Fatigue Failure Life of SS400 Steel under Non-Proportional Loading in High Cycle Region

Abstract:

This study discusses fatigue properties of low carbon steel under multiaxial non-proportional loading and an evaluation of failure life. Multiaxial fatigue tests under non-proportional loading with various stress amplitudes were carried out using a hollow cylinder specimen in low and high cycle regions at room temperature. In the test, three types of strain/stress path were employed. They are a push-pull, a reversed torsion and a combined push-pull and reversed torsion loadings in which stress amplitudes used were constant and random. This study evaluates an effect of non-proportional loading on fatigue life in the high cycle fatigue region to discuss the applicability of Δε_NP proposed by Itoh et al. on life evaluations in the high cycle region and under random loading.

• Periodical: Advanced Materials Research (Volumes 891-892)
• Pages: 1385-1390
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.891-892.1385
• Online since: March 2014
• Authors: Takahiro Morishita, Shu Li Liu, Takamoto Itoh*, Masao Sakane, Hideyuki Kanayama, Masahiro Sakabe, Norio Takeda
• Keywords: Fatigue, Life Evaluation, Multiaxial Stress, Non-Proportional Loading, Random Loading

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