Güden, MustafaKavi, Halit2015-12-172015-12-172006Güden, M., and Kavi, H. (2006). Quasi-static axial compression behavior of constraint hexagonal and square-packed empty and aluminum foam-filled aluminum multi-tubes. Thin-Walled Structures, 44(7), 739-750. doi:10.1016/j.tws.2006.07.0030263-8231http://doi.org/10.1016/j.tws.2006.07.003https://hdl.handle.net/11147/4404The axial crushing behavior of empty and Al close-cell foam-filled single Al tubes and Al multi-tube designs (hexagonal and square) were investigated through quasi-static compression testing. The effects of foam filling on the deformation mode and the crushing and average crushing loads of single tubes and multi-tube designs were determined. The foam filling was found to shift the deformation mode of empty single tube and empty multi-tube designs from diamond into concertina. In multi-tube designs the constraint effects and the frictional forces were found to increase the average crushing loads over those of single tubes. It was also found that foam filling induced a higher strengthening coefficient in multi-tube than single tubes. Although foam filling increased the energy absorption in single tubes and multi-tube designs, it was not effective in increasing the specific absorbed energy over that of the empty tubes. However, multi-tube designs were found to be energetically more effective than single tubes at similar foam-filler densities, proving a higher interaction effect in multi-tube designs.eninfo:eu-repo/semantics/openAccessCircular aluminum tubesFoam fillingAxial crushingMulti-tubesArticle2-s2.0-3374943641610.1016/j.tws.2006.07.00310.1016/j.tws.2006.07.00310.1016/j.tws.2006.07.003