|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Advanced Biomaterials
||Pangolin Armor: Overlapping, Structure, and Mechanical Properties of the Keratinous Scales
||Wen Yang, Bin Wang, Vincent Sherman, Marc Meyers
|On-Site Speaker (Planned)
The pangolin has a flexible dermal armor consisting of overlapping keratinous scales. When predators threaten pangolins, they roll up into a ball exposing hard, sharp-edged scales. These tough yet flexible scales are made of a hard nail-like material. The scales have a cuticle of several layers of loosely attached flattened keratinized cells, while the interior structure exhibits three regions distinguished by the geometry and orientations of the keratinized cells, which form densely packed lamellae; each one corresponds to one layer of cells. A nano-scale suture structure, observed for the first time, outlines cell membranes and leads to an interlocking interface between lamellae, thus enhancing the bonding and shear resistance. Based on the interesting hierarchical structure, the mechanical behavior as well as the toughening mechanisms were investigated.
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