SALIBA, Jacqueline; LOUKILI, Ahmed; REGOIN, Jean-Pierre; GRÉGOIRE, David; VERDON, Laura; PIJAUDIER-CABOT, Gilles

doi:10.3221/IGF-ESIS.34.32

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

SALIBA, Jacqueline

LOUKILI, Ahmed
Institut de Recherche en Génie Civil et Mécanique [GeM]

REGOIN, Jean-Pierre
Institut de Recherche en Génie Civil et Mécanique [GeM]

Langue

Article de revue

Ce document a été publié dans

Frattura ed Integrità Strutturale / Fracture and Structural Integrity. 2015-10-01, vol. 34, p. 300-308

Università di Cassino

Résumé en anglais

The fracture process zone (FPZ) was investigated on unnotched and notched beams with different notch depths. Three point bending tests were realized on plain concrete under crack mouth opening displacement (CMOD) control. Crack growth was monitored by applying the acoustic emission (AE) technique. In order to improve our understanding of the FPZ, the width and length of the FPZ were followed based on the AE source locations maps and several AE parameters were studied during the entire loading process. The bvalue analysis, defined as the log-linear slope of the frequency-magnitude distribution of acoustic emissions, was also carried out to describe quantitatively the influence of the relative notch depth on the fracture process. Theresults show that the number of AE hits increased with the decrease of the relative notch depth and an important AE energy dissipation was observed at the crack initiation in unnotched beams. In addition, the relative notch depth influenced the AE characteristics, the process of crack propagation, and the brittleness of concrete.< Réduire

Mots clés en anglais

Concrete

Crack

Acoustic Emission technique

Notch depth

Unnotched beams

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Experimental analysis of crack evolution in concrete by the acoustic emission technique

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche