| Finite Element Simulation of Lattice Structures Embedded in Sandwich Panels for Application in Automotive Bumper Systems |
| کد مقاله : 1029-ICME (R1) |
| نویسندگان |
|
هادی صفی ولیلو *، مهدی رشیدی نوشهر، محمد علی صائیمی صدیق، موسی ساجد دانشگاه شهید مدنی آذربایجان |
| چکیده مقاله |
| This study investigates the application of lattice structures with auxetic properties as cores in sandwich panels to enhance the performance of automotive bumper systems. Two lattice geometries—hexagonal honeycomb and anti-tetrachiral—were designed using SolidWorks 2023 and fabricated from polylactic acid (PLA), while aluminum face sheets were employed for the sandwich panels. Mechanical properties of PLA were extracted through ASTM D638 tensile testing, fitted to a Drucker–Prager model, and incorporated into finite element simulations conducted in Abaqus 2022. The Johnson–Cook model was applied to define the mechanical behavior of aluminum sheets. Three-point bending and compression tests were simulated to evaluate energy absorption, using steel cylindrical jaws under controlled boundary conditions. Force–displacement curves and deformation patterns revealed significant differences among the three structural models. The hexagonal lattice exhibited the lowest performance, with absorbed energy (EA) of 7065 J and specific energy absorption (SEA) of 34 J/kg. The anti-tetrachiral lattice showed improved results, achieving EA of 24,713 J and SEA of 93 J/kg. In contrast, the sandwich panel demonstrated remarkable superiority, with EA = 1,113,057 J and SEA = 2869 J/kg, highlighting its outstanding energy absorption capacity and mechanical efficiency. Comparative analysis confirmed that while anti-tetrachiral lattices outperform hexagonal ones, both remain far behind the sandwich panel. These findings establish the sandwich panel with an optimized lattice core as the most effective design for applications requiring maximum energy absorption and structural resilience. |
| کلیدواژه ها |
| Metamaterials, Sandwich panel, Auxetic structures, Energy absorbing, 3PB |
| وضعیت: پذیرفته شده برای ارسال فایل های ارائه پوستر |
