Investigation of bending and crush behaviors in polymer lattice structures: Computational approaches and experimental evaluation

This paper aims to evaluate the manufacturing feasibility of using Fused Deposition Modeling (FDM) 3D printing for creating complex lattice structures and exploring the mechanical properties of various lattice designs, focusing on bending and compression behaviors. The comparison centers on the results of bending rigidity and energy absorption capacity, intending to be obtained from simulation and practical outcomes. The research addresses challenges related to achieving consistent mass across lattice structures due to manufacturing parameters. Discrepancies in flexural rigidity and compression behavior among the produced models trigger an exploration into the influence of design factors. The study reveals significant insights into the mechanical properties of six complex lattice structures produced through FDM 3D printing. The Tetrahedron-Cubic lattice stands out with superior bending rigidity at 15.36 N/mm, and variations in performance are attributed to layer orientation and material anisotropy. Specific energy absorption reaches its peak in the Tetrahedron-Cubic lattice at 38.54 J/g. These conclusive results provide considerations for future design and optimization. Through a focus on simplicity, intricacy, and unique geometry, the study effectively tackles manufacturing challenges and resolves discrepancies between experimental tests and simulations.