1. Multiple cracking under thermal fatigue
- Author
-
Gérard Degallaix, Francis Bouchet, N. Haddar, C. Amzallag, Suzanne Degallaix, V. Maillot, Antoine Fissolo, J. M. Stephan, and J. C. Le Roux
- Subjects
Austenite ,Cracking ,Thermal fatigue ,Materials science ,mental disorders ,Crack initiation ,Metallurgy ,Materials Chemistry ,Metals and Alloys ,Shielding effect ,Physical and Theoretical Chemistry ,Composite material ,Condensed Matter Physics - Abstract
Tests were performed on austenitic stainless steels. In order to investigate thermal fatigue resistance of quasi-structural specimens, test facilities enforcing temperature variations similar to those found under the operative conditions have been developed. Multiple cracking networks similar to those detected during in-service inspections have been reproduced. Experiments and simulations deal with crack initiation and crack growth. In the case of multiple cracking simulation, a Skelton's modelling has been used. A shielding effect between cracks is evidenced. It leads to a dramatic reduction of crack growth rate. Such effect is also crucial for the crack network stability under additional loading.
- Published
- 2004
- Full Text
- View/download PDF