Quasi-static compression and fatigue performance of hybrid plate lattice metamaterial structures

作者：Dongquan Wu, Enze Wu, Lianpeng Lu, Wenjie Wu, Zhao Xu, Dizhi Guo, Zhiqiang Zhang · 发表于：Mechanics of Advanced Materials and Structures · 年份：2025 · DOI：10.1080/15376494.2025.2502133 · 被引用次数：3 · 研究领域：Cellular and Composite Structures、Fluid Dynamics Simulations and Interactions、Structural Analysis and Optimization

In this study, three hybrid lattice metamaterial structures based on face-centered cubic (FCC), body-centered cubic (BCC), and simple cubic (SC) lattices, namely FS, BS, and FBS, were designed and analyzed. Using finite element simulations and experimental studies with 3D-printed polylactic acid (PLA) via fused deposition modeling (FDM), the quasi-static compression and fatigue mechanical properties of these structures were investigated. Digital image correlation (DIC) and finite element method were employed to study deformation characteristics under quasi-static compression. Compression-compression fatigue tests were also conducted, and comparative analyses were made on the fatigue performance and deformation mechanisms of the structures. It was showed that FBS exhibited superior specific energy absorption, compressive strength, and minimal ultimate strain at a 90 kN load, indicating optimal quasi-static compression properties. For static compression, the deformation of the subunits was consistent, with stable structural deformation. The correlation between simulation and experimental results was validated. For fatigue performance, FBS demonstrated the most stable deformation characteristics, the slowest rate of change in the cyclic stress-strain hysteresis curve, and the highest fatigue life under the same cyclic peak stress, confirming its optimal fatigue performance. The theoretical formulas related to fatigue damage were discussed, and the future directions for improving...