PSI - Issue 52

Lucie Malíková et al. / Procedia Structural Integrity 52 (2024) 376–381 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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4. Conclusions A simplified finite element model was created to simulate behavior of a short fatigue crack growing from the bottom of a circular-segment-shaped corrosion pit, where the maximal stress concentration occurs. A parametrical study was performed to assess the influence of the corrosion pit size (corresponding to various level of corrosion) on further propagation of an initially angled crack. The results show that the corrosion pit size affects behavior of only very short cracks, and it was observed that a ten times larger corrosion pit ( D = 1.0 mm vs. D = 0.1 mm) causes approximately twice as large values of the stress intensity factor ranges  K I and  K II . Now, it is intended to relate the results of the numerical simulations to experimental observations on corrosion pit defects corresponding to various corrosion conditions. Then, the results will help to understand the change in fatigue properties of corroded HSS. Acknowledgements Financial support from the Czech Science Foundation (project No. 21-14886S) and from the Faculty of Civil Engineering, Brno University of Technology (project No. FAST-S-23-8216) is gratefully acknowledged. References Anderson, T. L., 2017. Fracture Mechanics: Fundamentals and applications . CRC Press, Boca Raton, p. 684. ANSYS, 2022. www.ansys.com. Balbín, J. A., Chaves, V., Larrosa, N. O., 2021. Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural model. Corrosion Science 180, paper 190171. Bastidas-Arteaga, E., Bressolette, P., Chateauneuf, A., Sánchez-Silva, M., 2009. Probabilistic lifetime assessment of RC structures under coupled corrosion-fatigue deterioration processes. Structural Safety 31, 84 – 96. Bhandari, J., Khan, F., Abbassi, R., Garaniya, V., Ojeda, R., 2015. Modelling of pitting corrosion in marine and offshore steel structures — a technical review. Journal of Loss Prevention in the Process Industries 37, 39 – 62. Chen, Ch., Jie, Z., Wang, K., 2021. Fatigue life evaluation of high-strength steel wires with multiple corrosion pits based on the TCD. Journal of Constructional Steel Research 186, paper 106913. Cheng, H., Hu, C. & Jiang, Y., 2021. Experimental study on fatigue performance of Q420qD high-performance steel cross joint in complex environment. Asian Journal of Civil Engineering 22, 865 – 876. Cui, C., Chen, A., Ma, R., 2020. An improved continuum damage mechanics model for evaluating corrosion – fatigue life of high-strength steel wires in the real service environment. International Journal of Fatigue 135, paper 105540. Erdogan, F., Sih, G.C., 1963. On the crack extension in plates under plane loading and transverse shear. Journal of Basic Engineering 85, 519 – 527. Fatoba, O., Akid, R., 2022. On the behaviour of small fatigue cracks emanating from corrosion pits: Part I – The influence of mechanical factors. Theoretical and Applied Fracture Mechanics 117, paper 103154. Guo, H., Wie. H., Kou, J., Liu, Y., Yang, D., 2021. Mechanical properties test of butt welds of corroded Q690 high strength steel under the coupling of damp-heat cycle dipping. Applied Ocean Research 111, paper 102677. Jiang, C., Wu, C. Jiang, X., 2018. Experimental study on fatigue performance of corroded high-strength steel wires used in bridges. Construction and Building Materials 187, 681 – 690. Malíková, L., Doubek, P., Juhászová, T., Seitl, S., 2022a. Fracture parameters of a perpendicular crack with its tip close to a corrosion pit. Transactions of VSB – Technical University of Ostrava, Civil Engineering Series 22 (2), 30 – 34. Malíková, L., Doubek, P., Juhászová, T., Klusák, J., Seitl, S., 2022b. Interaction of a fatigue crack and a corrosion dimple in a high-strength steel specimen. Procedia Structural Integrity 42, 1082 – 1089. Williams, M.L., 1957. On the stress at the base of a stationary crack. Transactions of ASME. Journal of Applied Mechanics 24(2), 109 – 114. Xu, X., Wang, Y., 2015. Estimating the effects of corrosion pits on the fatigue life of steel plate based on the 3D profile. International Journal of Fatigue 72, 27 – 41. Xue, S., Shen, R., Xue, H., Zhu, X., Wu, Q., Zhang, S., 2021. Failure analysis of high-strength steel wire under random corrosion. Structures 33, 720 – 727. Zheng, Y., Wang, Y., 2020. Damage evolution simulation and life prediction of high-strength steel wire under the coupling of corrosion and fatigue. Corrosion Science 164, paper 108368.