Feng Guangshuo, Xiao Chunlu, Liu Bo, Zhang Haitao, Jia Peipei, Wang Caizheng
School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
ShenSi Lab, Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen 518110, China.
Polymers (Basel). 2024 Dec 7;16(23):3436. doi: 10.3390/polym16233436.
This study analyzes the impact mechanical response of sandwich structures with foam and wood cores through experimental and numerical methods. The aim is to determine whether a sustainable core material, such as cork wood, can serve as a reliable alternative to the commonly used Polystyrene (PS) foam core in sandwich structures. Impact experiments were conducted at varying energy levels using an INSTRON CEAST 9350 drop tower, demonstrating the superiority of sandwich structures compared to single-material alternatives. Numerical models were developed in ABAQUS, where glass fiber reinforced polymer (GFRP) composite panels were represented using solid element C3D8R and the 3D Hashin failure criteria, which were incorporated via the user subroutine VUMAT. The results indicate that the contact force of the sandwich structure with a wood core surpassed that of the foam core counterpart. In both sandwich structures, damage initially occurred at the impact point on the surface, leading to plastic deformation and damage within the core, while the composite panel on the rear surface ultimately failed. These findings provide valuable insights for designers, enabling parametric studies to select appropriate core materials that enhance the impact resistance of sandwich structures.
本研究通过实验和数值方法分析了带有泡沫和木质芯材的夹层结构的冲击力学响应。目的是确定一种可持续的芯材，如软木，是否可以作为夹层结构中常用的聚苯乙烯（PS）泡沫芯材的可靠替代品。使用英斯特朗CEAST 9350落锤塔在不同能量水平下进行了冲击实验，证明了夹层结构相对于单一材料替代品的优越性。在ABAQUS中开发了数值模型，其中玻璃纤维增强聚合物（GFRP）复合面板使用实体单元C3D8R和3D哈希因失效准则表示，并通过用户子程序VUMAT纳入。结果表明，带有木质芯材的夹层结构的接触力超过了带有泡沫芯材的对应结构。在两种夹层结构中，损伤最初都发生在表面的冲击点处，导致芯材内部的塑性变形和损伤，而后表面的复合面板最终失效。这些发现为设计师提供了有价值的见解，使他们能够进行参数研究以选择合适的芯材，从而提高夹层结构的抗冲击性。
