Pomelo fruits have a mass of one to two kilograms, but are able to withstand impact forces resulting from falls of over 10 meters. The fruit’s impact resistance is mainly due to the hierarchical structuring of the peel, which is made up of a graded, fiber-reinforced foam. The new aluminum hybrid is the product of a bio-inspired approach, combining metals with different mechanical properties that reflect these naturally occurring structures and mimic the strength of the pomelo peel.
To make use of the pomelo’s ability to absorb impact energy, the “block mold casting” process was modified, and the pomelo foam’s strut composition was transferred to a metal hybrid. This hybrid consists of highly ductile pure aluminum in the center and a high strength aluminum-silicon alloy in the outer shell.
Read more at: Phys.org