Caractérisation expérimentale et modélisation des interactions entre fissures et perçages multiples à haute température en élastoplasticité généralisée ou confinée

Abstract : The purpose of this study is to investigate crack growth of multi-perforated structures when loading can vary from small scale yielding to large scale yielding conditions. In this study we focus on combustion chambers of aerospace engines. The material used in crack growth tests is the Haynes 188, a cobalt based superalloy, specially developed for this type of applications. Studies on crack growth of multi-perforated structures are often made in small scale yielding conditions. These studies have to be extended to large scale yielding conditions.In order to study interactions between cracks and perforations, an original specimen has been developed. The specimen is perforated in the center by three holes inspired by cooling holes of combustion chambers. Fatigue crack growth tests at 900°C have been conducted with loads from small scale to large scale yielding conditions. These tests were used to study life of a base pattern. Using experimental stresses and strains, tests were modeled at a macroscopic scale with an energy based crack growth model. In order to improve experimental results description, tests were modeled at an intermediate mesoscopic scale using finite element calculations.
Complete list of metadatas

Cited literature [65 references]  Display  Hide  Download

https://pastel.archives-ouvertes.fr/tel-01144411
Contributor : Abes Star <>
Submitted on : Tuesday, April 21, 2015 - 3:47:37 PM
Last modification on : Monday, November 12, 2018 - 10:59:15 AM
Long-term archiving on : Monday, September 14, 2015 - 11:46:54 AM

File

2013ENMP0094.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01144411, version 1

Citation

Flora Salgado Goncalves. Caractérisation expérimentale et modélisation des interactions entre fissures et perçages multiples à haute température en élastoplasticité généralisée ou confinée. Science des matériaux [cond-mat.mtrl-sci]. Ecole Nationale Supérieure des Mines de Paris, 2013. Français. ⟨NNT : 2013ENMP0094⟩. ⟨tel-01144411⟩

Share

Metrics

Record views

380

Files downloads

748