Akademik Veri Yönetim Sistemi
5th INTERNATIONAL PARIS CONGRESS ON APPLIED SCIENCES, Paris, Fransa, 4 - 08 Ağustos 2025, ss.21-37, (Tam Metin Bildiri)
Nowadays, in order to increase structural safety in the automotive industry, studies to improve
the impact energy absorption capacity of thin-walled structures have gained great momentum.
In parallel with this, studies in this field aim to improve the energy absorption performance by
optimizing the geometrical properties of structural elements used in crash boxes. In this study,
the crushing behaviour and energy absorption capabilities of thin-walled structures with various
cross-section geometries under axial impact loading are investigated numerically. Three
different configurations are modelled to determine the contribution of cross-section and
material types in the impact absorption of thin-walled structures. Simulations were carried out
using the finite element method (FEM) dynamic collision scenario. The crash scenarios for each
configuration were analyzed under identical conditions using two different materials (DP-600
and AL6061-T6) and constant thickness (1 mm). Dynamic crash simulations were compared
with respect to Specific Energy Absorption (SEA), Total Energy (EA), Peak Crushing Force
(PCF), and Mean Crushing Force (MCF) values to investigate the effects of material types and
the crushing behaviour of crash boxes on geometric cross-sections. According to the data
obtained in the study, the highest SEA value was found to be 33.89 kJ/kg in the AL-S2
combination, while the highest CLE value of 0.428 was found in the AL-S2 combination. When
compared in square models, the AL-S2 combination had 2.61 times higher result than the ALS
combination in terms of SEA value. When evaluated in terms of CLE value, the AL-S2
combination had 2.39 times higher results compared to the AL-S combination. When the
research results were evaluated, flower-section combinations stood out compared to squaresection
combinations in terms of both SEA and CLE values. The results of the analyses showed
that cross-section configurations and material types play a positive role in the crashworthiness
characteristics of thin-walled structures.