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Medientyp:
E-Artikel
Titel:
Umbrella leaves—Biomechanics of transition zone from lamina to petiole of peltate leaves
Beteiligte:
Sacher, Moritz;
Lautenschläger, Thea;
Kempe, Andreas;
Neinhuis, Christoph
Erschienen:
IOP Publishing, 2019
Erschienen in:
Bioinspiration & Biomimetics, 14 (2019) 4, Seite 046011
Sprache:
Nicht zu entscheiden
DOI:
10.1088/1748-3190/ab2411
ISSN:
1748-3182;
1748-3190
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>In this study we aim to show how the peltate leaves of <jats:italic>Colocasia fallax</jats:italic> Schott and <jats:italic>Tropaeolum majus</jats:italic> L., despite their compact design, achieve a rigid connection between petiole and lamina. We have combined various microscopy techniques and computed tomography (CT) scanning for the analysis of the basic structure of the plant’s stabilization system. Mechanical tests yielded key mechanical parameters and allowed us to assess the mode of failure. The results of the tests were further processed in a finite element method (FEM) analysis. We were able to show that both plants are able to endure high loads irrespective of the different composition of the supporting structure. <jats:italic>C. fallax</jats:italic> forms many separate branched strands, whereas <jats:italic>T. majus</jats:italic> forms fewer strands of greater diameter interconnected in the centre of the transition area, forming a bundle of irregular orientation. This results in different ways to dissipate loads on the lamina. In <jats:italic>C. fallax</jats:italic> we observed the outer strands of the strengthening tissue under high stress while the inner bundle carries little load. In <jats:italic>T. majus</jats:italic> the load is distributed more evenly through the juncture in the middle of the transition area. Potential applications include the construction of biomimetical flying roofs.</jats:p>