Multi-scale mechanical modeling of Al-steel resistance spot welds

A multi-scale finite element modeling approach was developed to study the deformation and fracture behavior of Al-steel resistance spot welds. First, a micro-scale model was applied to simulate the mechanical responses of the intermetallic compound (IMC) layer having various morphologies and thickne...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2018-09, Vol.735 (C), p.145-153
Main Authors: Chen, Jian, Feng, Zhili, Wang, Hui-Ping, Carlson, Blair E., Brown, Tyson, Sigler, David
Format: Article
Language:English
Subjects:
Al-steel resistance spot welds
Computer simulation
Deformation and fracture
Deformation resistance
Finite element analysis
Finite element method
Finite element modeling
Intermetallic compound
Intermetallic compounds
MATERIALS SCIENCE
Mathematical analysis
Mathematical models
Mechanical properties
Morphology
Multiscale analysis
Predictions
Scale models
Shear strength
Spot welds
Steel alloys
Tension tests
Thickness
Three dimensional models
Welded joints
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Summary:A multi-scale finite element modeling approach was developed to study the deformation and fracture behavior of Al-steel resistance spot welds. First, a micro-scale model was applied to simulate the mechanical responses of the intermetallic compound (IMC) layer having various morphologies and thicknesses under tensile and shear loading conditions. Second, the predicted tensile and shear strength of the IMC layer, that varied along the joint interface per the IMC layer morphology and thickness variation, was then introduced into 3D macro-scale models to predict the overall mechanical performance of weld coupons under coach peel, lap shear and cross-tension testing conditions. The numerical predictions agreed reasonably well with the experimental data.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2018.08.039