| 1. |
Rogala M.♦, Ferdynus M.♦, Kopeć M., The effect of multilevel spherical triggers on the crashworthiness capacity of thin-walled structures,
Aerospace Science and Technology, ISSN: 1270-9638, DOI: 10.1016/j.ast.2025.110299, Vol.163, No.110299, pp.1-18, 2025 Abstract:
Progressive dynamic crushing remains a significant focus in contemporary research aimed at developing and optimizing energy-absorbing structures. This study investigates thin-walled passive energy absorbers featuring multi-level crush initiators in the form of spherical embossments. The experimental setup involved aluminum columns subjected to an impact energy of 1700 J. These columns were designed with varying numbers of embossment levels. Key parameters of the spherical embossments included diameters ranging from 12 to 36 mm and depths from 1.2 to 4.8 mm. Dynamic impact tests were conducted using an Instron Ceast 9350 HES drop tower, with deformation behavior captured via a Phantom Miro M310 high-speed camera. Complementary finite element analyses were also performed to obtain force-displacement responses and crushing efficiency indicators, enabling a comparative assessment of structural performance based on different crush initiator configurations. The results demonstrate that spherical embossments enhance the stability of the crushing process by reducing the peak crushing force. Furthermore, incorporating additional embossment levels increases the mean crushing force and improves the overall energy absorption efficiency of the passive energy absorber. Keywords:
Multi-level trigger , Spherical embossment, Crashworthiness Affiliations:
| Rogala M. | - | other affiliation | | Ferdynus M. | - | other affiliation | | Kopeć M. | - | IPPT PAN |
|  |
