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Title: Biomechanical design of the mantis shrimp saddle : a biomineralized spring used for rapid raptorial strikes
Authors: Tadayon, Maryam
Amini, Shahrouz
Wang, Zhongke
Miserez, Ali Gilles Tchenguise
Keywords: Science::Biological sciences
Mechanical Property
Materials Science
Issue Date: 2018
Source: Tadayon, M., Amini, S., Wang, Z., & Miserez, A. G. T. (2018). Biomechanical design of the mantis shrimp saddle : a biomineralized spring used for rapid raptorial strikes. iScience, 8, 271-282. doi:10.1016/j.isci.2018.08.022
Series/Report no.: iScience
Abstract: 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.
Rights: © 2018 The Author(s).This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
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