MIXED MODE-I AND MODE-II CONNCRETE FRACTURE - AN EXPERIMENTAL-ANALYSIS

Citation
Zk. Guo et al., MIXED MODE-I AND MODE-II CONNCRETE FRACTURE - AN EXPERIMENTAL-ANALYSIS, Journal of applied mechanics, 61(4), 1994, pp. 815-821
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanics
ISSN journal
0021-8936
Volume
61
Issue
4
Year of publication
1994
Pages
815 - 821
Database
ISI
SICI code
0021-8936(1994)61:4<815:MMAMCF>2.0.ZU;2-#
Abstract
The development of the fracture process zone associated with subcritic al crack growth in a three-point bend concrete specimen with an off-ce ntered single-edged precrack was monitored with moire interferometry. The applied load and the crack opening and sliding displacements toget her with a finite element model of the concrete specimen were used to determine the crack closing stress due to aggregate bridging. Under th is mixed-mode fracture, aggregate interlocking increased the crack clo sing stresses in the fracture process zone and hence the load carrying capacity of the concrete specimen. The dissipated energy rate in the fracture process zone also increased with aggregate interlocking.