繰返し内圧を受ける円筒の疲れ強さに及ぼす圧力媒体の影響 : 軟鋼,ステンレス鋼,マンガン鋼,アルミニウム合金,銅の円筒の場合

概要

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A thin cylinder of ductile materials was subjected to internal pressure by various media, and the fatigue strength of the materials was determined experimentally as the effect of different media. The metallic materials of the thin cylinder were mild steel, stainless steel, manganese steel, aluminium alloy and copper metal. Various kinds of actuating pressure media -water, 3 percent saltwater, turbine oil and castor oil- were used to test the cylinder. S-N curves for the pressure medium show inherent fatigue strength in combination of the medium and metallic materials. On the surface of the ferrous metal, marks peculiar to corrosion fatigue were observed in the inner cylinders. Free energy change given ΔG by Gibbs is adopted as a parameter of reactivity in the relation metal and environments of medium. The fatigue strength of thin cylinder for pressure medium is correlated to the free energy of metal.
一般社団法人日本機械学会の論文
1985-09-25