Fracture toughness evaluation of zeolite/polyurethane-filled woven panels

Q2 Materials Science

Engineering Solid Mechanics Pub Date : 2023-01-01 DOI:10.5267/j.esm.2023.1.005

H. Safari, M. Karevan, H. Nahvi

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引用次数: 0

Abstract

Recently, due to their extraordinary strength-to-weight ratio and multi-functional applications, three-dimensional woven fiberglass sandwich structures have become a well-received topic by researchers and manufacturers. Nevertheless, using light and foam absorber materials as injected fillers within sandwich cores can improve their overall mechanical performance and, in particular, their fracture toughness behavior. This study evaluates the fracture toughness of three-dimensional woven fiberglass sandwich panels filled with natural nano-structured zeolite/polyurethane foams injected between their parallel panels. The Single-Edge Notched Bend test was carried out to understand the effect of the injected foam on the mode-I fracture toughness response. It is demonstrated that the polyurethane foam reinforced with natural nano-structured zeolite particles highly improved the fracture toughness of sandwich core panels. It was found that the presence of vertical glass yarns within the sandwich panel gallery resulted in a significantly higher toughness compared with typical sandwich panels of no reinforcing vertical columns confirmed by the crack propagation and observed failure mode. The SEM and EDX analyses were used to better understand the correlations amongst the specimen morphology, the cracks behavior, and the toughness exhibited by the fabricated specimens.

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沸石/聚氨酯填充编织板断裂韧性评价

近年来，三维编织玻璃纤维夹层结构由于其优异的强度重量比和多功能应用，已成为研究人员和制造商的热门课题。然而，使用轻质和泡沫吸收材料作为夹层岩心的注入填料可以改善其整体机械性能，特别是其断裂韧性。本研究对三维编织玻璃纤维夹层板的断裂韧性进行了评估，夹层板之间注入天然纳米结构沸石/聚氨酯泡沫。通过单棱缺口弯曲试验了解注入泡沫对i型断裂韧性响应的影响。结果表明，天然纳米结构沸石颗粒增强的聚氨酯泡沫材料可显著提高夹层芯板的断裂韧性。通过裂纹扩展和观察到的破坏模式，发现夹层板廊内垂直玻璃纱的存在使夹层板的韧性明显高于典型的无竖向加固夹层板。SEM和EDX分析可以更好地了解试样形貌、裂纹行为和韧性之间的关系。

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

Engineering Solid Mechanics Materials Science-Metals and Alloys

CiteScore

3.00

自引率

0.00%

发文量

期刊介绍： Engineering Solid Mechanics (ESM) is an online international journal for publishing high quality peer reviewed papers in the field of theoretical and applied solid mechanics. The primary focus is to exchange ideas about investigating behavior and properties of engineering materials (such as metals, composites, ceramics, polymers, FGMs, rocks and concretes, asphalt mixtures, bio and nano materials) and their mechanical characterization (including strength and deformation behavior, fatigue and fracture, stress measurements, etc.) through experimental, theoretical and numerical research studies. Researchers and practitioners (from deferent areas such as mechanical and manufacturing, aerospace, railway, bio-mechanics, civil and mining, materials and metallurgy, oil, gas and petroleum industries, pipeline, marine and offshore sectors) are encouraged to submit their original, unpublished contributions.