PSI - Issue 57

Sanjay Gothivarekar et al. / Procedia Structural Integrity 57 (2024) 487–493 S. Gothivarekar et al./ Structural Integrity Procedia 00 (2023) 000 – 000

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The current study introduced an automated modelling framework that generates unique microstructure patterns for a small part of the specimen, where crack initiation is expected. Through detailed stress analysis, it was confirmed that modelling elastic heterogeneity can reproduce a more irregular and realistic stress distribution. Although the standard deviation of the estimated fatigue life was two to three times smaller than the experimental scatter, a clear difference in estimated fatigue life was reproduced. Acknowledgements The authors acknowledge the support of the research group Elooi lab for facilitating the current research. [1] I. Tanaka and H. Yashiki, “Magnetic and mechanical properties of newly developed high -strength nonoriented electrical steel,” Magnetics, IEEE Transactions on, vol. 46, p. 290 – 293, March 2010. [2] L. Du, G. Zhou, J. Liu, W. Shi, Y. Bi, Z. Cheng and H. Xue, “Fatigue cracking characterization of high grade non- oriented electrical steels,” Journal of Wuhan University of Technology-Mater. Sci. Ed., vol. 32, p. 1329 – 1335, 2017. [3] J. A. R. Bomidi, N. Weinzapfel, C.- P. Wang and F. Sadeghi, “Experimental and numerical investigation of fatigue of thin tensile specimen,” International Journal of Fatigue, vol. 44, p. 116 – 130, 2012. [4] D. L. McDowell and F. P. E. Dunne, “Microstructure -sensitive computational modeling of fatigue crack formation,” International Journal of Fatigue, vol. 32, p. 1521 – 1542, 2010. [5] N. Grilli, E. Tarleton and A. C. F. Cocks, “Neper2CAE and PyCiGen: Scripts to generate polycrystals and interface elements in Abaqus,” SoftwareX, vol. 13, p. 100651, 2021. [6] Y.-J. Huang, Y.-J. Chen, L. Mao and Y.- H. Zheng, “Finite Element Rolling Simulation of Pure Copper Plate s in Voronoi Polycrystalline Model,” in Proceedings of the 2015 International Industrial Informatics and Computer Engineering Conference , 2015. [7] G. Glodek, A. Nazabal, I. Llavori and R. Talemi, “Numerical modelling of microstructure inhomogeneity to reproduce experimentally observed scatter in fretting fatigue lifetimes,” Tribology International, vol. 185, 2023. [8] S. Gothivarekar, S. Coppieters, R. Talemi and D. Debruyne, “Effect of bending process on the fatigue behaviour of high strength steel, ” Journal of Constructional Steel Research, vol. 182, 2021. [9] K. N. Smith, T. Topper and P. Watson, “A stress -strain function for the fatigue of metals (stress-strain function for metal fatigue including mean stress effect),” J Materials, vol. 5, p. 767 – 778, January 1970. [10] S. Gothivarekar, S. Coppieters, R. Hojjati Talemi, D. Debruyne and M. Bambach, “The Influence of Post Necking Strain Hardening Behaviour on Fatigue Lifetime Prediction of Cold- Formed High Strength Steel.,” Procedia Manufacturing, vol. 47, p. 1250 – 1256, 2020. References