Skip to Main content Skip to Navigation
Theses

MODÉLISATION AVEC LA MÉTHODE X-FEM DE LA PROPAGATION DYNAMIQUE ET DE L'ARRÊT DE FISSURE DE CLIVAGE DANS UN ACIER DE CUVE REP

Benoit Prabel 1
1 DYN - Laboratoire d'études de DYNamique
SEMT - Service d'Etudes Mécaniques et Thermiques : DEN/DM2S/SEMT
Abstract : This PhD thesis is a study of dynamic cleavage crack propagation and arrest in a PWR steel. It is first recalled that a good understanding of phenomena involved in dynamic fracture mechanics implies good experimental data as well as an efficient numerical tool. The eXtended Finite Element Method is implanted in the french software Cast3M. it enables to simulate crack growth without any re-meshing. Two techniques are proposed: the level set functions update on an auxiliary grid, and the non-conforming partitioning integration to avoid fields projection in plasticity case. Experimental fracture tests are performed on three configurations: CT specimen, ring under compression in both mode I and mixed mode. Crack speed is measured. Fractography assign cleavage as responsible of fracture. A propagation model based on the principal stress evaluated at the crack tip is identified. Critical cleavage stress is found to depend on rate of phenomena. This model permits to predict accurately by numerical simulation, the crack behavior which is observed experimentally.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00278939
Contributor : Benoit Prabel <>
Submitted on : Wednesday, May 14, 2008 - 2:04:57 PM
Last modification on : Tuesday, April 28, 2020 - 11:28:09 AM

Identifiers

  • HAL Id : tel-00278939, version 1

Collections

Citation

Benoit Prabel. MODÉLISATION AVEC LA MÉTHODE X-FEM DE LA PROPAGATION DYNAMIQUE ET DE L'ARRÊT DE FISSURE DE CLIVAGE DANS UN ACIER DE CUVE REP. Mécanique [physics.med-ph]. INSA de Lyon, 2007. Français. ⟨tel-00278939⟩

Share

Metrics

Record views

673

Files downloads

3397