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The elastic secrets of the chameleon tongue

par Moulton, Derek D.E.;Lessinnes, Thomas ;O’Keeffe, Stephen;Dorfmann, Luis;Goriely, Alain
Référence Proceedings - Royal Society. Mathematical, physical and engineering sciences, 472, 2188, page (20160030)
Publication Publié, 2016-04

Article révisé par les pairs

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Résumé :

The ballistic projection of the chameleon tongue is an extreme example of quick energy release in the animal kingdom. It relies on a complicated physiological structure and an elaborate balance between tissue elasticity, collagen fibre anisotropy, active muscular contraction, stress release and geometry. A general biophysical model for the dynamics of the chameleon tongue based on large deformation elasticity is proposed. The model involves three distinct coupled subsystems: the energetics of the intralingual sheaths, the mechanics of the activating accelerator muscle and the dynamics of tongue extension. Together, these three systems elucidate the key physical principles of prey-catching among chameleonides.