A shear constitutive model and experimental demonstration considering dual void portion and solid skeleton portion of rock
文献类型：期刊论文
| 作者 | Xin, Jie; Jiang, Quan; Liu, Qiang; Zheng, Hong; Li, Shaojun |
| 刊名 | ENGINEERING FRACTURE MECHANICS
 |
| 出版日期 | 2023-03-28 |
| 卷号 | 281 |
| ISSN号 | 0013-7944 |
| 关键词 | Shear failure Shear constitutive relation Dual -structure model Physical simulation Cemented paste backfill-rock ? Scale coefficient |
| 英文摘要 | Shear deformation and break is a typical failure phenomenon of engineering rock. Building a constitutive model for rock shearing behaviors is a key issue in stability assessment of geotech-nical engineering. A dual-structure shear constitutive model was developed to reveal the full shearing deformation evolution features of geological material. It was assumed that the rock was composed of void portion and solid skeleton portion. Thus, the macro constitutive relation of rock shearing deformation was established by accumulating the micro voids' shear deformation and solid skeleton deformation. The comparison analysis of four geological materials indicated that the constitutive model can fully characterize the shear deformation and failure evolution process of rock, including the compaction stage, linear elasticity, shear hardening, shear softening, bimodal phenomenon and residual stages. At the micro level, the damage variable (D) evolution of solid skeleton can be divided into three stages: (i) pre-damage stage; (ii) accelerated damage deterioration stage; and (iii) completed damage stage. It was worth paying attention to the Weibull parameters (m, u0), where parameter m reflected the brittle failure characteristics of the rock, and parameter u0 indicated shear peak strain and peak strength of rock. Finally, physical shear experiments for cemented paste backfill-rock were carried out and the bimodal shear failure mechanism was comprehensively analyzed based on the proposed constitutive model. |
| 学科主题 | Mechanics |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000929766300001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34859]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Xin, Jie,Jiang, Quan,Liu, Qiang,et al. A shear constitutive model and experimental demonstration considering dual void portion and solid skeleton portion of rock[J]. ENGINEERING FRACTURE MECHANICS,2023,281. |
| APA | Xin, Jie,Jiang, Quan,Liu, Qiang,Zheng, Hong,&Li, Shaojun.(2023).A shear constitutive model and experimental demonstration considering dual void portion and solid skeleton portion of rock.ENGINEERING FRACTURE MECHANICS,281. |
| MLA | Xin, Jie,et al."A shear constitutive model and experimental demonstration considering dual void portion and solid skeleton portion of rock".ENGINEERING FRACTURE MECHANICS 281(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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