Optimization Analysis of Variable Gradient Structures with Shape Memory Characteristics in zero Poisson's ratio Metamaterials

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Functional Materials Letters Pub Date : 2023-10-21 DOI:10.1142/s1793604723510232

Rui Zhou, Xin Huang, Fangfang Zhang

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引用次数: 0

Abstract

Mechanical metamaterials can achieve fantastic properties fabricated using artificial structural design. In this study, shape memory polymers (SMP) were combined to design variable gradient zero Poisson ratio mechanical metamaterials and 3D printing was used to fabricate complex structures. The shape memory performance of these structures was investigated by conducting simulation calculations to analyze the variations of zero Poisson’s ratio structures with different wall thicknesses, cell internal angles, and inclined wall length gradients. Through the analysis of structural dimension factors, it is concluded that the structures with smaller wall thickness and intracellular angle exhibit better shape memory performance. In order to further enhance the shape memory performance, several models with identical wall thickness and internal angles were designed to investigate the influence of inclined wall length gradients on shape memory characteristics, leading to the identification of optimal gradient structures. Finally, thermal cycling experiments were conducted on samples to validate the accuracy of the simulation results. The investigation of shape memory recovery characteristics in variable gradient zero Poisson’s ratio structures provides new insight and method for the optimization design and application of smart materials in mechanical metamaterial structures.

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零泊松比超材料中具有形状记忆特性的变梯度结构优化分析

采用人工结构设计制造的机械超材料可以获得优异的性能。在本研究中，结合形状记忆聚合物(SMP)设计可变梯度零泊松比机械超材料，并使用3D打印技术制造复杂结构。通过模拟计算，分析了零泊松比结构在不同壁厚、单元内角和倾斜壁长梯度下的形状记忆性能。通过对结构尺寸因素的分析，得出壁厚和胞内角较小的结构具有较好的形状记忆性能。为了进一步提高形状记忆性能，设计了几个相同壁厚和内角的模型，研究了倾斜壁长梯度对形状记忆特性的影响，从而确定了最优梯度结构。最后，对样品进行了热循环实验，验证了模拟结果的准确性。研究变梯度零泊松比结构的形状记忆恢复特性，为智能材料在机械超材料结构中的优化设计和应用提供了新的思路和方法。

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

Functional Materials Letters 工程技术-材料科学：综合

CiteScore

2.40

自引率

7.70%

发文量

审稿时长

1.9 months

期刊介绍： Functional Materials Letters is an international peer-reviewed scientific journal for original contributions to research on the synthesis, behavior and characterization of functional materials. The journal seeks to provide a rapid forum for the communication of novel research of high quality and with an interdisciplinary flavor. The journal is an ideal forum for communication amongst materials scientists and engineers, chemists and chemical engineers, and physicists in the dynamic fields associated with functional materials. Functional materials are designed to make use of their natural or engineered functionalities to respond to changes in electrical and magnetic fields, physical and chemical environment, etc. These design considerations are fundamentally different to those relevant for structural materials and are the focus of this journal. Functional materials play an increasingly important role in the development of the field of materials science and engineering. The scope of the journal covers theoretical and experimental studies of functional materials, characterization and new applications-related research on functional materials in macro-, micro- and nano-scale science and engineering. Among the topics covered are ferroelectric, multiferroic, ferromagnetic, magneto-optical, optoelectric, thermoelectric, energy conversion and energy storage, sustainable energy and shape memory materials.