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1. Valutazione della tenacità di giunti saldati con prove di meccanica della frattura (J, CTOD): criteri di estrapolazione dei risultati ottenuti su provini di medio spessore a giunti di spessore elevato.

Author

Cosso, G. L., Lanza, M., Servetta, C., and Maiorana, E.

Subjects
*WELDED joints, *FRACTURE mechanics, *EXTRAPOLATION, *THICKNESS measurement, *STRENGTH of materials, *ELECTRIC welding, *BRIDGES
Abstract

This article deals with a criterion to extrapolate the frac-ture mechanic test results (CTOD) obtained with medium thickness welded specimens towards thicker joints. The criterion was developed by Italian Institute of Welding (IIS) starting from the available literature correlations between CTOD and J integral and taking into account the results of previous extensive fracture mechanics tests per-formed by IIS on several thicknesses. The criterion was developed within the Stura di Demon-te bridge project (Asti - Cuneo highway) in order to eva-luate the toughness of very thick (140 mm) welds joining the doubling plates of the bridge beams. In particular the extrapolation method allowed to assess the actual joints fracture toughness on the basis of CTOD tests performed on 70 mm thick specimens. [ABSTRACT FROM AUTHOR]

Published
2012

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