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Quasi-static indentation tests were conducted to characterize the mechanical behavior of honeycombs. The local failure mechanisms of honeycombs with different relative density were discussed in detail. Results showed that the spread area of tearing deformations increases with increasing relative density and that difference in the neatness of tearing edges are obvious under different indenter shapes and sizes. The effects of indenter geometry on the plateau force and energy absorption of the honeycombs were analyzed. The tear energy of the specimens was determined, and an empirical formula was proposed to describe the relationship of energy absorption with indenter geometry.

Investigation on the indentation mechanical performance of aluminum honeycombs