2000 年 49 巻 4 号 p. 407-412
To obtain the new idea on the improved optimum composite material structures, the fore-wing structures of Allomyrina dichotoma and Prosopocoilus inclinatus have been investigated using scanning electron microscopy. As a result, the structural characteristics of the fore-wing of beetles are made clear and some new knowledge on the optimum light weight composite material structures is obtained. Particularly, the frame structure of the central void is observed in the fore-wing of the beetle, and it consists of the upper lamination, the central void and the lower lamination. The upper lamination and the lower lamination are joined through trabeculae between both of them. The cross section at the edges of the fore-wing is the rectangle and/or the triangle of the central void except the apex. The structure of the fore-wing of beetles possesses both high flexural rigidity and stable secondary moment of inertia and the frame structure of the central void is adopted ingeniously in it. Furthermore, a joint structure between the left and right fore-wings is found.