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arxiv: 1604.07798 · v2 · pith:LVU4AI7Inew · submitted 2016-04-26 · ❄️ cond-mat.mtrl-sci

A Sinusoidally-Architected Helicoidal Biocomposite

Nicholas A. Yaraghi , Nicol\'as Guar\'in-Zapata , Lessa K. Grunenfelder , Eric Hintsala , Sanjit Bhowmick , Jon M. Hiller , Mark Betts , Edward L. Principe
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Jae-Young Jung Leigh Sheppard Richard Wuhrer Joanna McKittrick Pablo D. Zavattieri David Kisailus
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classification ❄️ cond-mat.mtrl-sci
keywords helicoidalidentifiedabsorptionalpha-chitinapatiteappendagearchitecturebiocomposite
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A fibrous herringbone-modified helicoidal architecture is identified within the exocuticle of an impact-resistant crustacean appendage. This previously unreported composite microstructure, which features highly textured apatite mineral templated by an alpha-chitin matrix, provides enhanced stress redistribution and energy absorption over the traditional helicoidal design under compressive loading. Nanoscale toughening mechanisms are also identified using high load nanoindentation and in-situ TEM picoindentation.

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