Energy Absorption Characteristics of AA7075-T6 Tube Filled with Aluminum Foam
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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.
KeywordsSHPB Aluminum alloy Energy absorption Crashworthiness ALPORAS Crushable foam
Density of closed-cell aluminum foam
Cross-sectional area of incident bar
Cross-sectional area of transmitted bar
Longitudinal wave speed
The authors acknowledge Professor P. Venkitanarayanan from Indian Institute of Technology, Kanpur for valuable discussions and collaboration.
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