Abstract This research is geared towards the improvement of the dynamic response of the corrugated sandwiched composite structures under low-velocity impact. A novel glass fibre reinforced double-corrugated sandwiched composite (DCSC) structure was designed and was manufactured by using a vacuum assisted resin infusion (VARI) technique. The lattice core of the DCSC was formed by crosslinked composites as reinforced layers and PVC foam blocks as energy absorption components. The dynamic response of the proposed sandwiched composite structures on different locations was evaluated through low-velocity drop-weight impact tests and was compared to that of traditional single-corrugated sandwiched composite (SCSC) structures. Finally, the optical microscopy and µ-CT technique were utilized to explore failure mechanisms and damage affected zone within the specimens. The results indicated that the maximum impact load and the energy absorption capability before the structural failure of the DSCS structure were significantly improved combined with a lower indentation comparing to the traditional SCSC configuration only with a slight weight increase. No severe damage was observed given low impact energy. Fibre fracture, foam rupture and face-to-foam debonding became dominant while the energy was increased.

中文翻译：

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新型波纹夹层复合结构低速冲击响应的实验研究

摘要 本研究旨在提高波纹夹层复合结构在低速冲击下的动力响应。采用真空辅助树脂灌注（VARI）技术设计并制造了一种新型玻璃纤维增​​强双波纹夹层复合材料（DCSC）结构。DCSC 的晶格核心由作为增强层的交联复合材料和作为能量吸收组件的 PVC 泡沫块形成。通过低速落锤冲击试验评估了所提出的夹层复合材料结构在不同位置的动态响应，并与传统的单波纹夹层复合材料 (SCSC) 结构进行了比较。最后，利用光学显微镜和 μ-CT 技术来探索试样内的失效机制和损伤影响区域。结果表明，与传统的 SCSC 配置相比，DSCS 结构在结构失效前的最大冲击载荷和能量吸收能力得到显着提高，同时压痕更低，重量略有增加。由于冲击能量低，没有观察到严重损坏。当能量增加时，纤维断裂、泡沫破裂和面对泡沫脱粘成为主导。结果表明，与传统的 SCSC 配置相比，DSCS 结构在结构失效前的最大冲击载荷和能量吸收能力得到显着提高，同时压痕更低，重量略有增加。由于冲击能量低，没有观察到严重损坏。当能量增加时，纤维断裂、泡沫破裂和面对泡沫脱粘成为主导。结果表明，与传统的 SCSC 配置相比，DSCS 结构在结构失效前的最大冲击载荷和能量吸收能力得到显着提高，同时压痕更低，重量略有增加。由于冲击能量低，没有观察到严重损坏。当能量增加时，纤维断裂、泡沫破裂和面对泡沫脱粘成为主导。