Reliability Research of 50 Axle Steel on the Ultra-High Cycle Fatigue Fracture Behavior under Ultrasonic Loading

Abstract:

In order to ensure the reliability of the fatigue design, the dispersion of S-N data obtained by ultrasonic fatigue test is usually researched by statistical assessment. Life distribution of fatigue strength of steel materials follows the lognormal distribution or Weibull distribution in general. In this paper, 50 axle steel is researched under symmetric tension and compression loading, and the ultra-high cycle fatigue test data of 50 axle steel are researched by the Weibull distribution, 50 axle steel is described by equation of Basquin, the mode of probability S-N curve are established. The results shows that very high cycle fatigue S-N data of 50 axle steel under symmetric tension and compression loading obey the Weibull distribution. Similar to the S-N curve of 50 axle steel, the probability S-N curves display the characteristic of “the multi-stage type” under the Weibull distribution.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 388-394
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.388
• Online since: January 2013
• Authors: Wei Wei Tang, Hong Wang
• Keywords: P-S-N Curve, S-N Curve, Symmetric Compression, Symmetric Tension, Ultrasonic Fatigue, Weibull Distribution

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DOI: 10.18057/icass2018.p.169

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