鋼の回転曲げ塑性疲れ試験

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タイトル別名
  • Rotating Bending Fatigue Tests of Steel in the Plastic Range
  • コウ ノ カイテン マゲ , ソセイ ツカレ シケン

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Constant stress and constant deflexion low cycle fatigue tests were carried out on 0.35% Carbon steel under the conditions of 110rpm, 62 rpm and 62 rpm (air blast cooling) at room temperature, with a Wohler type fatigue testing machine. Changes of vertical deflexion and horizontal deflexion at the loading end of test specimens were measured throughout the constant stress test; the change of stress in another test. Process of crack initiation and propagation was also observed. The main results obtained are as follows : Effect of frequency and cooling was recognized in constant stress test, but not in another test. Changes of deflexion and stress showed perfectly opposite tendency. Process of crack initiation and propagation was quite different in the respective tests. Moreover, both test results are compared and discussed on the basis of static bending test data.

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