Experimental characterization of the mechanical behaviour and the failure of multi-sheet and multi-material spot welded assembly. (August 2019)

• Record Type: Journal Article
• Authors: Tounsi, R.; Haugou, G.; Chaari, F.; Leconte, N.; Markiewicz, E.
• Is Part Of: International journal of impact engineering. Volume 130(2019)
• Page Start: 226
• Page End: 238
• Publication Date: 2019-08
• Subjects: Spot welds -- Multi-sheet -- Multi-material -- Experiments -- Dynamic testing; Impact -- Periodicals; Shock (Mechanics) -- Periodicals; Impact -- Périodiques; Choc (Mécanique) -- Périodiques; Impact; Shock (Mechanics); Periodicals; 620.1125
• DOI: 10.1016/j.ijimpeng.2019.04.017
• Languages: English
• ISSNs: 0734-743X

Abstract

Highlights: Mechanical behaviour of three-sheet multi-material spot welded assembly. Pure opening mode, pure shear mode and mixed opening/shear mode. A significant effect of the loading angle on the mechanical behaviour. A pronounced effect of nugget diameter size on the ultimate force and the dissipated energy. Abstract: An experimental investigation of the mechanical behaviour of three-sheet multi-material spot welded assembly is performed. An experimental device based on the Arcan principle is developed to test the three-sheet spot welded specimen under pure opening mode, pure shear mode and mixed opening/shear mode with three nugget sizes. A significant effect of the loading angle is reported and explained by three identified failure modes as a pull-out failure mode (pure opening), an inter-facial failure mode (pure shear) and a mixed pull-out/inter-facial failure mode (mixed opening/shear). A pronounced effect of nugget diameter size is reported on the ultimate force and the dissipated energy. A preliminary study of the strain-rate sensitivity of the three-sheet multi-material spot welded assembly is also undertaken.