Akademik Veri Yönetim Sistemi
3. INTERNATIONAL SARAJEVO SCIENTIFIC RESEARCHES ANDINNOVATION CONGRESS” 18-19 October, BOSNIA-HERZEGOVINA, Bosanska Krupa, Bosna-Hersek, 18 - 19 Aralık 2025, ss.198-209, (Tam Metin Bildiri)
In this study, the effect of wall thickness on the compressive behavior and energy absorption capacity of 3Dprinted polylactic acid (PLA) specimens was systematically investigated. A total of four type cubic samples with dimensions of 20 × 20 × 20 mm were fabricated using a Bambu Lab A1 printer at a nozzle temperature of 220 °C and a build plate temperature of 65 °C. Four different wall thicknesses (1, 2, 4, and 6 mm) were considered, while the infill density was kept constant at 30%. Compression tests were conducted on a Raegen universal testing machine under a displacement-controlled loading rate of 1 mm/min, and the resulting force– displacement data were recorded for subsequent analysis. From these curves, absorbed energy and specific absorbed energy values were calculated to evaluate the crashworthiness performance of the samples. Furthermore, post-failure images of the specimens were examined to identify the dominant failure mechanisms as a function of wall thickness. The results revealed a clear dependence of compressive strength and energy absorption on wall thickness, with thinner-walled structures exhibiting more progressive deformation and larger displacements, whereas thicker-walled specimens showed higher peak forces but lower energy absorption efficiency per unit mass. The failure modes also shifted from ductile-like crushing and cell collapse in thin walls to brittle fracture and localized shear in thick walls. Overall, the findings demonstrate that tailoring wall thickness provides an effective design parameter to optimize the balance between load-bearing capacity and energy absorption efficiency in PLA components manufactured by fused deposition modeling.