@article {59,
	title = {Mechanics of axisymmetric sheets of interlocking and slidable rods},
	journal = {Journal of the Mechanics and Physics of Solids},
	volume = {141},
	year = {2020},
	pages = {103969},
	abstract = {<p align="justify">In this work, we study the mechanics of metamaterial sheets inspired by the pellicle of Euglenids. They are composed of interlocking elastic rods which can freely slide along their edges. We characterize the kinematics and the mechanics of these structures using the special Cosserat theory of rods and by assuming axisymmetric deformations of the tubular assembly. Through an asymptotic expansion, we investigate both structures that comprise a discrete number of rods and the limit case of a sheet composed by infinitely many rods. We apply our theoretical framework to investigate the stability of these structures in the presence of an axial load. Through a linear analysis, we compute the critical buckling force for both the discrete and the continuous case. For the latter, we also perform a numerical post-buckling analysis, studying the non-linear evolution of the bifurcation through finite elements simulations.\&nbsp;</p>},
	keywords = {Biomimetic structures, Elastic structures, Helical rods, Mechanical instabilities, Metamaterials, Post-buckling analysis},
	doi = {10.1016/j.jmps.2020.103969},
	author = {Davide Riccobelli and Giovanni Noselli and Marino Arroyo and Antonio De Simone}
}
@article {57,
	title = {Morphable structures from unicellular organisms with active, shape-shifting envelopes: Variations on a theme by Gauss},
	journal = {International Journal of Non{\textendash}Linear Mechanics},
	volume = {118},
	year = {2020},
	pages = {103278},
	abstract = {<p align="justify">We discuss some recent results on biological and bio-inspired morphing, and use them to identify promising research directions for the future. In particular, we consider issues related to morphing at microscopic scales inspired by unicellular organisms. We focus on broad conceptual principles and, in particular, on morphing approaches based on the use of Gauss{\textquoteright} theorema egregium (Gaussian morphing). We highlight some connections with biological cell envelopes containing filaments and motors, and discuss ideas for the implementation of Gaussian morphing in surfaces actuated by active shearing or stretching.\&nbsp;</p>},
	keywords = {Active shells, cell motility, Deployable structures, Fluid{\textendash}structure interaction, Gaussian morphing, Micro-swimmers, soft robotics, Unicellular swimmers},
	doi = {10.1016/j.ijnonlinmec.2019.103278},
	author = {Giancarlo Cicconofri and Giovanni Noselli and Marino Arroyo and Antonio De Simone}
}
