ORIGINAL RESEARCH article
Front. Mater.
Sec. Mechanics of Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1593388
Fatigue Crack Propagation Test and Numerical Simulation Analysis of B780CF Steel
Provisionally accepted
- Yunnan Agricultural University, Kunming, China
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This study investigates the fatigue crack propagation of B780CF steel. Firstly, the fatigue crack growth tests were conducted on compact tensile (CT) specimens under a stress ratio of R = 0.1, the fatigue crack growth rate (FCGR) was calculated using a seven-point polynomial method, and the Paris formula parameters were fitted to the range of stress intensity factors (K). Then, A numerical simulation of fatigue crack propagation based on the J-integral was conducted using an improved meshing strategy. Finally, the comparative analysis between experimental and simulated results showed that the improved meshing method achieved an average absolute error of 4.9% in fatigue life prediction, which verifies the accuracy of the numerical simulation method. This study provides a reliable framework for analyzing fatigue crack growth in B780CF steel, combining experimental characterization with simulation techniques.
Keywords: B780CF steel, Fatigue crack propagation test, Range of stress intensity factors, J-Integral, numerical simulation
Received: 14 Mar 2025; Accepted: 07 May 2025.
Copyright: © 2025 Gu, Li, Zhang and Li. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Guirong Li, Yunnan Agricultural University, Kunming, China
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