ねじ締結体の疲労強度 : ねじ締結体が連接棒の場合

概要

論文の詳細を見る
Many studies have been performed about the fatigue strength of the bolt-nut joint, but principally, only the strength of threaded portion are discussed. Since the stresses on the bolt are very complicated in bolted joints, it is dangerous to predict fatigue strength of the bolt only from the strength at the threaded portion. A connecting rod was selected as an example of bolted joints, and fatigue test was performed. Stresses on the bolt were analyzed, and the relationship between stresses and fatigue strength is discussed at each location. The main conclusions obtained in this study are as follows : (1) The bolt in the connecting rod was failed by fatigue when preload was very small. (2) The failure occurred at the middle of the notch-free body, and this is thought to be caused by fretting. (3) The predicted fatigue limit, including the case of fretting fatigue, was compared with the stress condition, and possibility of the fatigue failure at the middle of the body could be confirmed.
公益社団法人精密工学会の論文
1984-05-05