Probabilistic Crack Propagation Behavior of Railway B Grade Steel

Abstract:

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Fatigue crack growth rate (FCGR) test of B grade steel was performed to clarify the probabilistic behavior of crack propagation in near-threshold region and steady-state region. As a result, a crack propagation law considering influence of threshold value and average stress can be well proposed to estimate crack propagation behavior of B grade steel. The estimated value of threshold value ΔKth is 293.65MPamm1/2, approaching the experimental value of ΔKth, about 280.39MPamm1/2. Furthermore, the probabilistic FCGR curves of B grade steel are established from the viewpoint of survival probability and confidence degree, which reflects the influence of scatter regularity of data and sample size on reliability assessment.

Info:

Periodical:

Advanced Materials Research (Volumes 97-101)

Edited by:

Zhengyi Jiang and Chunliang Zhang

Pages:

484-487

DOI:

10.4028/www.scientific.net/AMR.97-101.484

Citation:

W. Li et al., "Probabilistic Crack Propagation Behavior of Railway B Grade Steel", Advanced Materials Research, Vols. 97-101, pp. 484-487, 2010

Online since:

March 2010

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Price:

$35.00

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