A Coupled Elastoplastic Damage Dynamic Model for Rock
Rock dynamic constitutive model plays an important role in understanding dynamic response and addressing rock dynamic problems. Based on elastoplastic mechanics and damage mechanics, a dynamic constitutive model of rock coupled with elastoplastic damage is established. In this model, unified strengt...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/5567019 |
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| _version_ | 1832549195783864320 |
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| author | Xuelong Hu Ming Zhang Xiangyang Zhang Min Tu Zhiqiang Yin Haifeng Ma Minke Duan |
| author_facet | Xuelong Hu Ming Zhang Xiangyang Zhang Min Tu Zhiqiang Yin Haifeng Ma Minke Duan |
| author_sort | Xuelong Hu |
| collection | DOAJ |
| description | Rock dynamic constitutive model plays an important role in understanding dynamic response and addressing rock dynamic problems. Based on elastoplastic mechanics and damage mechanics, a dynamic constitutive model of rock coupled with elastoplastic damage is established. In this model, unified strength theory is taken as the yield criterion; to reflect the different damage evolution law of rocks under tension and pressure conditions, the effective plastic strain and volumetric plastic strain are used to represent the compressive damage variable and the equivalent plastic strain is used to represent the tensile damage variable; the plastic hardening behavior and strain rate effect of rocks are characterized by piecewise function and dynamic increase factor function, respectively; Fortran language and LS-DYNA User-Defined Interface (Umat) are used to numerically implement the constitutive model; the constitutive model is verified by three classical examples of rock uniaxial and triaxial compression tests, rock uniaxial tensile test, and rock ballistic test. The results show that the constitutive model can describe the dynamic and static mechanical behavior of rock comprehensively. |
| format | Article |
| id | doaj-art-cef98e44aa7c4eb9b2d2761ffa8cd935 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-cef98e44aa7c4eb9b2d2761ffa8cd9352025-02-03T06:12:04ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/55670195567019A Coupled Elastoplastic Damage Dynamic Model for RockXuelong Hu0Ming Zhang1Xiangyang Zhang2Min Tu3Zhiqiang Yin4Haifeng Ma5Minke Duan6State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, ChinaRock dynamic constitutive model plays an important role in understanding dynamic response and addressing rock dynamic problems. Based on elastoplastic mechanics and damage mechanics, a dynamic constitutive model of rock coupled with elastoplastic damage is established. In this model, unified strength theory is taken as the yield criterion; to reflect the different damage evolution law of rocks under tension and pressure conditions, the effective plastic strain and volumetric plastic strain are used to represent the compressive damage variable and the equivalent plastic strain is used to represent the tensile damage variable; the plastic hardening behavior and strain rate effect of rocks are characterized by piecewise function and dynamic increase factor function, respectively; Fortran language and LS-DYNA User-Defined Interface (Umat) are used to numerically implement the constitutive model; the constitutive model is verified by three classical examples of rock uniaxial and triaxial compression tests, rock uniaxial tensile test, and rock ballistic test. The results show that the constitutive model can describe the dynamic and static mechanical behavior of rock comprehensively.http://dx.doi.org/10.1155/2021/5567019 |
| spellingShingle | Xuelong Hu Ming Zhang Xiangyang Zhang Min Tu Zhiqiang Yin Haifeng Ma Minke Duan A Coupled Elastoplastic Damage Dynamic Model for Rock Shock and Vibration |
| title | A Coupled Elastoplastic Damage Dynamic Model for Rock |
| title_full | A Coupled Elastoplastic Damage Dynamic Model for Rock |
| title_fullStr | A Coupled Elastoplastic Damage Dynamic Model for Rock |
| title_full_unstemmed | A Coupled Elastoplastic Damage Dynamic Model for Rock |
| title_short | A Coupled Elastoplastic Damage Dynamic Model for Rock |
| title_sort | coupled elastoplastic damage dynamic model for rock |
| url | http://dx.doi.org/10.1155/2021/5567019 |
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