Experimental and finite element analyses of a 3D printed sandwich with an auxetic or non-auxetic core

IF 3.5 3区材料科学 Q1 ENGINEERING, MECHANICAL

Journal of Sandwich Structures & Materials Pub Date : 2023-01-09 DOI:10.1177/10996362231151454

Anis Hamrouni, J. Rebiere, A. El Mahi, M. Beyaoui, M. Haddar

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引用次数: 2

Abstract

This work presents the results of experimental and numerical analyses of the static properties of architectural cores and the dynamic behavior of sandwich structures made with an auxetic or non-auxetic core. Three architectural cores have been studied which are re-entrant, rectangular and hexagonal honeycombs. Each configuration was produced with four relative densities depending on the number of cells in the width of the specimens. The specimens were made with additive manufacturing technology. The material used to make the specimens was polylactic acid with flax fibers. Several tensile tests were carried out on the architectural cores to analyze and understand the influence of the topology and the density of the core on the Poisson’s ratio and the Young’s modulus of these architectural structures. Then, vibration tests were carried out on the cores and the sandwich structures. The objective was to study the influence of these structures and their densities on the dynamic properties of sandwiches. The structural Poisson’s ratio shows a sensitive behavior to the core topology and density.

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具有膨胀或非膨胀芯的3D打印三明治的实验和有限元分析

这项工作介绍了对建筑核心的静态特性和由膨胀或非膨胀核心制成的夹层结构的动态特性的实验和数值分析结果。研究了三种建筑核心，即凹入式、矩形和六边形蜂窝。根据样品宽度上的细胞数量，每种配置都具有四种相对密度。样品采用增材制造技术制成。用于制作标本的材料是含有亚麻纤维的聚乳酸。对建筑核心进行了几次拉伸试验，以分析和了解核心的拓扑结构和密度对这些建筑结构的泊松比和杨氏模量的影响。然后，对芯体和夹层结构进行了振动试验。目的是研究这些结构及其密度对三明治动态性能的影响。结构泊松比表现出对核心拓扑结构和密度的敏感行为。

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

Journal of Sandwich Structures & Materials 工程技术-材料科学：表征与测试

CiteScore

9.60

自引率

2.60%

发文量

审稿时长

7 months

期刊介绍： The Journal of Sandwich Structures and Materials is an international peer reviewed journal that provides a means of communication to fellow engineers and scientists by providing an archival record of developments in the science, technology, and professional practices of sandwich construction throughout the world. This journal is a member of the Committee on Publication Ethics (COPE).