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Bending Behavior of Empty and Foam-Filled Aluminum Tubes with Different Cross-Sections

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Abstract

In this paper, the energy absorption mechanism of empty and foam-filled aluminum tubes with different cross-sections (circular, square and elliptic) under bending load is investigated numerically. The load-displacement curves of the present simulations are in very good agreement with those of published experimental data. Here, the existing analytical formulations are reviewed and compared with experimental results. In addition, the effects of different cross-sections and wall thicknesses on the energy absorption capacity and specific energy absorption of these tubes are fully investigated. The results indicate that the energy absorption of an elliptic foam-filled tube with 1.5 mm and 2 mm thicknesses increases about 45% and 73% in comparison with a square one, respectively.

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Abbreviations

D :

tube width

L :

tube length

P Max :

maximum load peak

υ P :

plastic coefficient of contraction

Y :

yield stress

α :

shape factor

ε D :

compaction strain

µ :

coefficient of friction

ρf0:

density of the base material

σ 0.2 :

yield stress

σ ij :

principal shell stresses

σ e :

effective Von Mises stress

σ p :

plateau stress

d :

impactor diameter

P mean :

mean crash load

T :

tube thickness

V (t):

velocity field

η :

crash load efficiency

α 2 :

foam material parameters

ε ij :

principal shell strains

ρf:

foam density

σ fail :

tensile failure stress

σ u :

ultimate stress

σ̂ :

equivalent stress

σ m :

mean stress

Φ :

yield stress function

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Authors and Affiliations

  1. School of Automotive Engineering, Iran University of Science and Technology, Tehran, Iran

    M. H. Shojaeifard, R. Talebitooti & M. Mehdikhanlo

  2. Faculty of Aerospace Engineering, Aeronautical University of Science and Technology, Tehran, Iran

    H. R. Zarei

Authors
  1. M. H. Shojaeifard
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  2. H. R. Zarei
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  3. R. Talebitooti
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  4. M. Mehdikhanlo
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Correspondence to H. R. Zarei.

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Shojaeifard, M.H., Zarei, H.R., Talebitooti, R. et al. Bending Behavior of Empty and Foam-Filled Aluminum Tubes with Different Cross-Sections. Acta Mech. Solida Sin. 25, 616–626 (2012). https://doi.org/10.1016/S0894-9166(12)60057-3

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  • DOI: https://doi.org/10.1016/S0894-9166(12)60057-3

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