Measurement on Fatigue Cracking Thresholds of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames

Abstract:

Measurement on fatigue cracking thresholds is investigated to the grade B cast steel for China railway rolling wagon bogie frames. Compact tensional specimens are fatigued under a continuous decreasing loading mode for present study. Results reveal that the minimum test values have different crack growth rates without meeting the code-based rate requirement. Therefore, the test results can not be directly used for measuring the thresholds. A probabilistic modeling in the form of a non-linear law is developed for reflecting the scattered test data. The thresholds at specified reliability levels are then derived in meeting the threshold definition with a specified growth rate. The measurement for the present material has verified the availability of the present modeling.

• Periodical: Advanced Materials Research (Volumes 118-120)
• Pages: 111-115
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.118-120.111
• Online since: June 2010
• Authors: Hai Bin Hu, Yong Xiang Zhao
• Keywords: Bogie Frame, Cast Steel, Cracking Threshold, Fatigue, Railway, Rolling Wagon

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