Twist-to-Bend Ratios and Safety Factors of Petioles Having Various Geometries, Sizes and Shapes.

ABSTRACT: From a mechanical viewpoint, petioles of foliage leaves are subject to contradictory mechanical requirements. High flexural rigidity guarantees support of the lamina and low torsional rigidity ensures streamlining of the leaves in wind. This mechanical trade-off between flexural and torsional rigidity is described by the twist-to-bend ratio. The safety factor describes the maximum load capacity. We selected four herbaceous species with different body plans (monocotyledonous, dicotyledonous) and spatial configurations of petiole and lamina (2-dimensional, 3-dimensional) and carried out morphological-anatomical studies, two-point bending tests and torsional tests on the petioles to analyze the influence of geometry, size and shape on their twist-to-bend ratio and safety factor. The monocotyl

SUBMITTER: Langer M 

PROVIDER: S-EPMC8632552 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature