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Effect of combined multi-cell columns and exterior stiffeners on energy absorption parameters of thin-walled tubes under axial load

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Abstract

In this paper, the energy absorption parameters are investigated for new forms of thin-walled energy absorbers. The effect of adding stiffeners to the outer tube wall, as well as the multi-cell effect of the structure, was investigated both in a separate and simultaneous manner in a tube with the square section. This design has not been investigated in previous studies, and it stimulates innovation in its own right. Such designs can significantly increase the energy absorption of the structure with the least change in the initial geometry and the lowest costs. The nonlinear explicit finite element method was used to simulate the crushing process in the tubes. The numerical simulation results were validated with the results of experimental tests, and a good agreement was observed. Finally, the parameters such as specific energy absorption, crush force efficiency, initial peak force, and mean crush force were calculated and analyzed. The results showed that the proper combination of stiffeners in the middle sides of the tube wall and the creation of a multi-cell column made it possible to improve the specific energy absorption up to 89% and crush force efficiency up to 52% compared with the reference tube, which is a significant improvement. Also, while comparing some of the results, it was analyzed why sometimes inserting stiffeners on the outer wall of tubes is better than the multi-cell method to increase the SEA of structure.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, Iran

    Ali Akhavan Attar & S. Chahardoli

  2. Department of Mechanical Engineering, Faculty of Engineering, Malayer University, Malayer, Iran

    S. A. Rasouli

Authors
  1. Ali Akhavan Attar
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  2. S. A. Rasouli
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  3. S. Chahardoli
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Correspondence to S. A. Rasouli.

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Technical editor: João Marciano Laredo dos Reis.

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Akhavan Attar, A., Rasouli, S.A. & Chahardoli, S. Effect of combined multi-cell columns and exterior stiffeners on energy absorption parameters of thin-walled tubes under axial load. J Braz. Soc. Mech. Sci. Eng. 42, 463 (2020). https://doi.org/10.1007/s40430-020-02531-y

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  • DOI: https://doi.org/10.1007/s40430-020-02531-y

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