Macro-modeling of the strength and failure of multi-layer multi-steel grade spot welds: Connector formulation, assembly model and identification procedure. (April 2017)

• Record Type: Journal Article
• Authors: Chtourou, Rim; Leconte, Nicolas; Chaari, Fahmi; Haugou, Gregory; Markiewicz, Éric; Zouari, Bassem
• Is Part Of: Thin-walled structures. Volume 113(2017)
• Page Start: 228
• Page End: 239
• Publication Date: 2017-04
• Subjects: Spot weld -- Multi-sheet multi-steel grade assembly -- Macroscopic modeling -- Mechanical behavior -- Sequential identification; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2017.01.023
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: The aim of this paper is to investigate the mechanical strength and the failure of three-sheet multi-steel grade Resistance Spot Welded assemblies (RSW) using experimental and numerical tests. A macroscopic modeling approach, using three connector elements, dedicated to the crashworthiness analysis is therefore proposed. The proposed model involves parameters that have to be set. To simplify and to reduce the optimization problem, direct and inverse identification approaches are proposed. The numerical results are in good agreement with the experimental ones for both pure and combined Arcan tests for the different studied configurations. Abstract : Graphical abstract: Abstract : Highlights: Mechanical behavior of three-sheet multi-material spot welded assembly is investigated using experimental and numerical tests. Macroscopic modeling approach of a three-sheet spot welded assembly is proposed for FE crashworthiness computations. Direct and inverse identification approaches are proposed to identify the model parameters. Numerical results are in good agreement with the experimental ones for both pure and combined Arcan tests.