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Energy Absorption Characteristics of AA7075-T6 Tube Filled with Aluminum Foam

  • S. Vignesh
  • C. Lakshmana Rao
  • Simhachalam Bade
Conference paper

Abstract

In this article, energy absorption and dynamic compressive stress–strain behavior of aluminum foam-filled and empty tube of aluminum alloy AA7075-T6 were investigated using a split Hopkinson pressure bar (SHPB) technique. Both quasi-static and dynamic compression tests were conducted on closed-cell aluminum foam specimens having a relative density of 0.16. The experimental results showed that the plateau stress and energy absorption of foam-filled aluminum alloy AA7075-T6 tube specimen increase with increase in strain rate. The load-deformation characteristics, failure modes, and energy absorption capacity of different structures under dynamic loading were investigated. At higher strain rates, the energy absorption capacity of foam-filled aluminum alloy tubes was found to be increased, which is useful for crashworthy applications.

Keywords

SHPB Aluminum alloy Energy absorption Crashworthiness ALPORAS Crushable foam 

Nomenclature

ρ*

Density of closed-cell aluminum foam

\(\sigma_{\text{pl}}\)

Plateau stress

\(\varepsilon_{D}\)

Densification strain

W

Energy absorption

Ai

Cross-sectional area of incident bar

At

Cross-sectional area of transmitted bar

C0

Longitudinal wave speed

Notes

Acknowledgments

The authors acknowledge Professor P. Venkitanarayanan from Indian Institute of Technology, Kanpur for valuable discussions and collaboration.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • S. Vignesh
    • 1
  • C. Lakshmana Rao
    • 1
  • Simhachalam Bade
    • 1
    • 2
  1. 1.Department of Applied MechanicsIndian Institute of Technology MadrasChennaiIndia
  2. 2.Corporate Technology CentreTube Investment of India Ltd.Avadi, ChennaiIndia

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