|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Biological Materials Science
||Biological and Bio-inspired Flexible Armor Based on Chiton’s Girdle Scales
||Ling Li, Matthew Connors, Ahmed Hosny, Douglass Earnisse, Mason Dean, James C. Weaver, Christine Ortiz
|On-Site Speaker (Planned)
In this work, we study the ultrastructural, geometrical, and mechanical designs for the flexible biological armor based on the dorsal girdle scales from a group of mollusks called chitons. This composite armor system consists of three main components: aragonite-based scales on top, a soft tissue in the middle, and an assembly of mineralized microrods covering the bottom. By using synchrotron X-ray micro-computed tomography, we quantified the 3D geometries of scales from multiple species (families Chitonidae and Ischnochitonidae). We then demonstrate a biologically inspired flexible protective material system based on a full 3D parametric model of the scales. We explore the trade-off between mechanical protection and flexibility through direct mechanical testing of 3D-printed prototypes derived from the parametric model. Our results show that the scale curvatures result in interlocking of scales when a critical bending curvature is achieved, leading to a dramatic increase in bending stiffness after the initial low-stiffness regime.
||Planned: Supplemental Proceedings volume