PSI - Issue 76

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ScienceDirect

Procedia Structural Integrity 76 (2026) 131–137

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the FDMD 2025 chairpersons Keywords: fatigue strength; thin steel plate; splitting technologies; Abstract Many load-bearing components in transport and construction technology are made of sheet metal. The assessment of the fatigue life of such components has its own specificities. The initiation point of fatigue cracks is often the edges that have been formed by splitting from the original sheet metal. The cutting technology significantly affects the condition and properties of the material, as it introduces residual stresses and strain hardening into the material. In this paper, three different low carbon steel sheet materials (S355, S500, S700) will be analyzed. Comparison of the results of cyclic tests of the sheet metal specimens and different cutting technologies (punching, laser cutting, sharp edge, rounded edge) as well as analysis of fatigue crack initiation sites is presented. 1. Introduction It is generally known that the main factors determining the fatigue life of structures or structural elements are the cyclic properties of the material and the stress amplitudes from operational loading [1-4]. Within these main factors, many other influences on fatigue strength have been identified, several of which are integrated into engineering standards for its evaluation [2,5-8]. 5th International Symposium on Fatigue Design and Material Defects FDMD 2025 Influence of manufacturing processes to the fatigue strength of thin steel plates. Vladimír Chmelko a *, Tomáš Koščo a , Miroslava K učerková a , Katarína Jevčáková a , a Slovak University of Technology, Námestie slobody 17, 81231 Bratislava, Slovakia

* Corresponding author. Tel.: +421257296225; E-mail address: vladimir.chmelko@stuba.sk

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the FDMD 2025 chairpersons 10.1016/j.prostr.2025.12.296