Damping properties of single-material and bi-material lattice structures

IF 7.9 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design Pub Date : 2025-09-06 DOI:10.1016/j.matdes.2025.114710

Haotian Wang, Bin Niu, Rui Yang

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Abstract

Lattice structure is widely used to achieve lightweight while damping is an indispensable property for evaluating the dynamic properties of lattice structures. This paper studies the damping performance of the lattice structures by experiments and analysis. A series of lattice specimens including single-material and bi-material lattices are prepared. The bi-material lattice is designed by filling the metal lattice with epoxy material. By this way, the stiffness of the bi-material lattice is guaranteed, and the effect of vibration absorption is realized at the same time. Different from the traditional proportional damping method of single-material structure, the non-proportional damping model is used for the bi-material lattice structure. The homogenization method is used to calculate the equivalent complex modulus of the lattice. An inverse method is proposed in this paper to obtain the loss factor of in-situ epoxy material filled in the metal lattice. Finally, lattice specimens with local damping are prepared and tested, and the experimental and simulation data are compared.

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单材料和双材料晶格结构的阻尼特性

栅格结构被广泛用于实现轻量化，而阻尼是评价栅格结构动力性能不可缺少的一个属性。本文通过实验和分析对晶格结构的阻尼性能进行了研究。制备了包括单材料晶格和双材料晶格在内的一系列晶格样品。双材料晶格是通过在金属晶格中填充环氧材料来设计的。这样既保证了双材料晶格的刚度，又实现了吸振的效果。与传统的单材料结构的比例阻尼方法不同，双材料晶格结构采用非比例阻尼模型。采用均匀化方法计算了晶格的等效复模量。本文提出了一种求原位环氧材料填充在金属晶格中的损耗因子的逆方法。最后，制作了具有局部阻尼的点阵试件并进行了测试，并对实验数据和仿真数据进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.