20.500.12556/RUL-177578 Calculation of plastic notch stress intensity factor and strain energy density by Peak Stress Method under low-cycle fatigue conditions In this article, an idea for prediction of low-cycle fatigue durability of notched components is presented. The concept implements the Peak Stress Method into the calculation of both the plastic notch stress intensity factor and averaged elasto-plastic strain energy density. The scatter reduction which is characteristic for the approach using the strain energy density calculation under high-cycle fatigue conditions is less pronounced in the low-cycle fatigue area. Importantly, the otherwise changed slope of the durability curve in the low-cycle fatigue regime of the material remains almost equal to the slope in the high-cycle fatigue regime of the material using the implemented method. The method has been validated on tension–compression testing of plain and V-notched specimens of structural steel St-52 with three notch angles: 35°, 90° and 135°. It is shown that significant agreement can be drawn between predictions using the Peak Stress Method and finite element evaluation of the averaged strain energy density. low-cycle fatigue peak stress method plasticity strain energy density structural steel St-52 malociklično utrujanje metoda konic napetosti plastičnost deformacijska energija konstrukcijsko jeklo true false true Angleški jezik Slovenski jezik Članek v reviji 2025-12-24 11:49:39 2025-12-24 11:49:43 2026-07-03 04:23:20 0000-00-00 00:00:00 2026 0 0 13 str. Vol. 142, art. 105396 Mar. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.178.3:669.1 0167-8442 10.1016/j.tafmec.2025.105396 262910979 1-s2.0-S0167844225005543-main.pdf 1-s2.0-S0167844225005543-main.pdf 1 D52F69DE4F37610D4303894C08BA07E4 9a563513ef4b5627ab2495b3a790e8f18810bf7bfdba807cb518e6a3c63e516b 128a2abd-7624-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236892 https://www.sciencedirect.com/science/article/pii/S0167844225005543 1 cd4c3f62-e0b5-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=224674 Fakulteta za strojništvo 0 0 0