PSI - Issue 59

Mykola Pidgurskyi et al. / Procedia Structural Integrity 59 (2024) 322–329 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

329

8

The analysis of the obtained data showed that at the length of the crack L = 25 mm (0.4 b /2) the results obtained by the two methods differ by 10.4%, and at the crack length L = 30 mm (≈ 0.5 b /2) by 12.6%. Conclusions The results of SIF determination of cracks that develop in sections with a complex configuration obtained in this article allow for a more reasonable approach to determining the life service time and increasing the reliability of operation of an open profile thin-walled elements of constructions. Thus, the proposed simple engineering method for determining the stress intensity factors of the normal separation for the edge crack in the cross-section of the I-beam allows obtaining mathematical dependencies for the SIF estimation and providing the solution of practical problems with sufficient accuracy. This problem was also solved using the finite element method. A comparison of the results of theoretical studies with the results of simulation modeling showed that the discrepancies do not exceed 12% when the length of the major crack in the flange is up to 30 mm. In the future, it is expedient to apply the specified methods for the calculation of the SIF in a defective I-beam with simultaneous crack propagation into two branches: in the web and in the flange. References Anderson T.L., 2017. Fracture Mechanics Fundamentals and Applications, Fourth ed., Boca Raton, CRC Press. Andreikiv, A.E. and Darchuk, A.I., 1992. Fatigue failure and structures durability. Kiyv, Naukova dumka, 184. [in Russian] Andreikiv, A.E., 1982. Spatial Problems of the Theory of Cracks. Kiyv, Naukova dumka, 348. [in Russian] Andreikiv, O. E., Lysyk, A.R., Shtayura, N. S, and Babii A.V., 2018. Evaluation of the Residual Service Life of Thin-Walled Structural Elements with Short Corrosion-Fatigue Cracks. Materials Science 53 (4), 514-521. Dunn, M., Suwito, W., Hunter, B.,1997. Stress Intensity Factor Cracked I-Beams. Engineering Fracture Mechanics 57(6), 609-615. Hevko, R., Stashkiv, M., Lyashuk, O., Vovk, Y., Oleksyuk, V., Tson, O., Bortnyk, I., 2021. Investigation of internal efforts in the components of the crop sprayer boom section. Journal of Achievements in Materials and Manufacturing Engineering 105(1), 33-41. Kienzler, R. and Hermann G., 1986. An Elementary Theory of Defective Beams. Acta Mecanica 62, 37-46. Knysh, V.V. and Solovei, S.A., 2017. Increasing the durability of welded joints with fatigue damage. Kyiv, KPI, 320. [in Russian] Lee, H.H., 2019. Finite Element Simulations with ANSYS Workbench 19, SDC Pub., 2019. Lyashuk, O., Levkovych, M., Vovk, Y., Gevko, I., Stashkiv, M., Slobodian, L., Pyndus, Y., 2023. The study of stress-strain state elements of the truck semi-trailer body bottom. Scientific Journal of Silesian University of Technology. Series Transport 118, 161-172. Makhnenko, V. I., 2006. Resource for safe operation of welded joints and assemblies of modern structures. Kyiv, Naukova dumka, 619 [in Russian]. Panasiuk, V.V., 1992. Mechanics of quasi-brittle fracture of materials. Kiyv, Naukova dumka, 416 [in Russian]. Pawar, P., Ballav, R., Kumar, A., 2016. Finite element method analysis of stress intensity factor in I channel section. Journal of Production Engineering 19, 103-107. Pidgurskyi, I., Pidgurskyi, M., Yasniy, P., Baranovskyi, V., Shelestovskyi, B., Stashkiv M., 2022. Mathematical model for estimating SIF K I during coalescence of two identical surface cracks. Procedia Structural Integrity 36, 171-176. Pidgurskyi, M., Stashkiv M., Pidgurskyi I., 2021. Determining stress intensity factors of mode I for the crack in rectangular cross-section ofthin-walled beam // International scientific journal "Machines. Technologies. Materials" 15(3), 89-92. Rybak, T.I., 1985. Assessing methods the bearing capacity and durability of chemical protection machines in crop production. Kiyv, Naukova dumka, 232 [in Russian]. Syrotyuk, А.М., Babii, А.V., Barna, R.А., Leshchak, R.L., Marushchak, P.О., 2021. Corrosion -Fatigue Crack-Growth Resistance of Steel of the Frame of a Sprayer Boom. Materials Science 56(4), 466-471. Zheng, S., Cheng, K., Wang, J., Liao, Q., Liu, X., Liu, W., 2015. Failure analysis of frame crack on a wide-body mining dump truck. Engineering Failure Analysis 48, 153-165.