| Autor: |
Tongthong, Sittha, Petthai, Tanapot, Jongpradist, Pattaramon, Ruangjirakit, Kitchanon, Kongwat, Suphanut |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3086 Issue 1, p1-7, 7p |
| Abstrakt: |
Crash box is the main component of the crumple zone to absorb impact energy. Therefore, it requires the highest energy absorbing performance under axial and oblique impact loads at different angles. This study presents an optimal solution for the hexagonal crash box design with a functionally graded thickness (FGT) honeycomb filler. The crash box finite element model was firstly validated with the experimental impact test. Layer sensitivity analysis of the FGT model showed that using 41 layers along the crash box axis was sufficient to obtain accurate results. The multi-objective optimization was adopted to obtain the optimal grading exponents of the FGT crash box that maximize specific energy absorption (SEA) and minimize initial peak crash force (IPF) at the 0-, 10-, 20-, and 30-degree impact angles based on the Particle Swarm Optimization technique. The optimal FGT design could decrease the IPF in all design cases compared to the crash with uniform thickness (UT), while the SEA of the FGT crash box demonstrated better crashworthiness at the 30-degree impact angle. Furthermore, the FGT crash box exhibited the progressive failure mode at the oblique impact angles, which resulted in higher energy absorbing capability than the bending failure mode observed in the UT crash box. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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