原位乙烯-醋酸乙烯酯（EVA）泡沫填充铝蜂窝夹层结构的面外压缩行为

The Out-Of-Plane Compression Behavior of In Situ Ethylene Vinyl Acetate (EVA)-Foam-Filled Aluminum Honeycomb Sandwich Structures.

作者信息

Atalay Kalsen Tuğba Selcen, Karadağ Hakan Burak, Eker Yasin Ramazan

机构信息

Department of Metallurgical and Materials Engineering, Köyceğiz Campus, Necmettin Erbakan University, Meram, Konya 42090, Turkey.

Research and Application Center of Science and Technology (BİTAM), Köyceğiz Campus, Necmettin Erbakan University, Meram, Konya 42090, Turkey.

出版信息

Materials (Basel). 2023 Jul 30;16(15):5350. doi: 10.3390/ma16155350.

DOI:10.3390/ma16155350

PMID:37570054

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10420142/

Abstract

In this study, the mechanical behavior of aluminum honeycomb (AHC) sandwich structures filled with ethylene vinyl acetate copolymer (EVA) foam in situ under out-of-plane compression loading was investigated experimentally. Both non-filled and EVA-foam-filled sandwich specimens with three different AHC core cell sizes (5.20, 6.78, and 8.66 mm) were studied to correlate the foam-filling effect with a key structural parameter. The results showed that compression characteristic properties such as peak stress, plateau stress, and absorbed energy per unit volume of the sandwich structure increased with EVA foam filling. The structure showed high recoverability when the compression loading was removed due to the viscoelastic nature of EVA foam. Cored EVA sandwich with 8.66 mm AHC cell size was recovered at 44% of the original thickness. This result promises groundbreaking applications such as impact-resistant and self-healing structures. The microstructures were also observed using scanning electron microscopy (SEM) to investigate the failure and the recoverability mechanisms.

摘要

在本研究中，对平面外压缩载荷作用下原位填充乙烯 - 醋酸乙烯酯共聚物（EVA）泡沫的铝蜂窝（AHC）夹层结构的力学行为进行了实验研究。研究了具有三种不同AHC芯格尺寸（5.20、6.78和8.66毫米）的未填充和EVA泡沫填充夹层试样，以关联泡沫填充效果与关键结构参数。结果表明，夹层结构的压缩特性，如峰值应力、平台应力和单位体积吸收能量，随着EVA泡沫填充而增加。由于EVA泡沫的粘弹性，当去除压缩载荷时，该结构显示出高恢复性。具有8.66毫米AHC芯格尺寸的带芯EVA夹层恢复到原始厚度的44%。这一结果为诸如抗冲击和自愈结构等开创性应用带来了希望。还使用扫描电子显微镜（SEM）观察微观结构，以研究失效和恢复机制。