Kuntsche, Ina ; Lange, Jörg
Hrsg.: Swedish Institute of Steel Construction (2024)
Derivation of a plastic strain limit for the finite element analysis of DHY and fillet welds in normal strength steel connections.
15th Nordic Steel Construction Conference (NSCC 2024). Lulea, Schweden (26.06.2024 - 28.06.2024)
doi: 10.5281/zenodo.12379864
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
Complex structural steel connections are nowadays increasingly modelled and calculated with the finite element method. For the modelling of the joint components, two important parts are required. First, the geometry must be captured in a realistic and safe way. Second, a material model described by a material characteristic curve and a plastic strain limit must be inserted. For plates and bolts, the new prEN 1993-1-14 offers some rules concerning the material model. Therein, the plastic strain limit for plates of normal strength steel is set to 5%. Unfortunately, there are no regulations on the material behaviour for welds provided. Since there is no alternative information given, the 5%-limit often is adopted for the maximum permitted plastic strain in the weld elements. This assumption should be questioned critically. In contrast to a plate with a uniform cross section, there is a distinctive notch effect due to the weld geometry, which leads to a complex stress state in the weld area. Furthermore, there is the influence of residual stresses resulting from the rapid heating and cooling during the welding process. To analyse the stress-strain behaviour of a welded joint in more detail, tensile tests were carried out on welded cross-joint specimens with DHY and fillet welds in the research laboratory of the Institute for Steel Construction and Materials Mechanics at the Technical University of Darmstadt. The deformations during the testing were measured by the digital image correlation method. Based on the experimental results and some practical assumptions, a plastic strain limit for welds can be derived.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Kuntsche, Ina ; Lange, Jörg |
| Art des Eintrags: | Bibliographie |
| Titel: | Derivation of a plastic strain limit for the finite element analysis of DHY and fillet welds in normal strength steel connections |
| Sprache: | Englisch |
| Publikationsjahr: | 26 Juni 2024 |
| Ort: | Lulea, Schweden |
| Buchtitel: | Nordic Steel Construction Conference 2024 (NSCC 2024) |
| Kollation: | 10 Seiten |
| Veranstaltungstitel: | 15th Nordic Steel Construction Conference (NSCC 2024) |
| Veranstaltungsort: | Lulea, Schweden |
| Veranstaltungsdatum: | 26.06.2024 - 28.06.2024 |
| DOI: | 10.5281/zenodo.12379864 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Complex structural steel connections are nowadays increasingly modelled and calculated with the finite element method. For the modelling of the joint components, two important parts are required. First, the geometry must be captured in a realistic and safe way. Second, a material model described by a material characteristic curve and a plastic strain limit must be inserted. For plates and bolts, the new prEN 1993-1-14 offers some rules concerning the material model. Therein, the plastic strain limit for plates of normal strength steel is set to 5%. Unfortunately, there are no regulations on the material behaviour for welds provided. Since there is no alternative information given, the 5%-limit often is adopted for the maximum permitted plastic strain in the weld elements. This assumption should be questioned critically. In contrast to a plate with a uniform cross section, there is a distinctive notch effect due to the weld geometry, which leads to a complex stress state in the weld area. Furthermore, there is the influence of residual stresses resulting from the rapid heating and cooling during the welding process. To analyse the stress-strain behaviour of a welded joint in more detail, tensile tests were carried out on welded cross-joint specimens with DHY and fillet welds in the research laboratory of the Institute for Steel Construction and Materials Mechanics at the Technical University of Darmstadt. The deformations during the testing were measured by the digital image correlation method. Based on the experimental results and some practical assumptions, a plastic strain limit for welds can be derived. |
| Zusätzliche Informationen: | Nordic Steel 2024 |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Stahlbau und Werkstoffmechanik 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Institut für Stahlbau und Werkstoffmechanik > Fachgebiet Stahlbau |
| Hinterlegungsdatum: | 27 Jun 2024 06:43 |
| Letzte Änderung: | 01 Jul 2024 06:43 |
| PPN: | 519471709 |
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