Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics
Deep brittle rock exhibits characteristics of rapid stress dropping rate and large stress dropping degree after peak failure. To simulate the whole process of deformation and failure of the deep brittle rock under load, the Lemaitre strain equivalent theory is modified to make the damaged part of th...
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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/10.1155/2020/8875029 |
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| author | Fei Li Shuang You Hongguang Ji Hao Wang |
| author_facet | Fei Li Shuang You Hongguang Ji Hao Wang |
| author_sort | Fei Li |
| collection | DOAJ |
| description | Deep brittle rock exhibits characteristics of rapid stress dropping rate and large stress dropping degree after peak failure. To simulate the whole process of deformation and failure of the deep brittle rock under load, the Lemaitre strain equivalent theory is modified to make the damaged part of the rock has residual stress. Based on the damage constitutive model considering residual strength characteristics, a correction factor reflecting stress dropping rate is added, the Weibull distribution is used to describe the inhomogeneity of rock materials, and Drucker–Prager criterion is used to quantitatively describe the influence of stress on damage; a damage constitutive model of deep brittle rock considering stress dropping characteristics is established. According to the geometric features of the rock stress-strain curve, the theoretical expressions of model parameters are derived. To verify the rationality of the model, triaxial compression experiments of deep brittle rock under different confining pressures are conducted. And the influence of model parameters on rock mechanical behaviour is analysed. The results show that the model reflects the stress dropping characteristics of deep brittle rock and the theoretical curve is in good agreement with the experimental results, which indicates that the proposed constitutive model is scientific and feasible. |
| format | Article |
| id | doaj-art-0cb778dc1e96473ab577954adc1af29f |
| 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-0cb778dc1e96473ab577954adc1af29f2025-02-03T01:04:09ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88750298875029Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping CharacteristicsFei Li0Shuang You1Hongguang Ji2Hao Wang3School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, SingaporeDeep brittle rock exhibits characteristics of rapid stress dropping rate and large stress dropping degree after peak failure. To simulate the whole process of deformation and failure of the deep brittle rock under load, the Lemaitre strain equivalent theory is modified to make the damaged part of the rock has residual stress. Based on the damage constitutive model considering residual strength characteristics, a correction factor reflecting stress dropping rate is added, the Weibull distribution is used to describe the inhomogeneity of rock materials, and Drucker–Prager criterion is used to quantitatively describe the influence of stress on damage; a damage constitutive model of deep brittle rock considering stress dropping characteristics is established. According to the geometric features of the rock stress-strain curve, the theoretical expressions of model parameters are derived. To verify the rationality of the model, triaxial compression experiments of deep brittle rock under different confining pressures are conducted. And the influence of model parameters on rock mechanical behaviour is analysed. The results show that the model reflects the stress dropping characteristics of deep brittle rock and the theoretical curve is in good agreement with the experimental results, which indicates that the proposed constitutive model is scientific and feasible.http://dx.doi.org/10.1155/2020/8875029 |
| spellingShingle | Fei Li Shuang You Hongguang Ji Hao Wang Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics Advances in Civil Engineering |
| title | Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics |
| title_full | Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics |
| title_fullStr | Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics |
| title_full_unstemmed | Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics |
| title_short | Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics |
| title_sort | study of damage constitutive model of brittle rocks considering stress dropping characteristics |
| url | http://dx.doi.org/10.1155/2020/8875029 |
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