Random Fatigue Crack Growth Rates of China Railway Grade B Cast Steel Wheel

Abstract:

Fracture surface observations and statistical deriving are applied for the present investigation on the random fatigue crack growth rates of China grade B cast steel wheel. Results reveal that: the crack grows with relative regular initial tip companied fabric like stripes along the growth direction but few of fatigue striations, and then, cleavage flowers appearing on the district of transient fracture with few of dimples. It indicates that sharp notched structural crack behaviour acts as a few of plastic dissipation process. Non-linear statistical modeling covering entire three pieces of fatigue crack growth is constructed for describing the random crack growth rates. Scattered randomness of the growth rates has been well characterized.

• Periodical: Key Engineering Materials (Volumes 480-481)
• Pages: 387-392
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.480-481.387
• Online since: June 2011
• Authors: Yong Xiang Zhao, Bing Yang, Guo Xiang Song
• Keywords: Crack Growth Rate, Fatigue, Grade B Cast Steel, Railway, Wheel

References

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[2] AAR S-660: Analytic evaluation of locomotive and freight car wheel designs (Association of American Railroads, Washington, DC, USA, 2007).

[3] EN 13979-1: Railway applications —wheelsets and bogies —monobloc wheels —technical approval procedure —part 1: forged and rolled wheels (European Committee for Standardization, rue de Stassart, 36 B-1050 Brussels, 2003).

DOI: 10.3403/30334206

[4] EN 13262: Railway applications —wheelsets and bogies —wheels — product requirement (European Committee for Standardization, rue de Stassart, 36 B-1050 Brussels, 2004).

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