周期的な波を有する円筒と角筒の軸圧潰における周方向のひずみ集中
2007 年 73 巻 727 号 p. 323-330
詳細
2007 年 73 巻 727 号 p. 323-330
In this paper, circumferential strain concentration in cylindrical and square tubes with corrugated surface subjected to axial compression are studied by using finite element method. For cylindrical tubes, the yielding tress σy, hardening coefficient Eh of material and thickness t of tube have only a small influence on the strain concentration, and maximum circumferential strain can be evaluated approximately as a function of wavelength 2λ and amplitude a of corrugation and cylinder radius R. For square tubes, however, effect of the corner radius r, the thickness t, and the yielding stress σy, hardening coefficient Eh on the strain concentration is comparable as wavelength 2λand amplitude a of corrugation. The maximum circumferential strain is larger as the corner radius r/Dis small, as the thickness t is thin, and as ratio of σy/Eh is large.
