PSI - Issue 33

D.D. Okulova et al. / Procedia Structural Integrity 33 (2021) 1055–1064 Author name / Structural Integrity Procedia 00 (2019) 000–000

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 Dependencies of the maximum relative stress on the number of defects are qualitatively the same in the cases of linearly elastic and elastic-plastic models. Nevertheless, the stress concentration in the case of the elastic-plastic model is about 40% lower than in the case of the pure elastic model.  The maximum values of stresses are observed in the zones of sharp edges formed between the notches which slightly overlap or almost touch – both for random and periodical distributions of multiple defects, as well as for only two defects.  The distance between neighbouring defects is a significant but not the only factor affecting the maximum stresses on the surface of pressure vessels. Acknowledgements This work was supported by the Russian Science Foundation, grant No 21-19-00100. References Ahmed, A. B., Houria, M. I., Fathallah, R., Sidhom, H., 2019. The effect of interacting defects on the HCF behavior of Al-Si-Mg aluminum alloys. Journal of Alloys and Compounds, Volume 779. 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