Abstract
The final goal of this study is to apply the mechanism of inversion plastic deformation of an aluminum tube to the buffer for a high-speed elevator instead of oil-buffer. In this paper, first, an annealed aluminum tube compressed on a conical die is shown to cause stable inversion plastic deformation, which has an ideal load-displacement curve as a shock absorber for various kinds of elevators. Secondly, it is described that the boundary between inversion and progressive buckling depends on the ratio of the thickness to the diameter of the tube. Finally, the buffer characteristics of this type shock absorber are confirmed to be useful for elevator absorbers from the dynamic test.
