SEDL / STP / STP1256-EB / STP16392S

On the Effect of Mismatching on Structural Resistance of Welds

Eripret, C
Mechanical engineer, Electricité de France (EDF), Les Renardieres, Ecuelles

Franco, C
Mechanical engineer and expert, FRAMATOME, Tour Fiat, Paris-La-Défense

Gilles, P
Mechanical engineer and expert, FRAMATOME, Tour Fiat, Paris-La-Défense

Pages: 15    Published: Jan 1995

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Abstract

The usual fracture mechanics based concepts available to assess structural integrity have been developed for homogeneous structures. When considering cracks in welds, these methods assume that cracks are located in a material of uniform properties and neglect any difference of strain carrying capacity due to mismatching effects. The French Cracked Weld Research Programme (FCWRP, conducted by CEA, EDF, and FRAMATOME) has been in progress for the last three years to investigate how the effects of weld metal mismatch may affect structural resistance of welded structures. This paper gives an overview of the conclusions and results drawn from this program.