Experimental analysis of crack evolution in concrete by the acoustic emission technique
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....
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2015-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero34/numero_34_art_32.pdf |
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| author | J. Saliba A. Loukili J.P. Regoin D. Grégoire L. Verdon G. Pijaudier-Cabot |
| author_facet | J. Saliba A. Loukili J.P. Regoin D. Grégoire L. Verdon G. Pijaudier-Cabot |
| author_sort | J. Saliba |
| collection | DOAJ |
| description | 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. The
results 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. |
| format | Article |
| id | doaj-art-00a25255a238452eb5c903d8a0c145f9 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2015-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-00a25255a238452eb5c903d8a0c145f92025-01-02T22:37:54ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932015-10-0193430030810.3221/IGF-ESIS.34.32Experimental analysis of crack evolution in concrete by the acoustic emission techniqueJ. Saliba0A. Loukili1J.P. Regoin2D. Grégoire3L. Verdon4G. Pijaudier-Cabot5Université de Bordeaux,FranceLUNAM Universite,FranceLUNAM Universite,FranceUniversité de Pau et Pays Adour,FranceUniversité de Pau et Pays Adour,FranceUniversité de Pau et Pays Adour,FranceThe 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. The results 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.http://www.gruppofrattura.it/pdf/rivista/numero34/numero_34_art_32.pdfConcreteCrackAcoustic Emission techniqueNotch depthUnnotched beams |
| spellingShingle | J. Saliba A. Loukili J.P. Regoin D. Grégoire L. Verdon G. Pijaudier-Cabot Experimental analysis of crack evolution in concrete by the acoustic emission technique Fracture and Structural Integrity Concrete Crack Acoustic Emission technique Notch depth Unnotched beams |
| title | Experimental analysis of crack evolution in concrete by the acoustic emission technique |
| title_full | Experimental analysis of crack evolution in concrete by the acoustic emission technique |
| title_fullStr | Experimental analysis of crack evolution in concrete by the acoustic emission technique |
| title_full_unstemmed | Experimental analysis of crack evolution in concrete by the acoustic emission technique |
| title_short | Experimental analysis of crack evolution in concrete by the acoustic emission technique |
| title_sort | experimental analysis of crack evolution in concrete by the acoustic emission technique |
| topic | Concrete Crack Acoustic Emission technique Notch depth Unnotched beams |
| url | http://www.gruppofrattura.it/pdf/rivista/numero34/numero_34_art_32.pdf |
| work_keys_str_mv | AT jsaliba experimentalanalysisofcrackevolutioninconcretebytheacousticemissiontechnique AT aloukili experimentalanalysisofcrackevolutioninconcretebytheacousticemissiontechnique AT jpregoin experimentalanalysisofcrackevolutioninconcretebytheacousticemissiontechnique AT dgregoire experimentalanalysisofcrackevolutioninconcretebytheacousticemissiontechnique AT lverdon experimentalanalysisofcrackevolutioninconcretebytheacousticemissiontechnique AT gpijaudiercabot experimentalanalysisofcrackevolutioninconcretebytheacousticemissiontechnique |