A Determination of fracture toughness in plain concrete specimens by R curve
Since the last two centuries, concrete has become the number one building material in the world. Therefore, we are interested in studying the mechanical behavior at failure of this material and calculate its toughness. In this paper, we trace the R-curve to determine the critical stress intensity...
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Gruppo Italiano Frattura
2019-06-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2518 |
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| author | Hamza Chbani Bouchra Saadouki Mostapha Boudlal Mohamed Barakat |
| author_facet | Hamza Chbani Bouchra Saadouki Mostapha Boudlal Mohamed Barakat |
| author_sort | Hamza Chbani |
| collection | DOAJ |
| description | Since the last two centuries, concrete has become the number one building material in the world. Therefore, we are interested in studying the mechanical behavior at failure of this material and calculate its toughness.
In this paper, we trace the R-curve to determine the critical stress intensity factor and the crack evolution by specifying the three stages: crack stopping stage, stable propagation stage and an unstable propagation stage. The R-curve was obtained from the curve connecting the crack mouth opening to the applied load for prismatic specimens normalized by ASTM and notched laterally (SENB). These specimens are made from concrete with 25 MPa compressive strength and subjected to three-point bending. The dimensionless ratio of the initial notch length and the specimen width is between 0.3 and 0.6.
During loading, we can observe an elastic deformation followed by a significant plastic deformation, the average value of the critical stress intensity factor found is 1.05 MPa.m1/2. |
| format | Article |
| id | doaj-art-a6f126742744421aaaad731b0e1c757e |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2019-06-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-a6f126742744421aaaad731b0e1c757e2025-01-03T01:03:06ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932019-06-011349A Determination of fracture toughness in plain concrete specimens by R curveHamza Chbani0Bouchra Saadouki1Mostapha Boudlal2Mohamed Barakat3Laboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, BP 8118 Oasis, Hassan IILaboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, BP 8118 Oasis, Hassan IILaboratory of Control and Mechanical Characterization of Materials and Structures, National Higher School of Electricity and Mechanics, BP 8118 Oasis, Hassan II, MoroccoLaboratory of Mechanics Higher Institute of Maritimes ‘Studies (ISEM), Km 7 Road El Jadida - Casablanca, MoroccoSince the last two centuries, concrete has become the number one building material in the world. Therefore, we are interested in studying the mechanical behavior at failure of this material and calculate its toughness. In this paper, we trace the R-curve to determine the critical stress intensity factor and the crack evolution by specifying the three stages: crack stopping stage, stable propagation stage and an unstable propagation stage. The R-curve was obtained from the curve connecting the crack mouth opening to the applied load for prismatic specimens normalized by ASTM and notched laterally (SENB). These specimens are made from concrete with 25 MPa compressive strength and subjected to three-point bending. The dimensionless ratio of the initial notch length and the specimen width is between 0.3 and 0.6. During loading, we can observe an elastic deformation followed by a significant plastic deformation, the average value of the critical stress intensity factor found is 1.05 MPa.m1/2.https://www.fracturae.com/index.php/fis/article/view/2518ToughnessR-curveCMODSENBThree-point bending |
| spellingShingle | Hamza Chbani Bouchra Saadouki Mostapha Boudlal Mohamed Barakat A Determination of fracture toughness in plain concrete specimens by R curve Fracture and Structural Integrity Toughness R-curve CMOD SENB Three-point bending |
| title | A Determination of fracture toughness in plain concrete specimens by R curve |
| title_full | A Determination of fracture toughness in plain concrete specimens by R curve |
| title_fullStr | A Determination of fracture toughness in plain concrete specimens by R curve |
| title_full_unstemmed | A Determination of fracture toughness in plain concrete specimens by R curve |
| title_short | A Determination of fracture toughness in plain concrete specimens by R curve |
| title_sort | determination of fracture toughness in plain concrete specimens by r curve |
| topic | Toughness R-curve CMOD SENB Three-point bending |
| url | https://www.fracturae.com/index.php/fis/article/view/2518 |
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