Abstract
This study examines architectured lattices’ mechanical and morphological characteristics, leveraging additive manufacturing advancements and assessing various finite element analysis (FEA) models commonly used to predict their mechanical behavior. Various FEA material models, such as Arruda Boyce (AB), Yeoh Hyperelastic (YH), and Johnson Cook (JC), are compared to address limitations of classical models with respect to experimental verification under uniaxial compression testing of AM polyether ether ketone (PEEK) lattice samples. The study examines PEEK lattices with 50% porosity, produced via fused filament fabrication (FFF) employing triply periodic minimal surface (TPMS) structures, highlighting diamond unit cell geometry. The data for the material model was calibrated using Mcalibration software. Employing nTopology software for modeling and Abaqus Standard 2023, for computational analysis, lattice structures undergo simulation under uniaxial compression. The study primarily examines elastic and yielding regions. Upon comparing computational results of each model with experimentally obtained mechanical properties, it became evident that AB model was the most accurate in predicting mechanical properties of diamond-based lattices. This research contributes to the proper selection of a material model for predicting the mechanical properties of TPMS-based lattices, thereby advancing the understanding of lattice structures’ mechanics and offering crucial insights for future innovations in advanced materials science.
