Metamaterial based on elastic mechanics

Ruan, Ju-Qi; Lu, Ming‐Hui; Chen, YanFeng; Zhu, Shining

doi:10.1360/092014-102

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…In order to explain the mechanism of the effect between LDPE molecular chain structure and additives on the rheological behaviors of PEDA materials, the Doi-Edwards model [39,40] is employed to describe the entanglement characteristics of these systems, as shown in Figure 8. According to the Doi-Edwards model, the shear viscosity equation can be obtained, as given by Equation (4).…”

Section: Coupling Effect Of Ldpe Molecular Chain Structure and Additi...mentioning

confidence: 99%

Coupling Effect of LDPE Molecular Chain Structure and Additives on the Rheological Behaviors of Cable Insulating Materials

Shang

et al. 2023

Polymers

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The rheological behaviors of low-density polyethylene doped with additives (PEDA) determine the dynamic extrusion molding and structure of high-voltage cable insulation. However, the coupling effect of additives and molecular chain structure of LDPE on the rheological behaviors of PEDA is still unclear. Here, for the first time, the rheological behaviors of PEDA under uncross-linked conditions are revealed by experiment and simulation analysis, as well as rheology models. The rheology experiment and molecular simulation results indicate that additives can reduce the shear viscosity of PEDA, but the effect degree of different additives on rheological behaviors is determined by both chemical composition and topological structure. Combined with experiment analysis and the Doi–Edwards model, it demonstrates that the zero-shear viscosity is only determined by LDPE molecular chain structure. Nevertheless, different molecular chain structures of LDPE have different coupling effects with additives on the shear viscosity and non-Newtonian feature. Given this, the rheological behaviors of PEDA are predominant by the molecular chain structure of LDPE and are also affected by additives. This work can provide an important theoretical basis for the optimization and regulation of rheological behaviors of PEDA materials used for high-voltage cable insulation.

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Section: Coupling Effect Of Ldpe Molecular Chain Structure and Additi...mentioning

confidence: 99%

Coupling Effect of LDPE Molecular Chain Structure and Additives on the Rheological Behaviors of Cable Insulating Materials

Shang

et al. 2023

Polymers

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“…Metamaterials are artificial microstructural materials with extraordinary mechanical [1][2][3], thermal [4][5][6], acoustic [7][8][9] and optical [10,11] properties over conventional materials [12]. These properties are dependent on the special designed microstructures rather than the base materials [10,13]. Among them, mechanical metamaterials are a class of artificial materials that exhibit exotic mechanical properties, such as negative thermal expansion [2,14], negative Poisson's ratio auxetic behavior [15,16], multistability [17,18], tunable stiffness [19], etc.…”

Section: Introductionmentioning

confidence: 99%

The design, manufacture and application of multistable mechanical metamaterials-a state-of-the-art review

Xu,

Chen,

Sun

et al. 2023

Int. J. Extrem. Manuf.

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Multistable mechanical metamaterials are a type of mechanical metamaterials with special features, such as reusability, energy storage and absorption capabilities, rapid deformation, and amplified output forces. These metamaterials are usually realized by series and/or parallel of bistable units. They can exhibit multiple stable configurations under external loads and can be switched reversely among each other, thereby realizing the reusability of mechanical metamaterials and offering broad engineering applications. This paper reviews the latest research progress in the design strategy, manufacture and application of multistable mechanical metamaterials. We divide bistable structures into three categories based on their basic element types and provide the criterion of their bistability. Various manufacturing techniques to fabricate these multistable mechanical metamaterials are introduced, including mold casting, cutting, folding and three-dimensional/4D printing. Furthermore, the prospects of multistable mechanical metamaterials for applications in soft driving, mechanical computing, energy absorption and wave controlling are discussed. Finally, this paper highlights possible challenges and opportunities for future investigations. The review aims to provide insights into the research and development of multistable mechanical metamaterials.

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