Abstract
The flapping robot is already made by many researcher in the world, but cannot fly as same as real insect and bird. Among them, dragonfly has been especially paying attention. Dragonfly perform very advanced flight. It is caused by the difference in partial stiffness of the wing. The purpose of this study is investigation of the effects by the difference of partial stiffness. Especially, dradonfly may be changed stiffness of the wings between the up stroke and down stroke. Therefore,it is necessary to compute changing the Young's modulus between the upper and lower surface.
