ドリルの曲げたわみとねじり応力に及ぼすドリルのねじれの影響

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  • Effects of Twist on the Deflection Due to Bending of a Twist Drill and on the Surface Stresses Due to Torsion of It
  • ドリル ノ マゲタワミ ト ネジリ オウリョク ニ オヨボス ドリル ノ ネジレ ノ エイキョウ

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It is expected that a twist drill will give somewhat different aspects on the deflection and stresses compared with a straight bar of the same cross-section. In the first part of the present research, we proved theoretically that the deflection of a twist drill due to bending becomes a particular space curve. The surface stresses of the drill due to torsion, obtained experimentally by the strain gauges, are shown in this report also.

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