20.500.12556/RUL-171166 Evolution control of cyclic softening of Inconel 718 under isothermal low-cycle fatigue loading by improved calculation of accumulated plastic strain In this article, the approach for modelling the stress–strain response of Inconel 718 superalloy under isothermal Low-Cycle Fatigue (LCF) loading using the Prandtl operator approach is improved by introducing an enhanced evolution control of cyclic softening. The proposed improvement consists of an extended calculation of the accumulated plastic strain which now involves an energy conservation step during the calculation. The simulation power of the Prandtl model is especially improved in the area of increasing low plastic strain range magnitudes which are consistently evolving without regard to the variably changing loading regime. The prediction capability of the proposed model is demonstrated especially for block load tests where the highest discrepancies have been observed before the improvement. Evaluation of the agreement between the experimental observations and the simulations shows up to 6 % better agreement using the improved evolution control of cyclic softening. Prandtl operators low-cycle fatigue plasticity nickel-based superalloy Inconel 718 true false true Angleški jezik Ni določen Članek v reviji 2025-08-14 09:41:46 2025-08-14 09:41:52 2025-08-15 03:58:15 0000-00-00 00:00:00 2025 0 0 11 str. pt. A, art. 105583 Vol. 218 Dec. 2025 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2027-07-24 620.178.3:669.018.2 0308-0161 10.1016/j.ijpvp.2025.105583 245631747 Seruga_Evolution_control.pdf Seruga_Evolution_control.pdf 1 12214002563DAF1A53A0DFD7A9A08272 d69c4acf67a82fc310f19b4dddaa7286e73711bc646c2920128fb31ce4231501 a4ee3e9e-78e2-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=214206 https://www.sciencedirect.com/science/article/pii/S030801612500153X 1 10b797d3-78e2-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=214205 Fakulteta za strojništvo 0 0 0