Analysis of Mechanical Properties of Cellular Structures Under Static Tensile Loading in Standardized Specimens Manufactured by Photopolymerization
Mateusz Rudnik, Mateusz Bronis, Mehmet Sukru Adin, Nergizhan Kavak
article (Uluslararası, Hakemli) | Yazar(lar): Mateusz Rudnik, Mateusz Bronis, Mehmet Sukru Adin, Nergizhan Kavak | Yıl: 2026 | Dergi/Kurum: MATERIALS | İndeks: WOS.SCI | DOI: 10.3390/ma19142945 | Anahtar Kelimeler: cellular structures, photopolymerization, static tensile test, mechanical properties, additive manufactur
This study investigates the mechanical behavior and anisotropy of cellular structures fabricated using PolyJet Matrix (PJM) technology from RGD 720 photopolymer resin. Standard ISO 527 specimens were produced at build orientations of 0 degrees, 45 degrees, and 90 degrees to evaluate the influence of printing direction on tensile properties. Based on these results, the optimal 0 degrees orientation was selected for further analysis of cellular structures, including hexagonal, spiral, and quasi-self-similar geometries, manufactured in both unfilled and silicone-filled configurations. Static tensile tests were performed to determine load-displacement characteristics, maximum load, and deformation behavior. The results reveal a strong dependence of mechanical properties on build orientation, with the highest strength observed at 0 degrees and the lowest at 90 degrees, confirming significant material anisotropy. This behavior was further quantified using first- and second-order anisotropy coefficients derived from experimental data. The introduction of silicone filling improved load-bearing capacity, reduced variability, and promoted a more ductile failure mechanism. Among the analyzed geometries, quasi-self-similar structures exhibited the best mechanical performance, while unfilled structures showed lower strength and higher deformation. The findings demonstrate that both build orientation and structural design are critical factors in optimizing the mechanical properties of additively manufactured components and provide a basis for designing tailored cellular structures for engineering applications.