Experimental and Numerical Study of Low-Velocity Impact and Compressive Behavior in ۳D-Printed ABS Honeycomb Lattice Structures

In the present work, the mechanical performance of additively manufactured honeycomb lattices under low-velocity impact and quasi-static compression is investigated experimentally and numerically. Lattice specimens with regular hexagonal topology were fabricated using Fused Deposition Modeling (FDM) with ABS thermoplastic. Compressive tests were conducted under displacement control for recording stress-strain responses, while low-velocity drop-weight impact tests were performed with a ۱-kg hemispherical impactor dropped from a height of ۳۰ cm. Finite element simulations of impact and compression were conducted in ANSYS using nonlinear static and transient dynamic analyses, respectively. Numerical models of lattices contain solid elements together with contact elements to simulate interaction with the impactor. Numerical predictions are in good correspondence with experimental force-displacement curves for impact tests, which reflect a distinct elastic-plastic response followed by local buckling and core crushing. Furthermore, a good correspondence between the simulation and the test was obtained regarding the residual dent profiles and absorbed energies. Impact behavior is compared with the load-bearing capacity, energy absorption, and failure modes under compression. Experimental results reveal that the printed honeycomb structures under both loading modes exhibit notable deformation localization controlled by face-sheet bending and core density. This paper provides a new perspective on the structural response of ۳D printing-manufactured, polymer-based lattice geometries, while previous studies have focused on metallic or composite-based honeycomb cores. The approach of dual loading improves the understanding of energy dissipation mechanisms and contributes to the development of impact-resilient lightweight components for aerospace and protective applications.

کلیدواژه ها:

Drop-weight impact ، Honeycomb lattice ، Finite element analysis ، Compression test