Damage Constitutive Model of Microcrack Rock under Tension
To investigate the tensile properties of brittle rock with microdamage, an indirect tensile test was conducted. High-speed image acquisition and acoustic emission (AE) were applied to record the process. After the tests, the images were analysed using the digital image correlation (DIC) method to ob...
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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/10.1155/2020/8835305 |
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| _version_ | 1849686474275946496 |
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| author | Huiya Niu Xingyu Zhang Zhigang Tao Manchao He |
| author_facet | Huiya Niu Xingyu Zhang Zhigang Tao Manchao He |
| author_sort | Huiya Niu |
| collection | DOAJ |
| description | To investigate the tensile properties of brittle rock with microdamage, an indirect tensile test was conducted. High-speed image acquisition and acoustic emission (AE) were applied to record the process. After the tests, the images were analysed using the digital image correlation (DIC) method to obtain the stress and strain development of the rock under tension. The damage constitutive model was also developed in this study. Based on known and assumed statistical distributions for microcracks and the theory of fracture and statistical damage, the mechanical properties and failure mechanisms of brittle rock under tension were analysed. The basic statistical parameters of the main cracks in the elements were described, and the damage variable was defined to develop the effective modulus. A constitutive model for microdamage brittle rock-like materials was established based on the effective modulus. Additionally, to describe the crack propagation, a random-direction crack under tension was analysed to calculate the crack-tip stress intensity factor. After applying the basic parameters of the sandstone to the analytical model, the results showed that the analytical model agreed with the experimental results. |
| format | Article |
| id | doaj-art-c5668d1809824a908486ef0d3fd00f98 |
| institution | DOAJ |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-c5668d1809824a908486ef0d3fd00f982025-08-20T03:22:42ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88353058835305Damage Constitutive Model of Microcrack Rock under TensionHuiya Niu0Xingyu Zhang1Zhigang Tao2Manchao He3State Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, No. 16 Qinghua East Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, No. 16 Qinghua East Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, No. 16 Qinghua East Road, Haidian District, Beijing 100083, ChinaState Key Laboratory of Geomechanics & Deep Underground Engineering, China University of Mining & Technology, No. 16 Qinghua East Road, Haidian District, Beijing 100083, ChinaTo investigate the tensile properties of brittle rock with microdamage, an indirect tensile test was conducted. High-speed image acquisition and acoustic emission (AE) were applied to record the process. After the tests, the images were analysed using the digital image correlation (DIC) method to obtain the stress and strain development of the rock under tension. The damage constitutive model was also developed in this study. Based on known and assumed statistical distributions for microcracks and the theory of fracture and statistical damage, the mechanical properties and failure mechanisms of brittle rock under tension were analysed. The basic statistical parameters of the main cracks in the elements were described, and the damage variable was defined to develop the effective modulus. A constitutive model for microdamage brittle rock-like materials was established based on the effective modulus. Additionally, to describe the crack propagation, a random-direction crack under tension was analysed to calculate the crack-tip stress intensity factor. After applying the basic parameters of the sandstone to the analytical model, the results showed that the analytical model agreed with the experimental results.http://dx.doi.org/10.1155/2020/8835305 |
| spellingShingle | Huiya Niu Xingyu Zhang Zhigang Tao Manchao He Damage Constitutive Model of Microcrack Rock under Tension Advances in Civil Engineering |
| title | Damage Constitutive Model of Microcrack Rock under Tension |
| title_full | Damage Constitutive Model of Microcrack Rock under Tension |
| title_fullStr | Damage Constitutive Model of Microcrack Rock under Tension |
| title_full_unstemmed | Damage Constitutive Model of Microcrack Rock under Tension |
| title_short | Damage Constitutive Model of Microcrack Rock under Tension |
| title_sort | damage constitutive model of microcrack rock under tension |
| url | http://dx.doi.org/10.1155/2020/8835305 |
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