けい素鋼板の疲労き裂進展に及ぼす異方性, スリット角の影響

概要

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Recently, generators and moters undergo higher rotating velocity and frequent stop and start. As the result, the roter receives an alternating high centrifugal force. In this paper, the fatigue crack propagation behavior of S14 silicon steel sheet was investigated, because it is usually used as the iron core of roter. The following results are obtained: Under the mode I condition, no effect of anisotropy appears to the fatigue crack propagation behavior. On the other hand, the effect of anisotropy appears under the mode I and II complex conditions, and it becomes more remarkable as the increase of the mode II component. The reason seems to be based on the discrepancy of the real crack propagation direction and the weakest direction to the fatigue crack propagation resistance which is caused by roll.
社団法人日本機械学会の論文
1990-06-25