Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China
To obtain the impact mechanical response and establish the dynamic damage constitutive relationship of frozen sandstone at low temperature conditions, the impact test of Cretaceous red sandstone under different temperatures was conducted using a split Hopkinson pressure bar (SHPB) device. According...
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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: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8865013 |
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| _version_ | 1832547806529716224 |
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| author | Lei Wang Hongming Su Yue Qin Shiguan Chen |
| author_facet | Lei Wang Hongming Su Yue Qin Shiguan Chen |
| author_sort | Lei Wang |
| collection | DOAJ |
| description | To obtain the impact mechanical response and establish the dynamic damage constitutive relationship of frozen sandstone at low temperature conditions, the impact test of Cretaceous red sandstone under different temperatures was conducted using a split Hopkinson pressure bar (SHPB) device. According to the characteristics of the stress-strain curves obtained by the test, a constitutive model considering the damage effect, temperature effect, and strain rate effect was established, which was improved by Zhu–Wang–Tang (Z–W–T) constitutive model. It was proved that the fitting curves of constitutive equation were in good agreement with the test curves. The fluctuation amplitude of fitting error was controlled within ±4 MPa. The physical meaning of each parameter of the constitutive model is clear, and most of them are fixed values. The selection range of variable parameters and the related change rules are confirmed, which improves the practicability of constitutive model. The constitutive equation can well describe the nonlinear features of this kind of frozen sandstone under impact loading. It was also found that the constitutive equation was applicable to express the dynamic mechanical properties of rock-like materials such as hard rock, soft rock, frozen soil, raw coal, and concrete. It can be referred to the parameter determination method in this paper to study and determine the parameters, reduce the difficulty of parameter selection, and improve the practicability of the constitutive model and parameters, so as to guide the engineering practice better. |
| format | Article |
| id | doaj-art-c59f1ad147694d259c184e03cfb97ff7 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-c59f1ad147694d259c184e03cfb97ff72025-02-03T06:43:26ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88650138865013Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western ChinaLei Wang0Hongming Su1Yue Qin2Shiguan Chen3College of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaCollege of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaTo obtain the impact mechanical response and establish the dynamic damage constitutive relationship of frozen sandstone at low temperature conditions, the impact test of Cretaceous red sandstone under different temperatures was conducted using a split Hopkinson pressure bar (SHPB) device. According to the characteristics of the stress-strain curves obtained by the test, a constitutive model considering the damage effect, temperature effect, and strain rate effect was established, which was improved by Zhu–Wang–Tang (Z–W–T) constitutive model. It was proved that the fitting curves of constitutive equation were in good agreement with the test curves. The fluctuation amplitude of fitting error was controlled within ±4 MPa. The physical meaning of each parameter of the constitutive model is clear, and most of them are fixed values. The selection range of variable parameters and the related change rules are confirmed, which improves the practicability of constitutive model. The constitutive equation can well describe the nonlinear features of this kind of frozen sandstone under impact loading. It was also found that the constitutive equation was applicable to express the dynamic mechanical properties of rock-like materials such as hard rock, soft rock, frozen soil, raw coal, and concrete. It can be referred to the parameter determination method in this paper to study and determine the parameters, reduce the difficulty of parameter selection, and improve the practicability of the constitutive model and parameters, so as to guide the engineering practice better.http://dx.doi.org/10.1155/2020/8865013 |
| spellingShingle | Lei Wang Hongming Su Yue Qin Shiguan Chen Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China Shock and Vibration |
| title | Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China |
| title_full | Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China |
| title_fullStr | Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China |
| title_full_unstemmed | Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China |
| title_short | Study on Dynamic Constitutive Model of Weakly Consolidated Soft Rock in Western China |
| title_sort | study on dynamic constitutive model of weakly consolidated soft rock in western china |
| url | http://dx.doi.org/10.1155/2020/8865013 |
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