Nonlinear Material Modeling for Mechanical Characterization of 3-D Printed PLA Polymer With Different Infill Densities

Abstract In additive manufacturing, also called 3-D printing, one of widely used materials is polylactide thermoplastic polymer (PLA) by means the fused deposition modeling. For weight reduction purposes, infill density an often feature in slicing for printing. We aim at investigating effect on mechanical properties structures. Therefore, we demonstrate how to prepare tensile specimens and test them a universal testing machine. Results are collected so-called digital image correlation method. As increases, from 10% 100%, nominal strain break decreases about 2.1% 1.2%, respectively. other words, material becomes more ductile decreasing PLA material, which possible justify with microstructure created density. Furthermore, discuss model fitting all presented results report that hyperelastic needed PLA. utilize Neo-Hookean, Mooney–Rivlin, Yeoh models, different densities. All three models show fairly good agreement experimental data. Neo-Hookean has advantage only parameter, increases monotonously