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Thermo-elastoplastic Model for Soft Rock Considering Effects of Structure and Overconsolidation
Abstract In this study, a critical state-based thermo-elastoplastic model for soft rock is proposed. The model is able to describe the basic mechanical behavior of soft rock such as strain-hardening, strain-softening and the influence of intermediate principal stress, but also temperature dependency with a unified set of parameters. In the model, concepts of subloading and superloading are introduced to describe the influence of overconsolidation and structure on the deformation and strength of soft rock. The influence of intermediate principal stress is also properly taken into consideration by adopting a transformed stress tensor tij. In order to consider the temperature effect, a thermo-induced equivalent stress is proposed to consider the influence of temperature on yield surface, evolution of overconsolidation and structure during shearing. By comparing the calculated results with test results under different loading and temperature conditions, the availability and the accuracy of the proposed model are carefully investigated. Finally, the performance of the proposed model is discussed with a series of parametric studies in detail.
Thermo-elastoplastic Model for Soft Rock Considering Effects of Structure and Overconsolidation
Abstract In this study, a critical state-based thermo-elastoplastic model for soft rock is proposed. The model is able to describe the basic mechanical behavior of soft rock such as strain-hardening, strain-softening and the influence of intermediate principal stress, but also temperature dependency with a unified set of parameters. In the model, concepts of subloading and superloading are introduced to describe the influence of overconsolidation and structure on the deformation and strength of soft rock. The influence of intermediate principal stress is also properly taken into consideration by adopting a transformed stress tensor tij. In order to consider the temperature effect, a thermo-induced equivalent stress is proposed to consider the influence of temperature on yield surface, evolution of overconsolidation and structure during shearing. By comparing the calculated results with test results under different loading and temperature conditions, the availability and the accuracy of the proposed model are carefully investigated. Finally, the performance of the proposed model is discussed with a series of parametric studies in detail.
Thermo-elastoplastic Model for Soft Rock Considering Effects of Structure and Overconsolidation
Xiong, Yong-lin (author) / Yang, Qi-lai (author) / Zhang, Sheng (author) / Ye, Guan-lin (author) / Liu, Gan-bin (author) / Zheng, Rong-yue (author) / Zhang, Feng (author)
2018
Article (Journal)
English
Local classification TIB:
560/4815/6545
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
Thermo-elastoplastic Model for Soft Rock Considering Effects of Structure and Overconsolidation
| Springer Verlag | 2018
Thermo-elastoplastic Model for Soft Rock Considering Effects of Structure and Overconsolidation
| Online Contents | 2018
| British Library Online Contents | 2019