This experimental study was conducted to investigate the behavior of hybrid composite sandwich panels with superelastic shape memory alloy (SMA) wires under low velocity impact (LVI). Square‐shaped sandwich panels were made few of a foam core and hybrid composite structures with carbon fiber and glass fiber, in which prestrained superelastic SMA wires were embedded between the layers. The sandwich panels had symmetrical and asymmetrical lay‐ups and SMA wires were placed between the layers with different states. LVI tests were performed by drop weight impact testing machine. Moreover, damaged areas of the panels were estimated using thermography. The experimental results showed that the impact performance of the panels improved after embedding SMA wires. The presence of the SMA within the composite sandwich structure prevented the full perforation of the samples and reduced the internal delamination area. The utilization of SMA wires embedded in front face sheet, which is subject to the direct impact, is more effective than the utilization of wire in the back face layer. It was also found that increasing the layers of the back face and asymmetrication of the structure were more effective than the use of SMA wires in the symmetric structure in improving the panel impact resistance.

中文翻译：

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低速冲击下复合复合面板与形状记忆合金丝复合夹芯板的实验研究

进行此实验研究以研究低速冲击（LVI）下具有超弹性形状记忆合金（SMA）线的混合复合夹芯板的行为。方形夹心板很少由泡沫芯和碳纤维与玻璃纤维的混合复合结构制成，其中预应力超弹性SMA线嵌入层之间。夹心板具有对称和不对称的叠层，SMA线材以不同状态放置在层之间。LVI测试是通过落锤冲击试验机进行的。此外，使用热成像法估计了面板的损坏区域。实验结果表明，嵌入SMA丝后，面板的冲击性能得到改善。复合材料夹层结构内SMA的存在阻止了样品的完整穿孔，并减少了内部分层区域。嵌入正面面板中的SMA线的使用会受到直接冲击，比背面层中的线的使用更为有效。还发现增加背面的层数和结构的不对称性比在对称结构中使用SMA线材在改善面板抗冲击性方面更有效。