高応力コイルばねの応力と疲れ特性

概要

論文の詳細を見る
Nowadays, phenomena concerning cylindrical springs designed to be under high stress are such that failure of cylindrical springs starts from the outside of the cylinder coil and the fatigue life of such springs is shorter than that of traditionally designed springs. The springs designed to be under high stress have larger pitch angles than those of traditional springs. The above phenomena show that Wahl's equation can not calculate proper design conditions of such modern springs.This paper describes an analysis of cylindrical springs by taking account of pitch angles which can so far be ignored in traditional spring design and shows the clear relationship between specifications of a spring and its stress. This paper also demonstrates that the maximum principal stress of the coil outside is greater than that of the coil inside as spring stress is higher and that the fatigue life of springs designed under high stress may be inferred from fatigue test results of traditionally designed springs by assessment of S-N curves in terms of the maximum principal stress.
日本ばね学会の論文