20.500.12556/DKUM-97195 A method for prediction of S-N curve of spot-welded joints based on numerical simulation Currently, ΔF-N curves are often used to predict the fatigue lives of spot-welded joints, but the method for obtaining these ΔF-N curves is time-consuming, laborious, and non-universal. Tensile-shear fatigue tests were performed to obtain the fatigue lives and the corresponding normalized S-N curves of spot-welded joints. Subsequently, the force acting at the spot-welded joints was obtained by extracting the force and moment of the beam element in the shell-element-based finite element model, and the equivalent structural stress at the spot-welded joint was obtained based on the equiva-lent structural stress method. Finally, the S-N curves of the spot-welded joints were fitted using the least-squares method. A comparison of the S-N curves of the spot-welded joints with those of different materials revealed that the material type had a significant influence on the S-N curve. To avoid this influence, a method for predicting the S-N curve of the spot-welded joints was proposed based on the relationship between the ratio of the ten-sile strength and that of the fatigue limit of each material. This research provides guidance for predicting the fatigue life of spot-welded joints in engineering applications. spot-welded joints simulation numerical simulation finite element methods FEM S-N curve prediction method equivalent structural stress točkovno varjeni spoji simulacija true false true Fakulteta za strojništvo, Inštitut za proizvodno strojništvo Angleški jezik Slovenski jezik https://apem-journal.org/index.html Content from this work may be used under the terms of the Creative Commons Attribution 4.0 International Licence (CC BY 4.0). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation, and DOI. Članek v reviji 2026-02-23 12:35:04 2026-02-23 12:35:04 2026-02-24 03:17:38 0000-00-00 00:00:00 2022 0 0 str. 141-151 no. 2 Vol. 17 Jun. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-04-04 2022-08-20 2022-08-31 658.5 269292803 10.14743/apem2022.2.426 1854-6250 APEM17-2_141-151.pdf APEM17-2_141-151.pdf 1 348307787B1ACC422C658C5BFA2C8352 fb9c7ff20a0b677a7bd0b7c57a9dd4057fc0762f526b6908673d6048f7027690 1594b5a5-10ac-11f1-95c9-00155d580e1a https://dk.um.si/Dokument.php?lang=slv&id=203670 Fakulteta za strojništvo Advances in production engineering & management 0 0 0