Axial crushing of circular multi-cell columns

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High energy absorption efficiency of thin-walled conical corrugation tubes mimicking coconut tree configuration (2018, background): “In order to increase the EA capacity of thinwalled structures, structures with multi-cells of different configurations [8-11], functionally graded thickness [12], and foam-filled section [13-16] were studied.”
Deformation, energy absorption and crushing behavior of single-, double- and multi-wall foam filled square and circular tubes (2015, background): “Based on this investigation they found that quad-cell configuration results in increased specific energy up to 30% [35].”
On the crashworthiness performance of thin-walled energy absorbers: Recent advances and future developments (2017, methodology): “The multi-cell configurations was applied to the various cross-sectional shapes including hexagonal [46], triangular [41], square [42], [90]–[94], circular [56], [95], [96] octagonal [85], and tapered [97] tubes.”
In-plane crashworthiness of bio-inspired hierarchical honeycombs (2018, background): “In general, the higher the mean crushing force Fs, the more efficient is the crashworthiness performance of a structure [32].”