A numerical study on axial compression of double-walled cylinders with variable interior flat rings parameters
Sedghi M. Topa A. Tariq H.B. Kostas K. Spitas C. Liaghat G.
2026Taylor and Francis Ltd.
International Journal of Crashworthiness
2026
This study investigates the crashworthiness performance of double-walled cylindrical tubes reinforced with interior flat-ring circular ribs under axial compression. Finite element simulations were conducted to evaluate how ring number, thickness, and width influence energy absorption (EA), mean crush force (MCF), specific energy absorption (SEA), and deformation patterns. Increasing the number of rings enhances EA and SEA by hinge points for progressive folding, although excessive ring density leads to localized buckling and reduces efficiency. Optimal ring thickness improves EA by promoting progressive folding with minimal mass, whereas overly thick rings reduce the number of plastic hinges and slightly lower SEA. Increasing ring width restricts fold formation and, together with added weight, results in nearly constant SEA despite increasing MCF. These findings demonstrate the potential of interior flat rings as an effective and lightweight design strategy for improving the crashworthiness of thin‑walled energy-absorbing structures.
circular ribs , double-walled tube , Mechanical energy absorber , multi-cell cylinder , ring reinforcement
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Department of Mechanical and Aerospace Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, Kazakhstan
Department of Maritime Technology, Faculty of Ocean Engineering Technology, Universiti Malaysia Terengganu, Kuala Terengganu, Malaysia
Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Ningbo, China
School of Engineering, Computing, and Mathematics, Faculty of Technology, Design, Environment, Oxford Brookes University, Wheatley, Oxford, United Kingdom
Department of Mechanical and Aerospace Engineering
Department of Maritime Technology
Department of Mechanical
School of Engineering
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