Numéro
J. Phys. IV France
Volume 06, Numéro C6, Octobre 1996
EUROMECH - MECAMAT'96
1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'
Page(s) C6-315 - C6-323
DOI https://doi.org/10.1051/jp4:1996631
EUROMECH - MECAMAT'96
1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'

J. Phys. IV France 06 (1996) C6-315-C6-323

DOI: 10.1051/jp4:1996631

Prediction of Fracture in the Transition Regime : Application to an A533B Pressure Vessel Steel

C. Eripret1, D.P.G. Lidbury2, A. Sherry2 and I. Howard3

1  Electricité de France, Research Division, Fracture Mechanics Group, Les Renardières Research Centre, 77250 Moret-sur-Loing, France
2  AEA Technology, Structural Performance Department, Risley, Warrington, Cheshire WA3 6AT, U.K.
3  SIRIUS, University of Sheffield, Department of Mechanical and Process Engineering, Mappin Street, Sheffield, S1 3JD, U.K.


Abstract
In order to model the fracture behaviour of pressure vessel steels in the transition regime, a new model has been developped in 1991 at EDF R&D Division in the framework of local approach to fracture. This approach couples the damage mechanics model developped by Rousselier which is accounting for ductile propagation of a crack, and the Beremin's model based on Weibull's statistics which stands for cleavage. It is possible to predict, by this coupled approach, safe lower bound transition curves for a temperature range up to RTNDT+50°C. It has been shown that the predictions of the model agree well with the experimental data, both in terms of fracture toughness at cleavage instability and the amount of pre-cleavage tearing. Those predicted curves have also been compared to the ASME design curve, and substantial safety margins have been exhibited.



© EDP Sciences 1996