Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone
To study the size effect of the fracture toughness of notched semicircular bend (NSCB) specimens, the dimensionless energy release rate equation of the NSCB specimen was deduced on the basis of the Bažant energy release rate. The influence of the crack length and the specimen size on the fracture to...
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| Format: | Article |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/7921694 |
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| author | Sheng Zhang Longfei Wang Mingzhong Gao |
| author_facet | Sheng Zhang Longfei Wang Mingzhong Gao |
| author_sort | Sheng Zhang |
| collection | DOAJ |
| description | To study the size effect of the fracture toughness of notched semicircular bend (NSCB) specimens, the dimensionless energy release rate equation of the NSCB specimen was deduced on the basis of the Bažant energy release rate. The influence of the crack length and the specimen size on the fracture toughness was analyzed. The Bažant scale equation was obtained using the International Union of Laboratories and Experts in Construction Materials, Systems, and Structures (RILEM) method. Finally, the Bažant equation was used to analyze the fracture toughness of an NSCB specimen with a radius of 75 mm, and the degree of variation was predicted. The results show that a longer fracture is correlated with a lower fracture toughness value for the same sample size and that a larger specimen radius is correlated with a higher fracture toughness value for the same crack length. The obtained Bažant equation correctly reflects the scale law of the fracture toughness of the NSCB specimen and provides highly accurate predictions of the fracture toughness of large specimens, with an error of not more than 3%. The results obtained in this study provide a new reference method and theoretical basis for the future testing work. |
| format | Article |
| id | doaj-art-890c41fe995a4d94b790a0e4a76cc461 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-890c41fe995a4d94b790a0e4a76cc4612025-02-03T01:30:37ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/79216947921694Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of LimestoneSheng Zhang0Longfei Wang1Mingzhong Gao2School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454001, ChinaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454001, ChinaInstitute of Deep Earth Sciences and Green Energy, College of Civil Engineering, Shenzhen University, Shenzhen 518060, ChinaTo study the size effect of the fracture toughness of notched semicircular bend (NSCB) specimens, the dimensionless energy release rate equation of the NSCB specimen was deduced on the basis of the Bažant energy release rate. The influence of the crack length and the specimen size on the fracture toughness was analyzed. The Bažant scale equation was obtained using the International Union of Laboratories and Experts in Construction Materials, Systems, and Structures (RILEM) method. Finally, the Bažant equation was used to analyze the fracture toughness of an NSCB specimen with a radius of 75 mm, and the degree of variation was predicted. The results show that a longer fracture is correlated with a lower fracture toughness value for the same sample size and that a larger specimen radius is correlated with a higher fracture toughness value for the same crack length. The obtained Bažant equation correctly reflects the scale law of the fracture toughness of the NSCB specimen and provides highly accurate predictions of the fracture toughness of large specimens, with an error of not more than 3%. The results obtained in this study provide a new reference method and theoretical basis for the future testing work.http://dx.doi.org/10.1155/2019/7921694 |
| spellingShingle | Sheng Zhang Longfei Wang Mingzhong Gao Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone Advances in Civil Engineering |
| title | Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone |
| title_full | Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone |
| title_fullStr | Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone |
| title_full_unstemmed | Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone |
| title_short | Experimental Investigation of the Size Effect of the Mode I Static Fracture Toughness of Limestone |
| title_sort | experimental investigation of the size effect of the mode i static fracture toughness of limestone |
| url | http://dx.doi.org/10.1155/2019/7921694 |
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