Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS


VOCALIST Sintesi della relazione

Project ID: FIKS-CT-2000-00090
Finanziato nell'ambito di: FP5-EAECTP C
Paese: Germany

Database of features and benchmark test results

Constraint modified specimens, which are the features test specimens as well as regular specimens with shallow cracks and center cracked tension specimens, have been investigated by means of numerical methods to predict the constraint initiated shift in fracture toughness values of the two RPV materials under investigation. Different methods have been applied: the Weibull stress method, the energy method, T-stress and Q-parameter.

It turned out that in principle all methods lead to a correct description of the constraint effect due to crack or specimen geometry for these uniaxially loaded specimens. In some cases the experimental scatter was very large because of a strong variation of crack depths, which has an essential influence on the crack tip constraint at all for the shallow cracks. It makes it difficult to validate the numerical prediction with the experimental results

The analyses and their outcome demonstrate that the tools for prediction of crack tip constraint effects due to different specimen and crack geometries are available and are ready for the application to large scale tests and components.

Informazioni correlate

Reported by

Areva ANP GmbH
Dept. NTM-G, Freyeslebendstrasse 1