階段状円筒の軸圧潰における入れ子式変形

概要

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In this paper, the crushing behavior of stepped circular tube is studied by axial compression with finite element method. It is found that two-and-more steps of stepped circular tubes are considered as a combination of two steps of stepped circular tubes, which the crushing behavior relevant to compressive load and deformed displacement can be predicted. In comparison with the compressive load from finite element method, the predicted one is a little greater due to the difference of boundary conditions. The mechanism of telescopic deformation of stepped circular tube is mainly composed of bending, rotating, and stretching. However, another mechanism is appeared when the length between radii of steps is short enough. As far as geometric parameter concerned, the longer the axial length of stepped circular tube is, the higher degree of rotating angle becomes. And, the initial load grows with the increase of fillet radius. Further, the average of compressive load is also investigated.
社団法人日本機械学会の論文
2007-10-25