International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

As additive manufacturing (AM) technologies continue to gain traction across various industries, researchers have increasingly focused on optimizing the mechanical performance of polymer parts produced through material extrusion (MEX). Among the manufacturing parameters involved, infill pattern and density stand out as key factors that directly determine the mechanical behavior and energy absorption capacity of printed components. This study examines how different infill density gradients influence energy absorption, focusing specifically on samples built from polylactic acid (PLA) filament using a Triply Periodic Minimal Surface (TPMS-D) diamond pattern. TPMS-based infill patterns were selected for this study due to their potential to offer superior mechanical properties and energy absorption capacity compared to conventional two-dimensional infill patterns. The samples were subjected to quasi-static compression tests, from which stress-strain curves were obtained and energy absorption properties were calculated. The findings of this study are expected to inform the optimization of infill pattern and density parameters for energy-absorption applications, while also offering practical guidance for designing lightweight structures capable of withstanding high-energy impacts.