Mechanical Properties of Lamina and Veins in Butterbur Leaf and Its Venation Pattern

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  • 920 フキの葉における葉身・葉脈の力学的特性と葉脈パターン

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To investigate the mechanical characteristics of veins in butterbut (Petasites japonicus) leaves, the angle of veins, their length and diameter, the thickness of lamina etc. were measured A series of static tensile tests for veins and lamina were also carried out to obtain their mechanical properties. It was found that the vein volume including in an unit area of lamina is almost constant over a butterbur leaf. From the tensile tests, it was obtained that tensile strength and Young's modulus of the vein were 2.24 MPa and 63.6 MPa, respectively, and they are much greater than those of lamina.

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