試作せる複合ひずみ波形ねじり疲れ試験機およびその試験結果について

概要

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In this paper the influence of strain wave form on fatigue life was investigated as one of the fundamental researches on fatigue phenomena under actual load. A torsional fatigue testing machine was designed to generate a composite wave form γ=γ_1'sin (2πft)+γ_2'sin (4πft), and some experiments were carried out on a mild steel. The principle of the machine is to combine two different strain waves γ_1' and γ_2'. The result is as follows : The strain amplitude smaller than the endurance strain γ_w has little influence on the fatigue damage. And the fatigue life under the composite waves are approximately predicted by using γ_p-N curve or γ-N curve and the linear damage law. Also, it has been revealed that the endurance strain limit is nearly equal to the torsional strain at yield point.
一般社団法人日本機械学会の論文
1964-01-25