|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Biological Materials Science
||H-16: The Protective Scales of Atractosteus Spatula and the Production of a Bioinspired Armor
||Vincent Sherman, Nicholas A Yaraghi, Marc A Meyers, David Kisailus
|On-Site Speaker (Planned)
The Atractosteus spatula is a fish which has existed for over 100 million years due to its scales which provide a highly resilient armor. We present an in-depth investigation of the protective function of the scales and identify features which lead to their resistance to failure. Microstructural features include crack inhibiting mineral decussation in the external ganoine layer, mineral crystals which deflect cracks in the bony region, and sawtooth ridges along the interface between the two scale layers which direct cracks away from the intrinsically weak interface. The geometry of the scales is shown to retain full coverage while conforming to physiologically required strain and flexibility in spite of minimal overlap between adjacent scales via a process in which adjacent rows of scales slide and reorient. Key features of the scale morphology are replicated in a simplified bioinspired model, and subsequently manufactured form zirconia.
||Planned: Supplemental Proceedings volume