Experimental evaluation on compression-after-impact behavior of perforated sandwich panel comprised of foam core and glass fiber reinforced epoxy hybrid facesheets

IF 3.2 3区化学 Q2 POLYMER SCIENCE

e-Polymers Pub Date : 2024-03-19 DOI:10.1515/epoly-2024-0021

Yilin Tu, Xu Li, Hongyuan Huang, Chen Chen, Gang Liu, Youping Liu, Ye Wu

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引用次数: 0

Abstract

To study the impact response and compression-after-impact (CAI) behavior of perforated sandwich panels comprised of foam core and glass fiber-reinforced epoxy hybrid facesheets, the hole diameter of specimens is changed in the fabrication via vacuum-assisted resin infusion. Furthermore, low-velocity-impact tests with various impact distances between the impact point and hole are carried out. With the help of the digital image correlation technique, CAI testing is conducted, and the strain evolution of specimens is monitored carefully. The mechanical response history, damage morphology, and compressive process are discussed in detail. The results show that the impact and CAI performance of specimens are weakened because of open holes. Compared with the non-perforated specimen, the maximum force of the specimen with a 6-mm hole and the 5-mm impact distance decreases by 41.21%, and its maximum displacement increases by 38.60%. During the CAI process, in comparison with the impact damage, more significant stress concentration and buckling around the hole are found.

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泡沫芯材和玻璃纤维增强环氧树脂混合面材组成的穿孔夹芯板压缩冲击后行为的实验评估

为了研究由泡沫夹芯和玻璃纤维增强环氧混合面层组成的穿孔夹芯板的冲击响应和冲击后压缩（CAI）行为，在制作过程中通过真空辅助树脂灌注改变了试样的孔径。此外，还进行了冲击点与孔之间不同冲击距离的低速冲击试验。在数字图像相关技术的帮助下，进行了 CAI 试验，并仔细监测了试样的应变演变。详细讨论了机械响应历史、损伤形态和压缩过程。结果表明，试样的冲击和 CAI 性能因开孔而减弱。与无孔试样相比，孔径为 6 毫米、冲击距离为 5 毫米的试样的最大力下降了 41.21%，最大位移增加了 38.60%。在 CAI 过程中，与冲击破坏相比，孔周围的应力集中和屈曲更为明显。

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来源期刊

e-Polymers 化学-高分子科学

CiteScore

5.90

自引率

10.80%

发文量

审稿时长

6.4 months

期刊介绍： e-Polymers is a strictly peer-reviewed scientific journal. The aim of e-Polymers is to publish pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome. The present Editors-in-Chief would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.