| Issue |
J. Phys. IV France
Volume 06, Number C6, Octobre 1996
EUROMECH - MECAMAT'961st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96' |
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|---|---|---|
| Page(s) | C6-13 - C6-21 | |
| DOI | https://doi.org/10.1051/jp4:1996602 | |
1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'
J. Phys. IV France 06 (1996) C6-13-C6-21
DOI: 10.1051/jp4:1996602
A Numerical Study of the Ductile Tearing in Welded Joints Using the Rice-Tracey Void Growth Model
A. Al Rassis1, 2, A. Imad1, M. Nait Abdelaziz2, G. Mesmacque2, A. Amrouche2 and C. Eripret31 Laboratoire d'Etudes des Structures, Ecole HEI, 13 rue de Toul, 59046 Lille cedex, France
2 Laboratoire de Mécanique de Lille, URA 1441 du CNRS, BP. 179, 59653 Villeneuve dAscq cedex, France
3 Direction des Etudes et Recherches, Département M.T.C., EDF Centre Les Renardières, BP. 1, 77250 Moret-sur-Loing, France
Abstract
A finite element (FE) analysis of a CT25 specimen has been achieved for three configurations of a welded structure : monometallic (base metal), bimetallic (base metal and weld metal) and trimetallic (BM+WM+HAZ). Using the RICE-TRACEY model, a void growth parameter R/R0 has been computed for each case. The evolution of this parameter indicates clearly that the bimetallic specimen is the most harmful while the monometallic case leads to conservative results. Furthermore, a crack propagation analysis, based upon a critical value of the void growth rate, has been performed. Numerical and experimental tearing rates dJ/da are in good agreement but numerical J values are clearly underestimated. Concerning the trimetallic specimen, when analysing the void growth rate distribution around the crack tip, a prediction of crack propagation direction may be possible.
© EDP Sciences 1996