PSI - Issue 73

ScienceDirect Structural Integrity Procedia 00 (2025) 000–000 Structural Integrity Procedia 00 (2025) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 73 (2025) 9–13

23rd International Conference on Modelling in Mechanics 2025 Simple design methodology for clinch joint of steel structures 23rd International Conference on Modelling in Mechanics 2025 Simple design methodology for clinch joint of steel structures Jakub Flodr a *, Petr Lehner a , Dominik Gřešica a , Martin Krejsa a a Department of Structural Mechanics, Faculty of Civil Engineering, VSB-Technical University of Ostrava, Ludvika Podeste 1875/17, 708 00 Ostrava-Poruba, Czech Republic Abstract Clinching is a method of joining different metal parts by a process of local deformation without the use of any additional elements. It is very useful for thin-walled steel sections used for load-bearing structures, such as purlins. In this paper, a simplified method of clinch joint verification using an analytical approach is presented. The basic cross section of the clinch connection was considered at the level of identification of geometric and material properties. The assessment of the specimen subjected to shear and tension is presented separately. Example calculations with realistic parameters were prepared for both types. The results were compared with experiments from the research program. This procedure is conservative compared to the experimental results and the load capacity estimates obtained by this procedure are 45% and 26% lower, respectively, than those obtained experimentally. It was thus possible to obtain a sufficiently safe and fast estimate of the clinch joint capacity for engineering calculations. © 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 23rd International Conference on Modelling in Mechanics 2025 organizers Keywords: analytical solutions; clinch technology; steel; thin-walled sections; 1. Introduction The paper focuses on the problem of joining steel structures consisting primarily of cold-formed thin-walled steel sections (Dubina et al., 2013; Tomà et al., 1993). These have been used in the construction industry for a long time and their potential will continue to increase in the future. According to the definition of the current European standard, the category of thin-walled steel elements includes elements with a thickness of less than 3 mm (AISI-S100-12, 2012; Bernuzzi and Maxenti, 2015). The main advantage of cold-formed thin-walled sections is that individual companies can also create automated lines to produce specific thin-walled sections that meet their requirements. As in the past, © 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 event organizers Jakub Flodr a *, Petr Lehner a , Dominik Gřešica a , Martin Krejsa a a Department of Structural Mechanics, Faculty of Civil Engineering, VSB-Technical University of Ostrava, Ludvika Podeste 1875/17, 708 00 Ostrava-Poruba, Czech Republic Abstract Clinching is a method of joining different metal parts by a process of local deformation without the use of any additional elements. It is very useful for thin-walled steel sections used for load-bearing structures, such as purlins. In this paper, a simplified method of clinch joint verification using an analytical approach is presented. The basic cross section of the clinch connection was considered at the level of identification of geometric and material properties. The assessment of the specimen subjected to shear and tension is presented separately. Example calculations with realistic parameters were prepared for both types. The results were compared with experiments from the research program. This procedure is conservative compared to the experimental results and the load capacity estimates obtained by this procedure are 45% and 26% lower, respectively, than those obtained experimentally. It was thus possible to obtain a sufficiently safe and fast estimate of the clinch joint capacity for engineering calculations. © 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 23rd International Conference on Modelling in Mechanics 2025 organizers Keywords: analytical solutions; clinch technology; steel; thin-walled sections; 1. Introduction The paper focuses on the problem of joining steel structures consisting primarily of cold-formed thin-walled steel sections (Dubina et al., 2013; Tomà et al., 1993). These have been used in the construction industry for a long time and their potential will continue to increase in the future. According to the definition of the current European standard, the category of thin-walled steel elements includes elements with a thickness of less than 3 mm (AISI-S100-12, 2012; Bernuzzi and Maxenti, 2015). The main advantage of cold-formed thin-walled sections is that individual companies can also create automated lines to produce specific thin-walled sections that meet their requirements. As in the past,

* Corresponding author. E-mail address: jakub.flodr@vsb.cz * Corresponding author. E-mail address: jakub.flodr@vsb.cz

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 23rd International Conference on Modelling in Mechanics 2025 organizers 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 23rd International Conference on Modelling in Mechanics 2025 organizers

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 event organizers 10.1016/j.prostr.2025.10.002