Near-tip analysis of crack propagation in cementitious composites

Eduardo B. Pereira, Gregor Fischer, Joaquim A. O. Barros

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The fracture process zone encloses relevant mechanisms which explain the quasi-brittle behavior of cementitious composites. It is an important concept in non-linear fracture mechanics and in the simulation of cracking processes. The use of fibers as reinforcement may alter the crack initiation and propagation processes. A better understanding of the microcracking mechanisms taking place at the level of the fracture process zone is therefore relevant for an optimized design of these materials, as well as for the simulation of their mechanical behavior. In this study, the use of an image analysis procedure to capture the crack initiation and propagation process in concrete and other cementitious composites is described. It utilizes high resolution digital images of the surface of the specimens while undergoing the cracking process to determine the displacement fields. The formed cracks are observed at a relatively small scale, allowing the investigation and analysis of propagating cracks near the crack tip in specimens of concrete and other cementitious composites.
Original languageEnglish
Title of host publication2nd RILEM International conference on Strain Hardening Cementitious Composites (SHCC2-RIO)
Number of pages8
Publication date2011
ISBN (Print)9782351581209
Publication statusPublished - 2011
Event2nd International RILEM Conference on Strain Hardening Cementitious Composites - Rio de Janeiro, Brazil
Duration: 12 Dec 201114 Dec 2011
Conference number: 2

Conference

Conference2nd International RILEM Conference on Strain Hardening Cementitious Composites
Number2
CountryBrazil
CityRio de Janeiro
Period12/12/201114/12/2011
SeriesR I L E M Proceedings
ISSN1461-1147

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