成形ベローズに関する研究 (第2報)

一定肉厚でないU形成形ベローズの軸力を受ける場合の応力計算図

抄録

The stresses caused by axial deflection of hydroformed bellows were generally calculated by shell theory solution or energy solution. In both cases, the calculation model of the bellows will be simplified and the thickness of the bellows convolutions will be assumed as a uniform thickness plate. And calculation solutions were often improper compared with experimental results. Since the sectional thickness of hydroformed bellows is different at outer side of bellows or inner side of bellows, a finite element method was applied to get the stresses caused by axial deflection of the bellows in this paper. The calculation stresses indicate that the thickness difference at OD and ID is very delicate to the stresses. Therefore, this paper proposes that the finite element method will be effective to estimate the accurate stresses caused by axial deflection of bellows, because the ratio of OD thickness and ID thickness can be reflected in the calculation easily.