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Numerical and experimental analysis of struts joined by electromagnetic forming for aircraft applications
PSYK Verena, LINNEMANN Maik, HENKELMarcel, KRÄUSEL Verena
download PDFAbstract. Joining by electromagnetic forming can provide high-strength connections of tubes and connector parts from different materials. In order to qualify this technology for manufacturing components made of high-strength aluminum alloys typically used in aircraft manufacturing a parameter study was performed on form fit joining of tubes (outer diameter: 70 mm, wall thickness: 1.6 mm) and mandrels (diameter: 66.6 mm) both made of EN AW-2024 (T351). Since some aircraft applications, e. g. the so-called z-struts, which support the passenger floor of the airplane, are related to high axial compressive loads and medium axial tensile loads, this load scenario was considered. In order to increase especially the compressive load-bearing capacity, joint configurations featuring direct support of the tube end via a step or a shoulder of the joining partner were designed and investigated. The axial support can increase the transferable compressive load, while the tensile load remains largely unaffected. Attention must be paid to the gap between tube end and axial support, which cannot be fully avoided due to axial material flow during the electromagnetic joining process. Bending the tube end into a groove providing axial support of the tube end enables compressive load-bearing capacities, which can approximate the strength of the tube material. Here, increasing bending angles improve the load-bearing capacity under tensile force, but reduce the transferable compressive load. Multiple groove configurations can provide acceptable load bearing capacity considering tensile and compressive load. Numerical simulation can predict the general behavior of components joined by electromagnetic forming, help to understand the damage mechanisms of the joint and allow identifying trends for joint design.
Keywords
Electromagnetic Forming, Aluminum, Finite Element Method (FEM)
Published online 4/24/2024, 10 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: PSYK Verena, LINNEMANN Maik, HENKELMarcel, KRÄUSEL Verena, Numerical and experimental analysis of struts joined by electromagnetic forming for aircraft applications, Materials Research Proceedings, Vol. 41, pp 1382-1391, 2024
DOI: https://doi.org/10.21741/9781644903131-153
The article was published as article 153 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] Information on http://www.gmt-gmbh.de
[2] V. Psyk, D. Risch, B.L. Kinsey, A.E. Tekkaya, M. Kleiner, Electromagnetic forming – a review, Journal of Materials Processing Technology 211 (2011) 787-829. https://doi.org/10.1016/j.jmatprotec.2010.12.012
[3] G.W. Harvey, D. Brower, U.S. Patent 2,976,907. (1961).
[4] S.F. Golovashchenko, Material formability and coil design in electromagnetic forming, Journal of Materials Engineering and Performance 16 (2007) 314-320. https://doi.org/10.1007/s11665-007-9058-7
[5] M. Kleiner, M. Marré, C. Beerwald, W. Homberg, D. Löhe, P. Barreiro, V. Schulze, Investigation of force-fit joints produced by electromagnetic tube compression, Annals of the German Academic Society for Production Engineering WGP 13 (2006) 227-230.
[6] M. Geier, E. Paese, R. Rossi, P. A. R. Rosa, R. P. Homrich, Experimental Analysis of Interference-Fit Joining of Aluminum Tubes by Electromagnetic Forming, IEEE Transactions on Applied Superconductivity 30 (2020). https://doi.org/10.1109/TASC.2020.2972499
[7] C. Weddeling, S. T. Woodward, M. Marré, J. Nellesen, V. Psyk, A. E. Tekkaya, W. Tillmann, Influence of groove characteristics on strength of form-fit joints, Journal of Materials Processing Technology 211 (2011) 925-935. https://doi.org/10.1016/j.jmatprotec.2010.08.004
[8] Y.B. Park, H.Y. Kim, S.I. Oh, Design of axial/torque joint made by electromagnetic forming, Thin-Walled Structures 43 (2005) 826-844. https://doi.org/10.1016/j.tws.2004.10.009
[9] R.N. Raoelison, D. Racine, Z. Zhang, N. Buiron, D. Marceau, M. Rachik, Magnetic pulse welding: Interface of Al/Cu joint and investigation of intermetallic formation effect on the weld features, Journal of Manufacturing Processes 16 (2014) 427-434. https://doi.org/10.1016/j.jmapro.2014.05.002
[10] H. Yu, Z. Xu, Z. Fan, Z. Zhao, C. Li, Mechanical property and microstructure of aluminum alloy-steel tubes joint by magnetic pulse welding, Materials Science & Engineering: A 561 (2013) 259-265. https://doi.org/10.1016/j.msea.2012.11.015
[11] V. Psyk, M. Linnemann, M. Henkel, V. Kräusel, M. Dix, Joint design for strut connections in airplane structures produced by electromagnetic forming, Proceedings of the 14th International Conference on the Technology of Plasticity – Current Trends in the Technology of Plasticity (2023) 149-156. https://doi.org/10.1007/978-3-031-41341-4_16
[12] P. L’Eplattenier, G. Cook, C. Ashcraft, M. Burger, J. Imbert, M. Worswick, Introduction of an electromagnetism module in LS‐DYNA for coupled mechanical‐thermal‐electromagnetic simulations, Steel Research International 80 (2009) 351-358. https://doi.org/10.2374/SRI08SP152
[13] Psyk. V, Prozesskette Krümmen – Elektromagnetisch Komprimieren – Innenhochdruck-umformen für Rohre und profilförmige Bauteile, PhD Thesis, TU-Dortmund, 2009.
[14] Reuther. F, Mosel. A, Freytag. P, Lambarri. J, Degenkolb. L, Werner. M, Winter. S, Numerical and experimental investigations for hot metal gas forming of stainless steel X2CrTiNb18, Procedia Manufacturing 27 (2019) 112-117. https://doi.org/10.1016/j.promfg.2018.12.052
