Unprecedented mechanical wave energy absorption observed in multifunctional bioinspired architected metamaterials

IF 8.6 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Npg Asia Materials Pub Date : 2024-09-13 DOI:10.1038/s41427-024-00565-5
Zhendong Li, Xinxin Wang, Kexin Zeng, Zichao Guo, Chong Li, Xiang Yu, Seeram Ramakrishna, Zhonggang Wang, Yang Lu
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Abstract

In practical engineering, noise and impact hazards are pervasive, indicating the pressing demand for materials that can absorb both sound and stress wave energy simultaneously. However, the rational design of such multifunctional materials remains a challenge. Herein, inspired by cuttlebone, we present bioinspired architected metamaterials with unprecedented sound-absorbing and mechanical properties engineered via a weakly-coupled design. The acoustic elements feature heterogeneous multilayered resonators, whereas the mechanical responses are based on asymmetric cambered cell walls. These metamaterials experimentally demonstrated an average absorption coefficient of 0.80 from 1.0 to 6.0 kHz, with 77% of the data points exceeding the desired 0.75 threshold, all with a compact 21 mm thickness. An absorptance-thickness map is devised for assessing the sound-absorption efficiency. The high-fidelity microstructure-based model reveals the air friction damping mechanism, with broadband behavior attributed to multimodal hybrid resonance. Empowered by the cambered design of cell walls, metamaterials shift catastrophic failure toward a progressive deformation mode characterized by stable stress plateaus and ultrahigh specific energy absorption of 50.7 J/g—a 558.4% increase over the straight-wall design. After the deformation mechanisms are elucidated, a comprehensive research framework for burgeoning acousto-mechanical metamaterials is proposed. Overall, our study broadens the horizon for multifunctional material design.

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在多功能生物启发结构超材料中观察到前所未有的机械波能量吸收现象
在实际工程中,噪音和撞击危害无处不在,这表明人们迫切需要能够同时吸收声波和应力波能量的材料。然而,如何合理设计这种多功能材料仍是一项挑战。在此,我们受海螵蛸的启发,通过弱耦合设计,提出了具有前所未有的吸音和机械特性的生物启发结构超材料。声学元件采用异质多层谐振器,而机械响应则基于不对称的凸面细胞壁。实验证明,这些超材料在 1.0 至 6.0 千赫范围内的平均吸声系数为 0.80,77% 的数据点超过了所需的 0.75 临界值,而且厚度仅为 21 毫米。为评估吸声效率,设计了吸声厚度图。基于微结构的高保真模型揭示了空气摩擦阻尼机制,宽带行为归因于多模态混合共振。在细胞壁外凸设计的推动下,超材料将灾难性失效转变为渐进变形模式,其特点是稳定的应力高原和 50.7 J/g 的超高比能量吸收,比直壁式设计提高了 558.4%。在阐明变形机制之后,我们提出了一个针对新兴声学-机械超材料的综合研究框架。总之,我们的研究拓宽了多功能材料设计的视野。
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来源期刊
Npg Asia Materials
Npg Asia Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
15.40
自引率
1.00%
发文量
87
审稿时长
2 months
期刊介绍: NPG Asia Materials is an open access, international journal that publishes peer-reviewed review and primary research articles in the field of materials sciences. The journal has a global outlook and reach, with a base in the Asia-Pacific region to reflect the significant and growing output of materials research from this area. The target audience for NPG Asia Materials is scientists and researchers involved in materials research, covering a wide range of disciplines including physical and chemical sciences, biotechnology, and nanotechnology. The journal particularly welcomes high-quality articles from rapidly advancing areas that bridge the gap between materials science and engineering, as well as the classical disciplines of physics, chemistry, and biology. NPG Asia Materials is abstracted/indexed in Journal Citation Reports/Science Edition Web of Knowledge, Google Scholar, Chemical Abstract Services, Scopus, Ulrichsweb (ProQuest), and Scirus.
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