横穴をもつ軟鋼中空円形はりの降伏 : 第2報, 実験の説明

抄録

In order to analyze the yield stress in the mild steel beam of a hollow circular cross section with a radial hole shown in the 1st report, it is found that the point of the maximum stress in a beam is varied by the ratio γ₁ of inner to outer diameter of the beam. Analyses of the yield stresses of beams supposed a parallel strip to the neutral axis at that point in the range of γ₁≤0.65, and supposed an infinite plate at that point in the range of γ₁≥0.65 and are then carried out by considering the effect of the surface layer which is inherent for the material. The analytical results agree very closely with the experimental results shown in the lst report. The thickness of the surface layer of the mild steel taken in this case is 0.12 mm.