Experimental and Numerical Analysis of Energy Absorption in 3D-Printed Auxetic and Combined Lattice Structures Under Quasi-Static Loading | ||
| مهندسی مکانیک مدرس | ||
| Article 1, Volume 25, Issue 9, June 1404, Pages 555-565 PDF (2.25 M) | ||
| Document Type: پژوهشی اصیل | ||
| DOI: 10.48311/mme.2025.27793 | ||
| Authors | ||
| هادی صفی ولیلو; محمد علی صائیمی صدیق* ; موسی ساجد; وحید طاوسی | ||
| Abstract | ||
| This study presents an experimental and numerical analysis of the energy absorption (EA) performance of four types of 3D-printed polylactic acid (PLA) lattice structures under quasi-static compression. The structures included two uniform designs honeycomb (Sample 1) and re-entrant (Sample 2) and two hybrid designs (Samples 3 and 4) combining these unit cells. Experimental testing and finite element simulation revealed that the hybrid designs significantly outperformed their uniform counterparts. Between the cases, sample 4 achieved the highest specific energy absorption (SEA) of 2.41 kJ/kg, surpassing Sample 1 (1.51 kJ/kg) by 62% and Sample 2 (1.65 kJ/kg) by 33%. It also exhibited the highest total EA of 120.15 J and a mean crushing force (MCF) of 5982.96 N. Sample 3 followed closely with an SEA of 2.24 kJ/kg. Finite element analysis showed strong correlation with experimental data, with differences in SEA values across all samples ranging from 9.36% to 16.67%. The results conclusively demonstrate that strategic geometric hybridization of unit cells is a highly effective method for enhancing EA metrics in lightweight structures | ||
| Keywords | ||
| Auxetic Structures; Lattice Structures; Energy Absorption; 3D Printing; Hybrid Design | ||
| References | ||
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