Numerical crashworthiness analysis of improved elliptical cross-section straight and tapered thin-walled crashing boxes

• Safak Yıldızhan ^[1] ; Umut Kumlu ^[1] ; Mustafa Atakan Akar ^[1] ; Ali Keskin ^[1] ; Omer Hukumdar ^[1]
  1. [1] Automotive Engineering, Çukurova University, Adana, Turkey
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 53, Nº. 6, 2025, págs. 4294-4311
• Idioma: inglés
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• Resumen

  • Crash boxes are one of the components that the automotive industry emphasizes and are of vital importance in the event of an accident. In this study, the crashworthiness performances of these models were examined by taking into account their geometric structures, materials, thicknesses, and many other features. This study focuses on the sections and materials of these structures, after that, the models were designed as tapered, and crash performance values such as SEA, PCF, and CLE were evaluated. While square and elliptical structures were used in the cross-sections of the models, Aluminum Alloy 6061-T6, A36 steel, and DP600 steel materials were preferred due to their positive properties. According to the research results, the highest SEA in flat crashing boxes without tapered was seen in the AA-E3 (3-elliptical cross-section models with Aluminum Alloy) combination with 24.53 kJ/kg, while the highest CLE was seen in the A36-E3 (3-elliptical cross-section models with A36 Steel) combination with 0.562 value. When the results were evaluated, 3-elliptical cross-section models were more prominent than other models in terms of both CLE and SEA. Another striking outcome of the study results was that the tapered structures created in the other part of the study had superior values than the straight structures in terms of both CLE and SEA.