Experimental and numerical analysis of in-plane compression properties for hierarchical reentrant honeycomb structures

作者：Dongquan Wu, Zhao Xu, Zhuo Yuan, Yupeng Li, Dinghe Li, Zhiqiang Zhang · 发表于：Mechanics of Advanced Materials and Structures · 年份：2024 · DOI：10.1080/15376494.2024.2442501 · 被引用次数：13 · 研究领域：Cellular and Composite Structures、Automotive and Human Injury Biomechanics、Mechanical Failure Analysis and Simulation

This study conducted an in-depth comparison of the in-plane compression performance of three newly designed hierarchical reentrant honeycomb structures using 3D-printed PLA materials. The analysis combined finite element simulations with physical experiments based on fused deposition modeling (FDM). Relative density formulas were derived for each substructure, which included units with positive, negative, and zero Poisson’s ratios. The results indicate that, under both in-plane compression modes, the hierarchical reentrant honeycomb structure (CH), composed of classic hexagonal unit cells, demonstrates the highest load-bearing capacity and energy absorption characteristics. Furthermore, the orientation of the unit cells has a negligible impact on the overall mechanical performance of the structure. The energy absorption capability of the hierarchical structure also exceeds that of traditional honeycombs under in-plane compression.