抄録
Morphology and material organization of living things in nature are extremely complicated, and their creation mechanism is not well understood. However, as it has evolved over the years, it seems to be the result of optimization to the natural world. Therefore, observing the structure of living organisms and clarifying their mechanical properties seem to be important for mechanical design. For this reason, we focus on trees that are familiar creatures in this study. Tsushima and others have made it clear that trees have a gradient function that increases the Young’s modulus as they go from the root to the tip. Such characteristics can be considered as a factor of flexibility of trees. Therefore, in this study, after choosing Ginkgo as a target material, we will determine the Young’s modulus distribution using both cantilever deflection measurement test and inverse analysis method with axially functionally graded material and taper. Next, a large deflection experiment is carried out by the same cantilever beam, and its deformation characteristics are clarified by comparing with the theoretical and the analysis results by Finite Element Method(FEM).
