Achieving adjustable elasticity with non-affine to affine transition

Shen, Xiangying; Fang, Chenchao; Jin, Zhipeng; Tong, Hua; Tang, Shixiang; Shen, Hongchuan; Xu, Nanping; Lo, Jack Hau Yung; Xu, Xinliang; Xu, Lei

doi:10.1038/s41563-021-01046-8

Cited by 16 publications

(12 citation statements)

References 45 publications

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“…In fact, we have move a step forward recently to join the collaboration in experimentally designing disordered and auxetic spring networks. [ 17 ] Moreover, because disorder is everywhere, a deeper understanding of disorder and its consequences should be also helpful to chemical processes such as chemical dopping, because the dopping is in fact one of the ways to cause disorder.…”

Section: Discussionmentioning

confidence: 99%

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Emergent Physics on the Route from Crystals to Amorphous Solids

Jiang

2022

Chin. J. Chem.

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Comprehensive Summary By introducing and gradually increasing the magnitude of disorder into both crystalline particle packings and crystalline networks, we realize the evolution from crystals to amorphous solids. The evolution of structures and mechanical properties during this process is expected to help us understand the physical origin of the peculiar properties of amorphous solids, e.g., the boson peak, so as to build up the bridge between well‐established physics of crystals and that of amorphous solids. To our surprise, this attempt also reveals some extraordinary phenomena, including the hidden order‐disorder transition from crystals to disordered crystals and the emergence of mechanical metamaterials with negative Poisson's ratios. What is the most favorite and original chemistry developed in your research group? Our favorite research findings are some extraordinary phase behaviors of soft‐core particle systems, including the discontinuous‐continuous transition of two‐dimensional melting, formation of quasicrystals and the transition from crystals to disordered crystals discussed in this article. How do you get into this specific field? Could you please share some experiences with our readers? I entered the field of soft matter during my graduate study at Yale University. I have been attracted by so many interesting and complex problems in soft matter. During the research, we keep meeting new phenomena and problems, which keep broadening my interest. Learning by doing is a good way to enjoy research. How do you supervise your students? I always assign one or two problems to beginners. The problems may not be very specific. My purpose is to encourage the students to work independently and cultivate their abilities of literature reading and finding and solving problems. I listen to their reports in weekly group meetings and discuss about their work whenever they come to show their progress or I have some new ideas. Once they achieve some significant progress, I will put more effort to help finalize their work. What is the most important personality for scientific research? Persistence. What are your hobbies? Jogging, walking, music, and movies. What is your favorite journal(s)? Physical Review series.

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Section: Discussionmentioning

confidence: 99%

“…[ 9,15‐16 ] Due to these anomalies of modes, amorphous solids also exhibit rather different mechanical properties from crystals, which can also be utilized to design mechanical metamaterials. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

Emergent Physics on the Route from Crystals to Amorphous Solids

Jiang

2022

Chin. J. Chem.

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“…The electron releases (absorbs) heat to the outside world as it moves from a region of high (low) energy level to a region of low (high) energy level. Inspired by this concept, the electric field can be treated as a tunable parameter 35 to manipulate the thermal field.…”

Section: Introductionmentioning

confidence: 99%

“…level. Inspired by this concept, the electric field can be treated as a tunable parameter 35 to manipulate the thermal field.…”

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confidence: 99%

Multiple control of thermoelectric dual‐function metamaterials

Zhuang

Huang

2023

Int Journal of Mech Sys Dyn

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Thermal metamaterials based on transformation theory offer a practical design for controlling heat flow by engineering spatial distributions of material parameters, implementing interesting functions such as cloaking, concentrating, and rotating. However, most existing designs are limited to serving a single target function within a given physical domain. Here, we analytically prove the form invariance of thermoelectric (TE) governing equations, ensuring precise controls of the thermal flux and electric current. Then, we propose a dual‐function metamaterial that can concentrate (or cloak) and rotate the TE field simultaneously. In addition, we introduce two practical control methods to realize corresponding functions: one is a temperature‐switching TE rotating concentrator cloak that can switch between cloaking and concentrating; the other is an electrically controlled TE rotating concentrator that can handle the temperature field precisely by adjusting external voltages. The theoretical predictions and finite‐element simulations agree well with each other. This work provides a unified framework for manipulating the direction and density of the TE field simultaneously and may contribute to the study of thermal management, such as thermal rectification and thermal diodes.

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“…[ 3–5 ] Non‐Hookean materials are also beneficial in metamaterials, since their broadly adjustable elasticity can flexibly respond to external environments. [ 1,6 ] The mechanical responses of non‐Hookean elastic materials cannot be characterized by a constant coefficient, but are described by parameters that are functions of the deformation. The non‐Hookean behaviors greatly extend the diversity and adaptability of materials in manipulating their mechanical properties, and play a pivotal role in miniaturizing machines, such as nanoelectromechanical systems, nanorobots, and soft machines.…”

Section: Introductionmentioning

confidence: 99%

Non‐Hookean Droplet Spring for Enhancing Hydropower Harvest

Xue

Liu

et al. 2022

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Nonlinear elastic materials are significant for engineering and micromechanics. Droplets with the merits of easy‐accessibility, diversity, and energy‐absorption capability exhibit a variety of non‐Hookean elastic behaviors. Herein, benefiting from the confinement of heterogeneous‐wettable parallel plates, the non‐Hookean mechanics of the droplet‐based spring are systematically investigated. Experimental results and theoretical analysis reveal that the force generated by the spring varies nonlinearly with its deformation, and a force model is accordingly built to depict the mechanics of springs with different sized/numbered droplets and confined by different wettability patterns. Importantly, for the droplet‐based spring, the droplet‐plate contact area expands nonlinearly with the pressing force, which is employed to optimize the output performance of the droplet‐based triboelectric nanogenerator to 226% compared with the control test. This finding deepens the understanding of the non‐Hookean behavior of droplet‐based springs, and sheds light on applications in energy harvesting, micromechanics, and miniature optic/electric devices.

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Achieving adjustable elasticity with non-affine to affine transition

Cited by 16 publications

References 45 publications

Emergent Physics on the Route from Crystals to Amorphous Solids

Emergent Physics on the Route from Crystals to Amorphous Solids

Multiple control of thermoelectric dual‐function metamaterials

Non‐Hookean Droplet Spring for Enhancing Hydropower Harvest

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