@article{qi_li_hong_zhao_qing_yin_2024, title={Defected twisted ring topology for autonomous periodic flip-spin-orbit soft robot}, volume={121}, ISSN={["1091-6490"]}, DOI={10.1073/pnas.231268012}, number={3}, journal={PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, author={Qi, Fangjie and Li, Yanbin and Hong, Yaoye and Zhao, Yao and Qing, Haitao and Yin, Jie}, year={2024}, month={Jan} }
 @article{chi_zhao_hong_li_yin_2023, title={A Perspective on Miniature Soft Robotics: Actuation, Fabrication, Control, and Applications}, ISSN={["2640-4567"]}, DOI={10.1002/aisy.202300063}, abstractNote={Soft robotics enriches the robotic functionalities by engineering soft materials and electronics toward enhanced compliance, adaptivity, and friendly human machine. This decade has witnessed extraordinary progresses and benefits in scaling down soft robotics to small scale for a wide range of potential and promising applications, including medical and surgical soft robots, wearable and rehabilitation robots, and unconstructed environments exploration. This perspective highlights recent research efforts in miniature soft robotics in a brief and comprehensive way in terms of actuation, powering, designs, fabrication, control, and applications in four sections. Section 2 discusses the key aspects of materials selection and structural designs for small‐scale tethered and untethered actuation and powering, including fluidic actuation, stimuli‐responsive actuation, and soft living biohybrid materials, as well as structural forms from 1D to 3D. Section 3 discusses the advanced manufacturing techniques at small scales for fabricating miniature soft robots, including lithography, mechanical self‐assembly, additive manufacturing, tissue engineering, and other fabrication methods. Section 4 discusses the control systems used in miniature robots, including off‐board/onboard controls and artificial intelligence‐based controls. Section 5 discusses their potential broad applications in healthcare, small‐scale objects manipulating and processing, and environmental monitoring. Finally, outlooks on the challenges and opportunities are discussed.}, journal={ADVANCED INTELLIGENT SYSTEMS}, author={Chi, Yinding and Zhao, Yao and Hong, Yaoye and Li, Yanbin and Yin, Jie}, year={2023}, month={Apr} }
 @article{wang_dong_li_ryu_dong_chen_dai_ke_yin_long_2023, title={A solar/radiative cooling dual-regulation smart window based on shape-morphing kirigami structures}, ISSN={["2051-6355"]}, DOI={10.1039/d3mh00671a}, abstractNote={The energy efficiency of buildings has become a critical issue due to their substantial contribution to global energy consumption. Windows, in particular, are often the least efficient component of the building envelope, and conventional smart windows focus solely on regulating solar transmittance while overlooking radiative cooling. Although several recent designs achieved dual-control of solar and radiative cooling, these windows still face limitations in terms of durability, limited modulation ability and energy-saving performance. To address these challenges, we propose a novel dual-control smart window design consisting of a reconfigurable kirigami structure and polydimethylsiloxane-laminated thermochromic hydrogel coated with silver nanowires. In summer, the thermochromic hydrogel turns translucent to suppress the solar heat gain, while the high emissivity kirigami structure covers the exterior surface of the window, promoting radiative cooling. In winter, the hydrogel becomes transparent to allow for solar transmission. Additionally, the kirigami structure undergoes an out-of-plane structural change, opening towards the outside environment to expose the underlying low-emissivity silver nanowires and suppress heat radiation. Our design achieves a promising solar transmittance modulation ability of ∼24% and a good long-wave infrared emissivity regulation ability of 0.5. Furthermore, it exhibits significantly improved durability, which is nine times longer than the lifespan of conventional smart hydrogels. Our novel approach offers a promising solution for constructing energy-efficient and durable smart windows and outperforms existing state-of-the-art solar/radiative cooling dual-regulation smart windows in the literature.}, journal={MATERIALS HORIZONS}, author={Wang, Shancheng and Dong, Yuting and Li, Yanbin and Ryu, Keunhyuk and Dong, Zhili and Chen, Jian and Dai, Zhendong and Ke, Yujie and Yin, Jie and Long, Yi}, year={2023}, month={Jul} }
 @article{hong_zhao_berman_chi_li_huang_yin_2023, title={Angle-programmed tendril-like trajectories enable a multifunctional gripper with ultradelicacy, ultrastrength, and ultraprecision}, volume={14}, ISSN={["2041-1723"]}, DOI={10.1038/s41467-023-39741-6}, abstractNote={Achieving multicapability in a single soft gripper for handling ultrasoft, ultrathin, and ultraheavy objects is challenging due to the tradeoff between compliance, strength, and precision. Here, combining experiments, theory, and simulation, we report utilizing angle-programmed tendril-like grasping trajectories for an ultragentle yet ultrastrong and ultraprecise gripper. The single gripper can delicately grasp fragile liquids with minimal contact pressure (0.05 kPa), lift objects 16,000 times its own weight, and precisely grasp ultrathin, flexible objects like 4-μm-thick sheets and 2-μm-diameter microfibers on flat surfaces, all with a high success rate. Its scalable and material-independent design allows for biodegradable noninvasive grippers made from natural leaves. Explicitly controlled trajectories facilitate its integration with robotic arms and prostheses for challenging tasks, including picking grapes, opening zippers, folding clothes, and turning pages. This work showcases soft grippers excelling in extreme scenarios with potential applications in agriculture, food processing, prosthesis, biomedicine, minimally invasive surgeries, and deep-sea exploration.}, number={1}, journal={NATURE COMMUNICATIONS}, author={Hong, Yaoye and Zhao, Yao and Berman, Joseph and Chi, Yinding and Li, Yanbin and Huang, He and Yin, Jie}, year={2023}, month={Aug} }
 @article{ke_li_liu_zhu_wang_li_lin_zhang_hu_dong_et al._2023, title={Bio-Inspired, Scalable, and Tri-Mode Stimuli-Chromic Composite for Smart Window Multifunctionality}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.202305998}, abstractNote={Smart window is promising to save building energy and reduce carbon emissions. The fast development leads to a high demand for multifunctionality not limited to energy saving, while the material design and fabrication are challenging. Herein, a scalable method is developed for tri‐mode light regulations: thermo‐, mechano‐, and hydro‐/solvato‐chromisms. The film is constructed of a bio‐inspired hierarchical‐structured surface and a functional elastomer base. Through combined experiments and simulations, the triple‐stimuli‐chromic mechanisms of strain‐induced surface structure deformations, wettability‐controlled reflective index matches, and thermal‐responsive nanostructural resonances, respectively are revealed. Besides a good energy‐saving performance, the robust method shows several advantages: 1) independent energy‐saving and privacy functionalities, 2) an additional hydro‐/solvato‐chromic mode to control privacy in extreme circumstances, and 3) designable patterns and colors to meet high aesthetic demand. The work may inspire the future development of multifunctional smart windows and spatio‐temporal light control methods.}, journal={ADVANCED FUNCTIONAL MATERIALS}, author={Ke, Yujie and Li, Na and Liu, Yan and Zhu, Tingting and Wang, Shancheng and Li, Yanbin and Lin, Gaojian and Zhang, Qiuting and Hu, Yuwei and Dong, Zhaogang and et al.}, year={2023}, month={Sep} }
 @article{ke_ruan_li_wang_wang_zhang_pan_nair_yin_yang_2023, title={Engineering Dynamic Structural Color Pixels at Microscales by Inhomogeneous Strain-Induced Localized Topographic Change}, ISSN={["1530-6992"]}, DOI={10.1021/acs.nanolett.3c00808}, abstractNote={Structural colors in homogeneous elastomeric materials predominantly exhibit uniform color changes under applied strains. However, juxtaposing mechanochromic pixels that exhibit distinct responses to applied strain remains challenging, especially on the microscale where the demand for miscellaneous spectral information increases. Here, we present a method to engineer microscale switchable color pixels by creating localized inhomogeneous strain fields at the level of individual microlines. Trenches produced by transfer casting from 2.5D structures into elastomers exhibit a uniform structural color in the unstretched state due to interference and scattering effects, while they show different colors under an applied uniaxial strain. This programmable topographic change resulting in color variation arises from strain mismatch between layers and trench width. We utilized this effect to achieve the encryption of text strings with Morse code. The effective and facile design principle is promising for diverse optical devices based on dynamic structures and topographic changes.}, journal={NANO LETTERS}, author={Ke, Yujie and Ruan, Qifeng and Li, Yanbin and Wang, Hao and Wang, Hongtao and Zhang, Wang and Pan, Chengfeng and Nair, Parvathi Nair Suseela and Yin, Jie and Yang, Joel K. W.}, year={2023}, month={Jun} }
 @article{xin_wang_li_li_2023, title={Finite deformation analysis of the rotating cylindrical hollow disk composed of functionally-graded incompressible hyper-elastic material}, volume={44}, ISSN={["1573-2754"]}, DOI={10.1007/s10483-023-3014-6}, number={8}, journal={APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION}, author={Xin, Libiao and Wang, Yang and Li, Zhiqiang and Li, Y. B.}, year={2023}, month={Aug}, pages={1367–1384} }
 @article{xin_li_wang_li_2023, title={Magnetic Poles Enabled Kirigami Meta-Structure for High-Efficiency Mechanical Memory Storage}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.202310969}, abstractNote={Some bi/multi‐stable mechanical meta‐structures are implemented as mechanical memory devices, which are with limits such as complex structural forms, low information storage capability and/or fragile structural stability to maintain the stored information bits robustly under external interferences. To address these issues, the structural intelligence is addressed by constructing a simple 3D‐printable multi‐layered cylindrical kirigami module with gradient structural parameters and a high‐efficiency mechanical memory device that can robustly store information bits exponentially larger than previous designs is proposed. The promising enhancement of information storage capability is demonstrated for the proposed mechanical memory device and relies on two mechanisms: 1) the deformation sequences of the kirigami module enabled by the gradient structural parameter, which brings the extra dimensional degree of freedom to break the traditional mechanical memory unit with only planar form and merits information bits with spatially combinatorial programmability, and 2) the combinatorics of the deformation independences among the cylindrical kirigami unit arrays in the constructed mechanical memory device. Particularly, both the structural stabilities and the desired structural robustness are achieved in the mechanical memory devices by additively introducing magnetic “N–S” poles in units, which can protect the stored information from interferences like mechanical crushing, impact, and/or vibration.}, journal={ADVANCED FUNCTIONAL MATERIALS}, author={Xin, Libiao and Li, Yanbin and Wang, Baolong and Li, Zhiqiang}, year={2023}, month={Nov} }
 @article{zhao_hong_li_qi_qing_su_yin_2023, title={Physically intelligent autonomous soft robotic maze escaper}, volume={9}, ISSN={["2375-2548"]}, DOI={10.1126/sciadv.adi3254}, abstractNote={Autonomous maze navigation is appealing yet challenging in soft robotics for exploring priori unknown unstructured environments, as it often requires human-like brain that integrates onboard power, sensors, and control for computational intelligence. Here, we report harnessing both geometric and materials intelligence in liquid crystal elastomer–based self-rolling robots for autonomous escaping from complex multichannel mazes without the need for human-like brain. The soft robot powered by environmental thermal energy has asymmetric geometry with hybrid twisted and helical shapes on two ends. Such geometric asymmetry enables built-in active and sustained self-turning capabilities, unlike its symmetric counterparts in either twisted or helical shapes that only demonstrate transient self-turning through untwisting. Combining self-snapping for motion reflection, it shows unique curved zigzag paths to avoid entrapment in its counterparts, which allows for successful self-escaping from various challenging mazes, including mazes on granular terrains, mazes with narrow gaps, and even mazes with in situ changing layouts.}, number={36}, journal={SCIENCE ADVANCES}, author={Zhao, Yao and Hong, Yaoye and Li, Yanbin and Qi, Fangjie and Qing, Haitao and Su, Hao and Yin, Jie}, year={2023}, month={Sep} }
 @article{xin_xu_li_li_2022, title={A Mori-Tanaka method based theoretical approximation for functionally graded thick wall tube under combined thermal and mechanical loads}, ISSN={["1521-074X"]}, DOI={10.1080/01495739.2022.2155743}, abstractNote={Abstract In this work, a FGM thick wall tube under both thermal and mechanical loadings is studied by referring to the Mori-Tanaka method. The studied FGM tube is assumed to be made of two distinct linear elastically deformable materials equipped with unique volume fractions. Specially, its material parameters are firstly evaluated in the scheme of the Mori-Tanaka method which can more accurately depict the effective material properties of FGMs composites. Later, we derive the ordinary differential equation (ODE) of the displacement along radial direction, based on which we determine the approximate analytical results of displacement and later derive explicit forms of stress components along all the radial, axial and circumferential directions. After comparison, we found that the derived analytical results agree well with that obtained through numerical method. Moreover, for the same researching problem we found the Mori-Tanaka method could outperform the Voigt method. Further, the results are valid for materials with different Poisson’s ratios rather than constant Poisson’s ratios usually used in the existing references. Finally, parametric studies are also conducted by exploring the variations of the displacement and stress components affected by different volume fractions and distinct thermal conductivities and expansion coefficients.}, journal={JOURNAL OF THERMAL STRESSES}, author={Xin, Libiao and Xu, Jifeng and Li, Zhiqiang and Li, Yanbin}, year={2022}, month={Dec} }
 @misc{chi_li_zhao_hong_tang_yin_2022, title={Bistable and Multistable Actuators for Soft Robots: Structures, Materials, and Functionalities}, volume={34}, ISSN={["1521-4095"]}, DOI={10.1002/adma.202110384}, abstractNote={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.}, number={19}, journal={ADVANCED MATERIALS}, author={Chi, Yinding and Li, Yanbin and Zhao, Yao and Hong, Yaoye and Tang, Yichao and Yin, Jie}, year={2022}, month={May} }
 @article{hong_chi_wu_li_zhu_yin_2022, title={Boundary curvature guided programmable shape-morphing kirigami sheets}, volume={13}, ISSN={["2041-1723"]}, DOI={10.1038/s41467-022-28187-x}, abstractNote={Abstract Kirigami, a traditional paper cutting art, offers a promising strategy for 2D-to-3D shape morphing through cut-guided deformation. Existing kirigami designs for target 3D curved shapes rely on intricate cut patterns in thin sheets, making the inverse design challenging. Motivated by the Gauss-Bonnet theorem that correlates the geodesic curvature along the boundary with the Gaussian curvature, here, we exploit programming the curvature of cut boundaries rather than the complex cut patterns in kirigami sheets for target 3D curved morphologies through both forward and inverse designs. The strategy largely simplifies the inverse design. Leveraging this strategy, we demonstrate its potential applications as a universal and nondestructive gripper for delicate objects, including live fish, raw egg yolk, and a human hair, as well as dynamically conformable heaters for human knees. This study opens a new avenue to encode boundary curvatures for shape-programing materials with potential applications in soft robotics and wearable devices.}, number={1}, journal={NATURE COMMUNICATIONS}, author={Hong, Yaoye and Chi, Yinding and Wu, Shuang and Li, Yanbin and Zhu, Yong and Yin, Jie}, year={2022}, month={Jan} }
 @article{ke_li_wu_wang_yang_yin_tan_long_2022, title={On-Demand Solar and Thermal RadiationManagement Based on Switchable Interwoven Surfaces}, volume={7}, ISSN={["2380-8195"]}, DOI={10.1021/acsenergylett.2c00419}, abstractNote={On-demand and selective regulation of the radiative cooling (long-wave infrared, LWIR) and solar heat gain (ultraviolet-, visible- and near-IR, UV–vis–NIR) of building facades is a grand challenge but essential to decrease energy usage in buildings. Here, we report a reconfigurable interwoven surface that can dynamically switch the overlapping sequence to achieve spectral selectivity and ultrabroadband modulations for windows, walls/roofs with decent spectral modulations, and energy-saving performance. The result surpasses the best reported passive radiative cooling smart windows with a more than doubled visible transmittance (Tlum = 0.50) and LWIR modulation (Δ εLWIR = 0.57). Our energy-saving samples outperform the commercial building materials across climate zones 2–6. This design principle is scalable and applicable for diverse materials, interwoven structures, and 2D-3D surfaces, which provide a strategy to give programmable heating/cooling modulations in various applications.}, number={5}, journal={ACS ENERGY LETTERS}, author={Ke, Yujie and Li, Yanbin and Wu, Lichen and Wang, Shancheng and Yang, Ronggui and Yin, Jie and Tan, Gang and Long, Yi}, year={2022}, month={May}, pages={1758–1763} }
 @article{chi_hong_zhao_li_yin_2022, title={Snapping for high-speed and high-efficient butterfly stroke-like soft swimmer}, volume={8}, ISSN={["2375-2548"]}, DOI={10.1126/sciadv.add3788}, abstractNote={Natural selection has tuned many flying and swimming animals to share the same narrow design space for high power efficiency, e.g., their dimensionless Strouhal numbers St that relate flapping frequency and amplitude and forward speed fall within the range of 0.2 < St < 0.4 for peak propulsive efficiency. It is rather challenging to achieve both comparably fast-speed and high-efficient soft swimmers to marine animals due to the naturally selected narrow design space and soft body compliance. Here, bioinspired by the flapping motion in swimming animals, we report leveraging snapping instabilities for soft flapping-wing swimmers with comparable high performance to biological counterparts. The lightweight, butterfly stroke–like soft swimmer (2.8 g) demonstrates a record-high speed of 3.74 body length/s (4.8 times faster than the reported fastest flapping soft swimmer), high power efficiency (0.2 < St = 0.25 < 0.4), low energy consumption cost, and high maneuverability (a high turning speed of 157°/s).}, number={46}, journal={SCIENCE ADVANCES}, author={Chi, Yinding and Hong, Yaoye and Zhao, Yao and Li, Yanbin and Yin, Jie}, year={2022}, month={Nov} }
 @article{li_chu_li_dui_deng_2022, title={Study on PN heterojunctions associated bending coupling in flexoelectric semiconductor composites considering the effects of size-dependent and symmetry-breaking}, volume={132}, ISSN={["1089-7550"]}, DOI={10.1063/5.0102209}, abstractNote={Under bending deformation, size-dependent and structure-associated strain gradients can occur at the interface of a flexoelectric semiconductor (FS) PN heterojunction. Consequentially, a giant flexoelectric coupling will be induced to significantly enhance the flexoelectric effect of FS structures. To better understand the strain gradient–enhanced modulation performance and also reveal some other new phenomena, in this work, we theoretically and numerically study a beam shaped FS laminated composite subjected to pure bending loads. We first establish a one-dimensional theoretical model and then numerically explore the mechanical behaviors of the selected FS beam laminate. During analysis, structural symmetry breaking and size effect are considered by tuning the beam structural size and material parameters. We find that different from piezoelectric semiconductors whose mobile charges are driven by the piezo-potential, the mobile charges of FS composites induced by the flexo-potential are deterministically associated with strain gradients. Moreover, the strain gradients can exhibit a strong size-dependent effect and are quite sensitive to structural asymmetry and material parameters. We believe that our work can provide a new way to tune the carrier transport and electromechanical characteristics of a PN junction and thus can be useful to guide the next-generation flexotronic device designs.}, number={12}, journal={JOURNAL OF APPLIED PHYSICS}, author={Li, Haoqing and Chu, Liangliang and Li, Yanbin and Dui, Guansuo and Deng, Qian}, year={2022}, month={Sep} }
 @article{li_zhang_hong_yin_2021, title={3D Transformable Modular Kirigami Based Programmable Metamaterials}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.202105641}, abstractNote={Kirigami, the ancient paper art of cutting, has recently emerged as a new approach to construct metamaterials with novel properties imparted by cuts. However, most studies are limited to thin sheets‐based 2D kirigami metamaterials with specific forms and limited reconfigurability due to planar connection constraints of cut units. Here, 3D modular kirigami is introduced by cutting bulk materials into spatially closed‐loop connected cut cubes to construct a new class of 3D kirigami metamaterials. The module is transformable with multiple degrees of freedom that can transform into versatile distinct daughter building blocks. Their conformable assembly creates a wealth of reconfigurable and disassemblable metamaterials with diverse structures and unique properties, including reconfigurable 1D column‐like materials, 2D lattice‐like metamaterials with phase transition of chirality, as well as 3D frustration‐free multilayered metamaterials with 3D auxetic behaviors and programmable deformation modes. This study largely expands the design space of kirigami metamaterials from 2D to 3D.}, journal={ADVANCED FUNCTIONAL MATERIALS}, author={Li, Yanbin and Zhang, Qiuting and Hong, Yaoye and Yin, Jie}, year={2021}, month={Jul} }
 @article{chu_dui_mei_liu_li_2021, title={An analysis of flexoelectric coupling associated electroelastic fields in functionally graded semiconductor nanobeams}, volume={130}, ISSN={["1089-7550"]}, DOI={10.1063/5.0057702}, abstractNote={Strain gradient with strong size dependency and structural association (geometry or microstructure) can efficiently tune the performances of semiconductors by the flexoelectric coupling effect. In this work, we studied a novel asymmetric beam-like semiconductor made by functionally graded (FG) flexoelectric materials. When being applied with pure bending loads at two ends, it can generate a relatively large inhomogeneous strain field to achieve obvious semiconducting behaviors. Unlike the analysis for piezoelectric semiconductor materials, we considered the effects of flexoelectricity and strain gradient elasticity in constitutive equations for flexoelectric semiconductor materials. Then, the complicated mutual coupling governing equations and associated boundary conditions are rederived strictly. By the Fourier series expansion and spatial integration methods, we obtained the solutions of the set of partial differential equations with non-constant coefficients. Results show that the semiconducting electromechanical coupling performances of the beam-like FG flexoelectric semiconductor depend heavily on the ratio and structural distributions of its constituent. Moreover, it is found that the inner carrier distributions and electromechanical characteristics can be significantly tuned by the strain gradient elasticity, the flexoelectricity, and the structural size. We believe this work provides a useful guideline for the practical design and manufacture of novel electromechanical semiconductor devices.}, number={11}, journal={JOURNAL OF APPLIED PHYSICS}, author={Chu, Liangliang and Dui, Guansuo and Mei, Hai and Liu, Lisheng and Li, Yanbin}, year={2021}, month={Sep} }
 @article{li_song_liu_yin_2021, title={Geometric mechanics of folded kirigami structures with tunable bandgap}, volume={49}, ISSN={["2352-4316"]}, DOI={10.1016/j.eml.2021.101483}, abstractNote={We study the geometric mechanics and tunable band structures of a recently developed new class of folded kirigami structures through experiments, theoretical modeling, and numerical simulation. The folded kirigami structures with square and triangular cut patterns are constructed by replacing the point hinge in conventional kirigami sheets with a 3D folding hinge. We find that the folded design can effectively overcome the polarization constraint in the conventional kirigami sheets without folds. Specially, as the creases continue to fold from 0° to 180°, the folded design achieves a unique polarization switch, i.e., the structure expands first and then shrinks to be even smaller than that before folding. Geometric mechanics models are developed to predict how the geometry of the folding hinges determines both the shape changes and structural responses, including nominal strains, polarization switch, Poisson’s ratio, folding rate, surface porosity, and structural stiffness. The models are validated through related experiments. We find that the observed polarization switch corresponds to both the peak nominal strains and stiffness singularity in the structures. Lastly, we numerically explore its shape change induced tunable phononic bandgap structures. We find that for special designs with polarization switch, it leads to symmetric bandgap structures changing with the folding angle. This work could find potential applications in designing kirigami metamaterials, shape-morphing materials, and phononic materials with tunable band structures.}, journal={EXTREME MECHANICS LETTERS}, author={Li, Yanbin and Song, Xiaolei and Liu, Haijun and Yin, Jie}, year={2021}, month={Nov} }
 @article{li_yin_2021, title={Metamorphosis of three-dimensional kirigami-inspired reconfigurable and reprogrammable architected matter}, volume={21}, ISSN={["2542-5293"]}, DOI={10.1016/j.mtphys.2021.100511}, abstractNote={Most shape-morphing materials are limited to one-to-one shape-changing process, i.e., one design corresponds to one target shape, thus it is hard to be reshaped due to the constraint of limited mobilities (degrees of freedom). Here, we propose harnessing kinematic bifurcation in mechanisms with multiple branched transformation paths to achieve enhanced reconfigurability and shape reprogrammability in a new class of three-dimensional (3D) kirigami-inspired architected matter. The reconfigurable and reprogrammable architected matter is constructed from planar tessellation of 3D kirigami-inspired transformable modules. The module consisting of eight closed-loop connected cubes exhibits both 3D non-bifurcated and bifurcated transformation modes, the motions of which are well captured by the developed kinematics model. The modules can be periodically tessellated in plane to form a flat, thick panel in both a diluted (with voids) and compact (without voids) pattern with multiple encoded, compatible transformation modes. Consequently, it can undergo a series of consecutive shape changes by reconfiguring into varieties of 3D transformable architectures that are conceptually in analogy to metamorphosis in some living organisms during growth. The endowed rich mobilities are found to derive from the kinematic bifurcation. Among them, a unique transformed 3D architecture can be further reprogrammed to reconfigure into multiple architected shapes with zero and non-zero Gaussian curvature through both forward and inverse designs. Such 3D reconfigurable kinematic matter is attractive for potential applications in reconfigurable metamaterials and morphing architectures.}, journal={MATERIALS TODAY PHYSICS}, author={Li, Yanbin and Yin, Jie}, year={2021}, month={Nov} }
 @article{li_zhao_chi_hong_yin_2021, title={Shape-morphing materials and structures for energy-efficient building envelopes}, volume={22}, ISSN={["2468-6069"]}, DOI={10.1016/j.mtener.2021.100874}, abstractNote={Buildings account for 30% of global energy consumption. Improving the energy efficiency of buildings becomes essential to reducing energy consumption for alleviating their deteriorating impacts on the environment. As one of the key elements, the building envelope is essential to reducing the building energy consumption. Recent researches have demonstrated the promise of environmentally adaptive shape-morphing building envelopes in enhancing energy efficiency over the conventional stationary ones. In this review, we briefly discuss the recent advances in energy-efficient shape-morphing building envelopes from both structural designs and engineering materials viewpoints for energy saving and energy harvesting. For structural designs, we discuss the designs and performances of four representative categories of shape-morphing building envelopes, including conventional dynamic façades with simple rigid motions, biomimic adaptive structures, reconfigurable kirigami/origami-based structures, and morphable wrinkling surface–based smart windows. For materials design, we discuss the typical materials and design strategies used for actuating the shape-morphing building envelopes and smart windows. We expect that this brief review will be insightful for developing future shape-morphing building envelopes to make buildings more energetically efficient, comfortable, and environmentally friendly.}, journal={MATERIALS TODAY ENERGY}, author={Li, Yanbin and Zhao, Yao and Chi, Yinding and Hong, Yaoye and Yin, Jie}, year={2021}, month={Dec} }
 @article{chu_li_dui_2020, title={Nonlinear analysis of functionally graded flexoelectric nanoscale energy harvesters}, volume={167}, ISSN={["1879-2162"]}, DOI={10.1016/j.ijmecsci.2019.105282}, abstractNote={Due to the strong size-dependent property, flexoelectricity is one of the most advantageous applications of piezoelectricity on the micro/nano scale energy harvesting. However, rare researches have been conducted on energy harvesters composed by functionally graded flexoelectric materials (FGFMs). In this paper, the nonlinear vibration of a FGFMs energy harvesting nanobeam with a concentrated mass located at free end is analyzed theoretically while considering the electromechanical coupling effect induced by strain gradients. By referring to the Galerkin's method, the corresponding equations of the coupled system and the approximated closed-form solutions of the electric and the power output are obtained. In numerical part, the influences of the volume ratio of the material components, the gradient index and the loading resistance on the voltage output and power density are studied in detail. It is found that, for FGFMs energy harvester, the effective voltage output and the power density depend enormously on the material constituents, the gradient index, the scaled size and the loading resistance. And the rationality of our proposed model is verified by the numerical results. Thus, we can conclude that, for the energy harvesting triggered by flexoelectricity, the FGFMs may be a good way for device design owing to its easy generation of large strain gradients.}, journal={INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES}, author={Chu, Liangliang and Li, Yanbin and Dui, Guansuo}, year={2020}, month={Feb} }
 @article{tang_li_hong_yang_yin_2019, title={Programmable active kirigami metasheets with more freedom of actuation}, volume={116}, ISSN={["0027-8424"]}, DOI={10.1073/pnas.1906435116}, abstractNote={Significance}, number={52}, journal={PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, author={Tang, Yichao and Li, Yanbin and Hong, Yaoye and Yang, Shu and Yin, Jie}, year={2019}, month={Dec}, pages={26407–26413} }