PSI - Issue 68

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Ela Marković et al. / Structural Integrity Procedia 00 (2025) 000–000

Ela Marković et al. / Procedia Structural Integrity 68 (2025) 345 – 350

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to the geometry's nodes via the pseudo-temperature method. Elasto-plastic material properties are approximated for every node based on the corresponding value of hardness, using the empirical expressions provided in the literature. Values of the fatigue parameters needed to calculate the fatigue life are approximated using the hardness method for every node. Fatigue life is then estimated using a strain-life approach from strain amplitudes at every node. The model allows for consecutive analyses on the same geometry, testing the component under different loading conditions. Future developments aim to incorporate various stress concentrators, such as multiple notches or central holes, with experimental validation also planned. Additionally, the model will be extended to account for residual stresses and mean stress effects, as well as scenario in which specimen is surface hardened after the introduction of notches. Acknowledgements Authors wish to gratefully acknowledge support by the Croatian Science Foundation under the project IP-2020 02-5764 and by the University of Rijeka under the projects number uniri-tehnic-18-116 and uniri-iskusni-tehnic-23 302. The work of doctoral student Ela Marković has been fully supported by the “Young researchers’ career development project—training of doctoral students” of the Croatian Science Foundation. References Delale F., Erdogan F., 1982. The Crack Problem for a Nonhomogeneous Plane. Journal of Applied Mechanics 50, 609–614. Gu P., Asaro R.J., 1997. Cracks in functionally graded materials. International Journal of Solids and Structures 34, 1–17. Kurowski P.M., 2017. Finite Element Analysis for Design. SAE International: Warrendale, Pennsylvania, USA. Lang O.R., 1989. Berechnung und Auslegung induktiv randschichtgehärteter Bauteile. 332–348 pp. Li J., Zhang Z., Li C., 2015. An improved method for estimation of Ramberg-Osgood curves of steels from monotonic tensile properties. Fatigue and Fracture of Engineering Materials and Structures 39, 412–426. Lopez Z., Fatemi A., 2012. A method of predicting cyclic stress-strain curve from tensile properties for steels. Materials Science and Engineering A 556, 540–550. Marković E., Basan R., Marohnić T., 2024a. A Novel Algorithm for Optimal Discretization of Stress–Strain Material Curves for Application in Finite Element Analyses. Applied Sciences 14(16) Marković E., Basan R., Srnec Novak J., Žerovnik A., 2024b. Finite element analysis of unnotched and notched functionally graded steel specimens. Procedia Structural Integrity 54, 156–163. Pilkey W.D., 1997. Peterson’s stress concentration factors. 2nd ed. John Wiley & Sons. Roessle M.L., Fatemi A., 2000. Strain-controlled fatigue properties of steels and some simple approximations. International Journal of Fatigue 22, 495–511. Singh P.A., Tailor A., Singh Tumrate C., Mishra D., 2022. Crack growth simulation in a functionally graded material plate with uniformly distributed pores using extended finite element method. Materials Today: Proceedings 60, 602–607. Ansys Inc., 2013. ANSYS Mechanical APDL Basic Analysis Guide. Canonsburg, PA, USA. Aravind V., Adharsh S., Prakash D., Babu K., 2018. Stress analysis on functionally graded spur gear. Springer Singapore. Cordovilla F., García-Beltrán Á., Sancho P., Domínguez J., Ruiz-de-Lara L., Ocaña J.L., 2016. Numerical/experimental analysis of the laser surface hardening with overlapped tracks to design the configuration of the process for Cr-Mo steels. Materials and Design 102, 225–237.