The fatigue strength of spot welds in a multi-spot-welded structure is one of the key issues of concern for achieving structural durability and optimum design in automobile industry. In this study, a global-local fatigue life prediction method is proposed to predict the fatigue life of spot welds in multi-spot-welded structures. In this method, the remote stress-strain field away from the spot-welds, calculated from a global coarse finite element model, is assumed to be acceptable, and is used to recover the stress-strain information of the spot-welds. To improve the accuracy of the remote stress-strain field, an 'equivalent' spot weld element is also proposed. The method makes it feasible to predict the fatigue life of spot welds without constructing a detailed finite element model for each spot weld. The method will help reduce finite element model size and save time.
The fatigue life prediction method for multi-spot-welded structures
Ermüdungsfestigkeitsprognosemethode für mehrpunktgeschweißte Konstruktionen
SAE Technical Papers ; 1-10
1993
10 Seiten, 12 Bilder, 2 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
The fatigue life prediction method for multi-spot-welded structures
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