中心孔を有する大型バックアップロールの破壊事故品の応力解析と材料強度評価による検討

概要

論文の詳細を見る
Breaking accidents which started at the center bore face of the journal of large sized backup rolls were experienced. To settle these problems, the working stresses inflicted on the center bore face of the backup roll was analysed by the three-dimensional photoelastic method. The fatigue strength of the test pieces taken from the core part of the journal and the residual stresses were also investigated. The main results obtained are as follows : 1) Though the repeated tensile stresses were inflicted on the center bore face of the journal, they were not so large. It is thought that the main cause of the fracture in question was the residual tensile stresses there. 2) The fatigue strength in the core part of the journal was equivalent or less than the fatigue strength of the sharp notched test pieces. 3) It was concluded that the breaking accidents from the center bore face could be prevented by giving the residual compressive stresses on the bore face.
社団法人日本鉄鋼協会の論文
1989-08-01