半球殻の衝撃破損に關する實驗
1942 年 9 巻 81 号 p. 22-31
詳細
1942 年 9 巻 81 号 p. 22-31
When the nose of the aeroplane body, or the seaplane float, collides with the ground or any other body, considerable energy is absorbed by impact failure at this point. As a simple case of these problems, experimental studies were made in connexion with the phenomeua at the instant of impact when a hemispherical shell made of superduralumin collides with a cast iron disk in the direction of the axis of the hemisphere. As will be seen from Fig. 2, device for obtaining the space-time curve during impact is very simple. The maximum impact resistance was calculated approximatelv from the record of the space-time curve, as shown in example (10), without double differentiation. The relation between the absorbed energy and the thickness, the radius, and the deformation of the hemispherical shell, as also between the maximum impact resistance and that of the shell were obtained by empirical methods, see examples (17) and (20).
