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Theses

PLI ET FORME DES FEUILLES

Abstract : We have noticed an original analogy between the leaf configuration in the bud the paper dolls. If you fold a paper sheet and cut it with scissors, each fold will either a sinus either a lobe when you unfold it. A lot of leaves follow this geometry in the bud. The leaf margin is folded on a plane as if it had been cut with scissor For this purely geometric reason, lobes and sinuses of the unfolded leaf exactely correspond to the initial folds. We have called these leaves “kirigami”, which means cut-paper. The purely geometric first part of this thesis shows how much the leaves geometries are constrained by their folded development. We also show that these geometries are very diverse and create very different leaves shapes. The second more biologic part proposes a mecanism for the fold development and a candidate to the scissor role. We conclude by giving an original insight on leaf shape evolution.
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https://tel.archives-ouvertes.fr/tel-00443868
Contributor : Etienne Couturier Connect in order to contact the contributor
Submitted on : Monday, January 4, 2010 - 5:30:18 PM
Last modification on : Saturday, June 25, 2022 - 8:49:23 PM
Long-term archiving on: : Thursday, June 17, 2010 - 10:17:01 PM

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  • HAL Id : tel-00443868, version 1

Citation

Etienne Couturier. PLI ET FORME DES FEUILLES. Physique [physics]. Université Paris-Diderot - Paris VII, 2009. Français. ⟨tel-00443868⟩

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