三角形断面を有するシュロ枝の力学的特性

概要

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The cross section of main frame structure is preferable to be a cylinder for plants and animals in order to adapt to their environment. There are some exceptionals. One of those is a hemp palm branch. It has an up side-down isosceles triangular shape. Since the hemp palm branch has unusually large leaves and a relatively slender branch stem as compared with other trees, the branches must be subjected a large bending moment. A triangular cross section must be a solution for that problem, which can reduce the induced stress about 30% under a bending stress. Furthermore, the branch is a composite material reinforced by strong fibers. It also constructs a functionally graded structure on fiber distribution. This structure provides a higher strength in the critical loded region than the induced stress there.
一般社団法人日本機械学会の論文
1999-12-25