Influence of Freezing Time on Hardness and Impact Resistance of 3D-Printed PLA+
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Tarih
2025
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Dergi Başlığı
Dergi ISSN
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Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This preliminary study investigates the effect of freezing duration on the impact and strength performance of 3D-printed PLA+ specimens produced with 50% and 100% infill densities in a honeycomb pattern using the FDM technique. Samples were stored at -80 °C for varying time intervals (up to 72 hours), and their dimensional changes, hardness, and impact resistance were evaluated. Results indicate that prolonged exposure to sub-zero temperatures caused a slight reduction in specimen diameter, likely due to material shrinkage. Conversely, hardness values increased with freezing time, reaching a maximum Shore D value of 85.78 for fully solid samples. Impact testing revealed that 100% infill density specimens absorbed more energy than 50% counterparts, with the highest impact strength (24.53 kJ/m²) observed after 72 hours of freezing. Visual analysis showed no significant variation in crack trajectory with freezing duration. Overall, the findings suggest that PLA+ retains and even improves its mechanical robustness under cryogenic conditions, making it a promising candidate for applications requiring durability in extreme environments.
Açıklama
Anahtar Kelimeler
Mühendislik, Makine, Malzeme Bilimleri, Kompozitler
Kaynak
Düzce Üniversitesi Bilim ve Teknoloji Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
13
Sayı
4
