The Influence of Infill Density on the Impact Behavior of 3D‐Printed PLA Parts

The study focuses on the experimental determination of the impact behavior of PLA components manufactured through additive manufacturing, where the infill density of each tested specimen is varied. The evaluation of the impact energy absorbed by each configuration provides relevant insights into the influence of internal structure on mechanical performance, thus contributing to the optimization of manufacturing parameters for the development of components that must respect the efficiency in terms of mechanical strength and material use. In this paper, the authors investigate the influence of internal structure on impact strength by proposing four different infill density configurations for 3D‐printed PLA specimens: 30%, 50%, 80%, and 100% infill. These variations were selected to provide a comprehensive understanding of how internal material volume increase affects the mechanical performances under impact loading. By systematically analyzing the absorbed impact energy for each configuration, the study aims to establish correlations between infill percentage and structural integrity, offering valuable insights for optimizing additive manufacturing parameters.