Multiple cracking in uniaxial and biaxial fatigue of 304L stainless steel
type: Dataset
description: When a mechanical part is subjected to a repeated mechanical stress, it may be damaged after a number of cycles by several crack initiations and the propagation of a main crack. This is the phenomenon of fatigue damage. The thesis specifically deals with possible damage in some components of nuclear plants due to thermal fatigue. Unlike conventional mechanical fatigue damage where a main crack develops in the part, thermal fatigue damage usually results in the appearance of a network of cracks on its surface. Two aspects are discussed in the thesis. The first is the experimental study of fatigue multiple cracking stage. Two mechanical test campaigns with multicracking detection by digital image correlation were conducted. They involve uniaxial and equibiaxial mechanical loads in tension/compression with no mean stress. This work allows the evolution of different networks of cracks to be monitored and quantified through mechanical loadings. The second is the numerical simulation of the phenomenon of fatigue damage. Three types of models are used (i.e., stochastic, probabilistic, and cohesive elements). The experimental results have led to the identification of a multiple crack initiation law in fatigue, which is compared with the numerical results. This comparison shows the relevance of the use of an analytical probabilistic model to obtain statistical results on the density of cracks that can be initiated with thermal and mechanical fatigue loadings.
landing page: https://theses.hal.science/tel-00777191
identifier: NNT: 2012DENS0047
keyword: correlation-dimages-numeriques
keyword: fatigue-thermique
keyword: infoeu-reposemanticsdoctoralthesis
keyword: micro-fissuration
keyword: modelisation-probabiliste
keyword: multicracking
keyword: multifissuration
keyword: probabilistic-modelisation
keyword: spiotherengineering-sciences-physicsother
keyword: thermal-fatigue
keyword: theses
issued: 2026-05-15T05:43:02.831610
modified: 2026-05-15T05:43:02.831616
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Multiple cracking in uniaxial and biaxial fatigue of 304L stainless steel
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00777191
issued: 2026-05-15T05:43:02.872320
modified: 2026-05-15T05:43:02.810472