Bionic structures for optimizing the design of stealth materials

Xu, Zhengkang; Li, Jiatong; Li, Jinzhe; Du, Jiani; Li, Tian; Zeng, Weigui; Qiu, Junhai; Meng, Fanbin

doi:10.1039/d2cp06086h

Cited by 17 publications

(5 citation statements)

References 85 publications

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“…39 For instance, modern airplanes, polar cross-country vehicles, radar systems with electronic frog eyes, and honeycomb structures of aerospace construction engineering have all been obtained through the use of bionic techniques. 40 The research of bionic techniques mainly includes energetic bionics, molecular bionics, mechanical bionics, and information and control bionics, 41 and their respective advantages and disadvantages are shown in Fig. 2.…”

Section: Types Of Bionic Techniques and Bioinspired Aerogel Materialsmentioning

confidence: 99%

Bioinspired aerogels: ingenious structure, remarkable performance, and versatile applications

Sun,

Yang,

et al. 2024

J. Mater. Chem. A

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Section: Types Of Bionic Techniques and Bioinspired Aerogel Materialsmentioning

confidence: 99%

Bioinspired aerogels: ingenious structure, remarkable performance, and versatile applications

Sun,

Yang,

et al. 2024

J. Mater. Chem. A

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“…These structures have special combinations of different scales, and some of the synergies that arise from them can result in unexpected results. [ 129 ] Therefore, designing reasonably bionic multilevel structures can also be an effective method for optimizing absorption performance. For example, Zhu et al prepared TiN fiber material like setaria viridis by electrospinning and hydrothermal synthesis, which consisted of a central fiber and nanoneedles on the outer surface.…”

Section: Design and Regulation Of Morphological Structure Of Electrom...mentioning

confidence: 99%

Structure–Activity Relationship in Microstructure Design for Electromagnetic Wave Absorption Applications

Tian

et al. 2023

Small Structures

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Microwave absorbing materials (MAMs) are materials that effectively absorb incident electromagnetic (EM) wave energy, reducing reflection and scattering. They play a crucial role in enhancing electronic reliability, healthcare, and defense security. However, traditional MAMs like ferrites, magnetic metals, and polymers possess certain limitations, including low impedance matching, narrow absorption bandwidth, poor chemical stability, and high filling ratio, which hinder their further development. To address the requirements of lightweight, wideband, and high‐efficiency absorption, precise structural design has emerged as a captivating research focus. Additionally, comprehending the structure–property relationships between these unique microstructures and EM response and loss mechanisms still poses significant challenges. Herein, a comprehensive review of MAMs is presented with varied structural designs encompassing various scales, providing a detailed introduction of the relationship between various potential structural designs of MAMs and their corresponding EM characteristics and loss mechanisms. Moreover, EM theoretical calculation models, characterization, and analysis methods are discussed. Finally, the article proposes the challenges and prospects for the development of structural design EM wave absorbers.

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“…Recently, the design of bionic materials has become a hot spot in metamaterial design. In order to adapt to the environment, organisms have evolved various unique structures, which provide many ideas for the design of metamaterials [30][31][32][33][34][35][36][37]. Inspired by bamboo and lotus root, Li et al proposed hexagonal, pentagonal, quadrilateral, and triangular multicellular structures to overcome the disadvantages of traditional thin-walled structures, such as excessive force drop after initial peak and large structural mass [38].…”

Section: Introductionmentioning

confidence: 99%

Low-frequency band gap design of acoustic metamaterial based on cochlear structure

Ruan,

Yu,

Hou

et al. 2024

Smart Mater. Struct.

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In this paper, a new chiral spiral structure based on the cochlear structure is proposed. The chiral spiral structure consists of four orthogonally oriented cochlear structures with the same geometric parameters connected at the inner endpoints of the four cochlear structures. Based on the Bloch’s theory and finite element method (FEM), the band gap characteristics of the proposed chiral spiral structure are studied. The effects of ligament bending angle (θ), the ratio of arc radius of cochlear contour (α), the ligament thickness (tc), and the level of the chiral spiral structure (n) on the chiral spiral structure are discussed. The results show that the two-level chiral spiral structure (n = 2) has the best band gap characteristics when θ = 180° and α = 0.45. With the decrease of tc and the increase of n, the opening frequency of the first band gap gradually decreases. When n = 22, the chiral spiral structure has the lowest opening frequency, 1.91 Hz. The existence of the band gap is verified through the low amplitude elastic wave transmission tests. The distribution of the iso-frequency lines indicates that with the increase of the level of the chiral spiral structure (n), the propagation of elastic waves of the chiral spiral structure shows more distinct directivity, which provides a basis for the propagation control of elastic waves. These findings can provide new design ideas and directions for low-frequency vibration and noise control.

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Bionic structures for optimizing the design of stealth materials

Abstract: Traditional microwave absorbing materials (MAMs) have exposed more and more problems in multi-spectrum detection and harsh service environment, which hinder their further application. Bionic materials and structures have attracted more...

Cited by 17 publications

References 85 publications

Bioinspired aerogels: ingenious structure, remarkable performance, and versatile applications

Bioinspired aerogels: ingenious structure, remarkable performance, and versatile applications

Structure–Activity Relationship in Microstructure Design for Electromagnetic Wave Absorption Applications

Low-frequency band gap design of acoustic metamaterial based on cochlear structure

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