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Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes

Stomatopods deliver one of the fastest strikes in the animal kingdom using their powerful “dactyl clubs.” This kinematic performance is enabled by a power amplification device whereby elastic energy is stored in a saddle-shape mineralized bilayer structure. We combined a set of comprehensive micro-m...

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Detalles Bibliográficos
Autores principales: Tadayon, Maryam, Amini, Shahrouz, Wang, Zhongke, Miserez, Ali
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6204534/
https://www.ncbi.nlm.nih.gov/pubmed/30344051
http://dx.doi.org/10.1016/j.isci.2018.08.022
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author Tadayon, Maryam
Amini, Shahrouz
Wang, Zhongke
Miserez, Ali
author_facet Tadayon, Maryam
Amini, Shahrouz
Wang, Zhongke
Miserez, Ali
author_sort Tadayon, Maryam
collection PubMed
description Stomatopods deliver one of the fastest strikes in the animal kingdom using their powerful “dactyl clubs.” This kinematic performance is enabled by a power amplification device whereby elastic energy is stored in a saddle-shape mineralized bilayer structure. We combined a set of comprehensive micro-mechanical measurements with finite element modeling (FEM) to quantitatively elucidate the saddle biomechanical design. Dynamic nano-scale testing reveals that viscoelastic dissipation is minimized in the highly mineralized layer, whereas micro-bending experiments on miniature cantilevers highlight the critical role of the bilayer arrangement in optimizing storage of elastic energy. FEM shows that the saddle shape prevents stress concentration and the stresses remain well within the elastic range during loading, while the neutral surface coincides with the bilayer interface to prevent interfacial delamination. The study unveils the multi-scale design behind the intriguing ability of the saddle to store a high density of elastic energy using stiff but intrinsically brittle materials. VIDEO ABSTRACT:
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spelling pubmed-62045342018-11-01 Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes Tadayon, Maryam Amini, Shahrouz Wang, Zhongke Miserez, Ali iScience Article Stomatopods deliver one of the fastest strikes in the animal kingdom using their powerful “dactyl clubs.” This kinematic performance is enabled by a power amplification device whereby elastic energy is stored in a saddle-shape mineralized bilayer structure. We combined a set of comprehensive micro-mechanical measurements with finite element modeling (FEM) to quantitatively elucidate the saddle biomechanical design. Dynamic nano-scale testing reveals that viscoelastic dissipation is minimized in the highly mineralized layer, whereas micro-bending experiments on miniature cantilevers highlight the critical role of the bilayer arrangement in optimizing storage of elastic energy. FEM shows that the saddle shape prevents stress concentration and the stresses remain well within the elastic range during loading, while the neutral surface coincides with the bilayer interface to prevent interfacial delamination. The study unveils the multi-scale design behind the intriguing ability of the saddle to store a high density of elastic energy using stiff but intrinsically brittle materials. VIDEO ABSTRACT: Elsevier 2018-10-18 /pmc/articles/PMC6204534/ /pubmed/30344051 http://dx.doi.org/10.1016/j.isci.2018.08.022 Text en © 2018 The Author(s) http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Article
Tadayon, Maryam
Amini, Shahrouz
Wang, Zhongke
Miserez, Ali
Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes
title Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes
title_full Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes
title_fullStr Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes
title_full_unstemmed Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes
title_short Biomechanical Design of the Mantis Shrimp Saddle: A Biomineralized Spring Used for Rapid Raptorial Strikes
title_sort biomechanical design of the mantis shrimp saddle: a biomineralized spring used for rapid raptorial strikes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6204534/
https://www.ncbi.nlm.nih.gov/pubmed/30344051
http://dx.doi.org/10.1016/j.isci.2018.08.022
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