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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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Fujio NAKANISHI
Article type: Article
1928 Volume 31 Issue 130 Pages
39-49
Published: February 20, 1928
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As to the yielding of materials the maximum shear stress theory is generally believed to be correct. But the author has a quite different idea. It is the same that the yielding of mild steel is due to shear, but it does not obey the maximum stress theory. It is a problem of stability. And so the maximum stress at yield point differs when the stress distribution is not similar. By the experiments of torsion of hollow bars this fact is ascertained. By the author's theory the moment at yield point by torsion must be proportional to the moment of area of cross section, and this fact agrees very well with experiments.
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Kango TAKEMURA
Article type: Article
1928 Volume 31 Issue 130 Pages
50-52
Published: February 20, 1928
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This short note shows mathematically that the air for combustion per unit weight of paraffins decreases with the increase of specific gravity, but with benzenes the case is just opposite, while naphthenes offers no change at all, and that the variation in the constituents or products or combustion per unit weight or the fuel runs as follows with ths increase of specific gravity : -
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Iwazo NAKAYAMA
Article type: Article
1928 Volume 31 Issue 130 Pages
53-67
Published: February 20, 1928
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The problem may be solved easily by using the bipolar coordinates. The solutions which satisfy ▽^4ω=0 in our coordinates are [numerical formula]. The boundary conditions are (1) When we sum up the vertical shearing force N along any vertical cylindrical surface which include the single load P within it, we have ∫Nds=P (2) For a fixed plate, we have at the edge η=η_o, ω=0 and [numerical formula] (3) For a supported plate, we have at the edge η=η_o, ω=0 and G=0,G being a flexural couple. (4) At the pole η=∞, coshη and sinhη will be also infinitely large, the condition that ω shall be finite at the pole is satisfied by B'=-Λ' For the case of fixed boundary, we may take ω_2 only as the form of the deflection, but for supported edge, we must use ω_2 together with ω_1 and therefore the solution will extend to infinite series, but according to the properties of rapid convergency, a few of the lowest terms will be sufficient for practical purpose. For both cases, the deflection at the pole and the normal stress ηη on the centre line for various values of eccentricity e will be illustrated and tabulated.
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[in Japanese]
Article type: Article
1928 Volume 31 Issue 130 Pages
68-69
Published: February 20, 1928
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Article type: Appendix
1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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1928 Volume 31 Issue 130 Pages
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