Bio-inspired elastic metamaterial by B-form DNA: Programmable dual helix structures for low-frequency longitudinal wave prohibition

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2025-04-01 Epub Date: 2025-02-19 DOI:10.1016/j.compstruct.2025.118986

Yumei Chen , Lei Yang , Jia Lou , Ji Wang , Matteo Filippi , Erasmo Carrera , Xiang Fang

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Abstract

Motivated by the attractive mechanical properties and the wealth of biological genetic information carried by the DNA structures, we proposed a novel B-form DNA Dual Helix Metamaterial (DHM) in this paper, which has programmable longitudinal wave propagation properties. A dual helix DNA metamaterial is first designed to follow the natural geometry of the B-form DNA structures. To mimic the programming of genetic information in DNA, four types of mass blocks, each made from different materials (i.e., iron, aluminum, nylon, and foam), are selected to serve as the base pairs within the 3D-printed dual helix frame. The elastic wave propagation properties of the DHM, which have unitary mass blocks of different materials, are first compared to comprehend the encoding characteristics of the dual helix metamaterials. After that, a mixed model of DHM, comprising randomly arranged mass blocks, is used to reveal the extensive programmable features for elastic wave propagation. In addition, the influence of the structure parameters, including the helix’s size and the base plates’ thickness, are investigated. Finally, a laser vibrometer system is used to validate the analysis of the proposed elastic metamaterial, experimentally. The investigation in this paper paves the way for broadband low-frequency vibration isolation for engineering applications.

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基于b型DNA的仿生弹性超材料：可编程双螺旋结构用于低频纵波抑制

基于DNA结构具有良好的力学性能和丰富的生物遗传信息，本文提出了一种具有可编程纵波传播特性的新型b型DNA双螺旋超材料（DHM）。双螺旋DNA超材料首先被设计为遵循b型DNA结构的自然几何形状。为了模拟DNA中遗传信息的编程，选择了四种类型的质量块，每种块由不同的材料（即铁、铝、尼龙和泡沫）制成，作为3d打印双螺旋框架内的碱基对。首先比较了具有不同材料的统一质量块的双螺旋超材料的弹性波传播特性，以了解双螺旋超材料的编码特性。在此基础上，建立了由随机排列的质量块组成的混合模型，揭示了弹性波传播的广泛可编程特征。此外，还研究了螺旋尺寸和底板厚度等结构参数的影响。最后，利用激光测振仪系统对所提出的弹性超材料进行了实验验证。本文的研究为工程应用的宽带低频隔振奠定了基础。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.