Multiaxial Low Cycle Fatigue Life Prediction under N onproportional Loading
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概要
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This paper studies the effect of nonproportional straining on tension-torsion low cycle fatigue lives of two types of materials. Extensive low cycle fatigue tests under 14 proportional and non-proportional strain paths were carried out using Type 304 stainless and 6061 aluminum hollow cylinder specimens at room temperature, to draw influential factors on low cycle fatigue lives. Nonproportional straining significantly reduced fatigue lives depending on strain history and mate-rial. Nonproportional strains proposed in this paper,ΔεNP and ΔεNP successfully correlated nonproportional low cycle fatigue lives for the two materials. However, ASME strain, defined in Code Case, gave a significantly unconservative prediction.
- 福井大学工学部の論文
福井大学工学部 | 論文
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