Articles | Volume 14, issue 2
Research article
20 Oct 2023
Research article |  | 20 Oct 2023

Finite-element method for the analysis of surface stress concentration factor and relative stress gradient for machined surfaces

Guangtao Xu, Zeyuan Qiao, Shaokang Wu, Tianyi Liu, Minghao Zhao, and Gang Wang

Related subject area

Subject: Machining and Manufacturing Processes | Techniques and Approaches: Mathematical Modeling and Analysis
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Cited articles

Abroug, F., Pessard, E., Germain, G., and Morel, F.: A probabilistic approach to study the effect of machined surface states on HCF behavior of a AA7050 alloy, Int. J. Fatigue, 116, 73–99, 2018. 
Adib-Ramezani, H. and Jeong, J.: Advanced volumetric method for fatigue life prediction using stress gradient effects at notch roots, Comp. Mater. Sci., 39, 649–663, 2007. 
Ardi, D. T., Li, Y. G., Chan, K. H. K., Blunt, L., and Bache, M. R.: Surface topography and the impact on fatigue performance, Surf Topogr: Metrol. Prop., 3, 015007,, 2015. 
Arola, D. and Williams, C. L.: Estimating the fatigue stress concentration factor of machined surfaces, Int. J. Fatigue, 24, 923–930, 2002. 
Ås, S. K., Skallerud, B., Tveiten, B. W., and Holme, B.: Fatigue life prediction of machined components using finite element analysis of surface topography, Int. J. Fatigue, 27, 1590–1596, 2005. 
Short summary
Surface topography is an important feature to evaluate the surface quality of components, as is the stress concentration caused by the random surface topography. This paper proposes a numerical analysis method to study surface stress concentration factor (SCF) and relative stress gradient (RSG) for notched round-bar specimens. The surface SCF and RSG increased with increasing surface roughness, and a linear function relationship of surface roughness with surface SCF and RSG was established.