Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion
This paper investigates the unstable fracture toughness of specimens of different heights using the double-K model for three-point bending tests on notched concrete beams. It is shown that unstable fracture toughness exhibits a significant size effect. The modified maximum tangential stress (MMTS) c...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/3986367 |
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| _version_ | 1832560130883846144 |
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| author | Jian Li Zhao-Wen Du Zhong-Ping Guo De-Chun Ai |
| author_facet | Jian Li Zhao-Wen Du Zhong-Ping Guo De-Chun Ai |
| author_sort | Jian Li |
| collection | DOAJ |
| description | This paper investigates the unstable fracture toughness of specimens of different heights using the double-K model for three-point bending tests on notched concrete beams. It is shown that unstable fracture toughness exhibits a significant size effect. The modified maximum tangential stress (MMTS) criterion is used to explain the size effect of unstable fracture toughness. The MMTS criterion considers the higher order terms of the Williams series expansion of the stress field. The results show that the MMTS criterion can reasonably estimate unstable fracture toughness. It is recommended that the minimum height of the specimen be 200 mm when three-point bending tests on notched beams are used to determine unstable fracture toughness. |
| format | Article |
| id | doaj-art-a5fe98a7c092450594c8865c3a59f787 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-a5fe98a7c092450594c8865c3a59f7872025-02-03T01:28:22ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/39863673986367Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) CriterionJian Li0Zhao-Wen Du1Zhong-Ping Guo2De-Chun Ai3College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mining and Civil Engineering, Liupanshui Normal University, Liupanshui 553004, ChinaThis paper investigates the unstable fracture toughness of specimens of different heights using the double-K model for three-point bending tests on notched concrete beams. It is shown that unstable fracture toughness exhibits a significant size effect. The modified maximum tangential stress (MMTS) criterion is used to explain the size effect of unstable fracture toughness. The MMTS criterion considers the higher order terms of the Williams series expansion of the stress field. The results show that the MMTS criterion can reasonably estimate unstable fracture toughness. It is recommended that the minimum height of the specimen be 200 mm when three-point bending tests on notched beams are used to determine unstable fracture toughness.http://dx.doi.org/10.1155/2020/3986367 |
| spellingShingle | Jian Li Zhao-Wen Du Zhong-Ping Guo De-Chun Ai Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion Advances in Civil Engineering |
| title | Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion |
| title_full | Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion |
| title_fullStr | Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion |
| title_full_unstemmed | Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion |
| title_short | Research on the Size Effect of Unstable Fracture Toughness by the Modified Maximum Tangential Stress (MMTS) Criterion |
| title_sort | research on the size effect of unstable fracture toughness by the modified maximum tangential stress mmts criterion |
| url | http://dx.doi.org/10.1155/2020/3986367 |
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