硅粉增强的泡沫铝/环氧树脂互穿相复合材料的抗压、抗弯特性和损伤模式

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
Mingming Su, Zhiming Zhou, Han Wang
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引用次数: 0

摘要

互穿相复合材料(IPCs)能综合各组分的优点,具有良好的应用前景。本研究将开孔泡沫铝(AF)和环氧树脂(EP)在三维空间中结合,制备了互穿相复合材料。在 EP 中添加了不同含量的二氧化硅粉末(SP、80、100、120 和 140 wt%),以改善 IPC 的抗压和三点弯曲性能。在弯曲试验中,应用声发射(AE)来跟踪样品的弯曲变形,并应用 k-means 聚类算法来识别损伤模式。随着 SP 含量的增加,IPC 的抗压和弯曲性能先增大后减小,当 SP 含量为 100 wt% 时达到最大值,抗压屈服强度为 74.6 MPa,弯曲峰值载荷为 1.96 kN。性能下降的主要原因是 SP 在界面上的分布导致了 AF/EP 脱粘。X 型剪切带和 EP/AF 脱粘分别出现在 AF 和 IPC 的压缩失效中。声发射聚类结果表明,在弯曲载荷下,AF 出现基体塑性变形(60-200 kHz)和断裂破坏(230-340 kHz)模式,而 IPC 出现 EP/AF 脱胶(60-120 kHz)、EP 破坏(120-230 kHz)和泡沫基体塑性变形(230-250 kHz)模式。首先使用声发射监测泡沫和 IPC 的弯曲。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Compressive and flexural properties and damage modes of aluminum foam/epoxy resin interpenetrating phase composites reinforced by silica powder

Compressive and flexural properties and damage modes of aluminum foam/epoxy resin interpenetrating phase composites reinforced by silica powder
Interpenetrating phase composites (IPCs) can combine the advantages of each component and have a good application prospect. IPCs were prepared by combining open‐cell aluminum foam (AF) and epoxy resin (EP) in three‐dimensional space in this study. Different contents of silica powder (SP, 80, 100, 120, and 140 wt%) were added to EP to improve the compressive and three‐point bending properties of IPCs. In the bending test, acoustic emission (AE) was applied to track the bending deformation of the samples, and k‐means clustering algorithm was applied to identify the damage modes. The compressive and bending properties of IPCs increased first and then decreased with the increase of SP content, and reached the maximum when the SP content was 100 wt%, with a compressive yield strength of 74.6 MPa and a bending peak load of 1.96 kN. The performance degradation was mainly attributed to the AF/EP debonding due to SP distribution at the interface. The X‐type shear band and EP/AF debonding appeared in compression failures of AF and IPCs, respectively. The AE clustering results showed that under bending load, plastic deformation of matrix (60–200 kHz) and fracture failure (230–340 kHz) modes appeared in AF, while EP/AF debonding (60–120 kHz), EP failure (120–230 kHz) and plastic deformation of foam matrix (230–250 kHz) modes appeared in IPCs.Highlights Silica powder was added to improve compressive and bending properties of IPCs. Acoustic emission was used to monitor bending of foam and IPCs firstly. k‐means clustering was used to identify and classify bending damage patterns.
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来源期刊
Polymer Composites
Polymer Composites 工程技术-材料科学:复合
CiteScore
7.50
自引率
32.70%
发文量
673
审稿时长
3.1 months
期刊介绍: Polymer Composites is the engineering and scientific journal serving the fields of reinforced plastics and polymer composites including research, production, processing, and applications. PC brings you the details of developments in this rapidly expanding area of technology long before they are commercial realities.
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