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  4. Crash and durability of aluminum and mixed steel aluminum joints made by electromagnetic pulse welding
 
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2018
Conference Paper
Titel

Crash and durability of aluminum and mixed steel aluminum joints made by electromagnetic pulse welding

Abstract
In this paper, results of the research project Failure behavior of mixed weld joints under multi-axial crash-like and cyclic loads on the example of EMPT sheet metal joints funded by the German Federal Ministry for Economic Affairs and Energy are presented and discussed. Aluminum and mixed aluminum-steel joints were prepared using electromagnetic pulse technology (EMPT) at PSTproducts GmbH (PST). Investigations on coupon samples were performed under oscillating and monotone (crash) loadings until failure. Based on the coupon tests, parameters for modelling the crash performance were derived, using both a detailed continuum model and an application driven simplified FE-model. The derived FE-modelling concept for crash behavior was validated by comparison of component tests and simulations Durability analysis of the joint specimens was performed combined with FEM analysis, applying the notch stress concept. For the notch stress concept a notch model with a reference radius of rref=0.05 mm was used for the FE-simulations. The endurable notch stresses were compared to reference S-N curves derived for conventional welded samples. The EMPT-results fit well in the scatter band of the conventional laser-welded joints. This is the verification that the notch stress concept can be successfully applied also for EMPT joints.
Author(s)
Huberth, F.
Fraunhofer-Institut für Werkstoffmechanik IWM
Klitschke, S.
Fraunhofer-Institut für Werkstoffmechanik IWM
Gall, M.
Fraunhofer-Institut für Werkstoffmechanik IWM
Sommer, S.
Fraunhofer-Institut für Werkstoffmechanik IWM
Schnabel, K.
Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF
Baumgartner, J.
Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF
Hauptwerk
8th International Conference on High Speed Forming, ICHSF 2018. Online resource
Funder
Bundesministerium für Wirtschaft und Energie BMWi (Deutschland)
Konferenz
International Conference on High Speed Forming (ICHSF) 2018
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DOI
10.17877/DE290R-18961
Externer Link
Externer Link
Language
English
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Fraunhofer-Institut für Werkstoffmechanik IWM
Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF
Tags
  • joining

  • electroforming

  • crash and durability

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