Initial Behavior of Hysteresis Loop of Low Carbon Steels under Repeated Load : Theoretical Treatment on the multiplying model of dislocations

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概要

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• This is a second report of authors aiming to clarify the mechanism of the initial increase of the plastic strain amplitude Δε_p of low carbon steels under fatigue load. Close observations showed that a sharp increase of Δε_p took place after a gradual growth, and this gradual growing process had been analyzed in the first report by developing the interaction models between dislocations and solute carbon atoms under repeated load. Therefore, in this report, a sharp increase of Δε_p is theoretically dealt with by establishing a multiplying model of dislocation loops from the Frank-Read sources whose activation took place following the cease of the increase in the length of the movable dislocation lines upon reaching the strong pinning points. It is shown that the derived theory satisfactorily explains the experimental trend.

• 一般社団法人日本機械学会の論文

著者

• Hattori Shuji

  Graduate Student Faculty Of Science And Engineering Ritsumeikan University

• TANAKA Tsuneshichi

  Professor, Faculty of Science and Engineering Ritsumeikan University

• Tanaka Tsuneshichi

  Professor Faculty Of Science And Engineering Ritsumeikan University

関連論文

• Initial Behavior of Hysteresis Loop of Low Carbon Steels under Repeated Load : Theoretical Treatment on the multiplying model of dislocations

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