Experimental study of the mechanical strength and the failure of multi-sheet, multi-material spot-welded assemblies under pure and combined loading conditions
| Autor: | Fahmi Chaari, Rim Chtourou, Gregory Haugou, Eric Markiewicz, Bassem Zouari, Nicolas Leconte |
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| Přispěvatelé: | Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 (LAMIH), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Centre National de la Recherche Scientifique (CNRS)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Work (thermodynamics)
Materials science Cost effectiveness Physics QC1-999 Multi material 02 engineering and technology Welding [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph] 021001 nanoscience & nanotechnology Tensile shear law.invention 020303 mechanical engineering & transports 0203 mechanical engineering law Mechanical strength Composite material 0210 nano-technology Spot welding |
| Zdroj: | DYMAT 2018-12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading DYMAT 2018-12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, Sep 2018, Arcachon, France. pp.02009, ⟨10.1051/epjconf/201818302009⟩ EPJ Web of Conferences, Vol 183, p 02009 (2018) |
| Popis: | National audience; Resistance Spot Welding (RSW) is widely used in the automotive industry thanks to its production convenience and cost effectiveness. Around four thousands spot welds are indeed employed to assemble the body-in-white. RSW of multiple sheets and combining multiple materials are increasingly realized. The Ultra-High-Strength Steels (UHSS) are particularly well suited for the entire range of structural parts requiring good crash resistance. However, the mechanical strength and the rupture of such new generation of RSW under multi-axial loadings is not yet well studied. The present work investigates the mechanical strength and the failure of a three-sheet spot welded assembly composed of two sheets of UHSS 22MnB5 and a third sheet of mild steel DX54D. An advanced experimental procedure is proposed for testing this assembly in pure and combined (tensile shear modes) modes I/II. Two types of specimen with different sheet thicknesses have been studied. The obtained results are analyzed to investigate the loading angle effect and the assembly configuration effect on the mechanical strength. Failure modes are also studied in relation with the increasing of the loading angle. Finally, the parameters of a macroscopic force-based failure criterion dedicated for FE crash modeling are identified. |
| Databáze: | OpenAIRE |
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