مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

Experimental and Numerical Analysis of Energy Absorption in 3D-Printed Auxetic and Combined Lattice Structures Under Quasi-Static Loading

نوع مقاله : پژوهشی اصیل

نویسندگان
هادی صفی ولیلو
محمد علی صائیمی صدیق
موسی ساجد
وحید طاوسی
10.48311/mme.2025.27793
چکیده
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
کلیدواژه‌ها
Auxetic Structures
Lattice Structures
Energy Absorption
3D Printing
Hybrid Design

موضوعات

عنوان مقاله English

Experimental and Numerical Analysis of Energy Absorption in 3D-Printed Auxetic and Combined Lattice Structures Under Quasi-Static Loading

نویسندگان English

Hadi Safi Valilu
Mohammad Ali Saeimi Sadigh
Moosa Sajed
Vahid Tavousi
چکیده English

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.

کلیدواژه‌ها English

Auxetic Structures
Lattice Structures
Energy Absorption
3D Printing
Hybrid Design
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مهندسی مکانیک مدرس
دوره 25، شماره 9
شهریور 1404
صفحه 555-565