-stroke performance and elastoplastic behaviors of the kirigami-skinned actuator to establish an operation protocol for repeatable performance. Analytical and experimental parametric analysis shows that one can effectively pre-program the actuator’s motion performance, with considerable freedom, simply by adjusting the angle and length of the slit cuts. The results of this study can establish the design and analysis framework for a new family of kirigami-skinned pneumatic actuators for many robotic applications.

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“…The design of reconfigurable structures usually relies on structural instabilities, stimuli-responsive constituent materials (like swellable gels and shape memory polymers) [22][23][24] , or their heterogeneous combinations 25 . For example, origami and kirigami, ancient art of folding of 2D thin sheets along predefined creases to create 3D objects, have been widely used as platforms for deployable structures due to their multiple deployed stable states under mechanical deformation 7,15,[26][27][28][29][30][31][32][33][34][35][36][37] . Structural instabilities have also been exploited in recently developed mechanics-guided assembly approaches to complex 3D functional architectures and electronics in a diversity of configurations and a broad range of material compositions [38][39][40][41][42] .…”

Section: Introductionmentioning

confidence: 99%

Reconfiguration of multistable 3D ferromagnetic mesostructures guided by energy landscape surveys

Avis

Chen

et al. 2021

Extreme Mechanics Letters

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Reconfigurable three-dimensional (3D) structures that can reversibly change their geometries and thereby their functionalities are promising for a wide range of applications. Despite intensive studies, the lack of fundamental understanding of the highly nonlinear multistable states existing in these structures has significantly hindered the development of reconfigurable systems that can realize rapid, well-controlled shape change. Herein we present a systematic, integrated experimental and computational study to control and tailor the multistable states of 3D structures and their reconfiguration paths. Our energy landscape analysis using a discrete shell model and minimum energy pathway methods leads to design maps for a controlled number of stable states by varying geometry and material parameters, and energy-efficient reconfiguration paths among the multistable states. Concurrently, our experiments show that 3D structures assembled from ferromagnetic composite thin films of diverse geometries can be rapidly reconfigured among their multistable states, with the number of stable states and reconfigurable paths in excellent agreement with computational predictions. In addition, we demonstrate a wide breadth of applications including reconfigurable 3D light emitting systems, remotely-controlled release of particles/drugs from a reconfigurable structure, and 3D structure arrays that can form desired patterns following the written path of a magnetic "pen". Our results represent a critical step towards the rational design and development of well-controlled, rapidly and remotely reconfigurable structures for many applications.

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Snap-through and stiffness adaptation of a multi-stable Kirigami composite module

Cited by 32 publications

References 59 publications

Bistable and Multistable Actuators for Soft Robots: Structures, Materials, and Functionalities

Bistable and Multistable Actuators for Soft Robots: Structures, Materials, and Functionalities

Pneumatic Soft Actuators With Kirigami Skins

Reconfiguration of multistable 3D ferromagnetic mesostructures guided by energy landscape surveys

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