Experimental and analytical investigation on the coupled elastoplastic damage model of coal-rock

被引：2

作者：

Shou, Yundong ^{[1
]}

Zhang, Jianwei ^{[2
]}

Berto, Filippo ^{[3
]}

机构：

[1] Wuhan Univ, Sch Civil Engn, Wuhan, Peoples R China

[2] Chongqing Univ, Sch Civil Engn, Chongqing, Peoples R China

[3] Norwegian Univ Sci & Technol, Trondheim, Norway

来源：

FRATTURA ED INTEGRITA STRUTTURALE | 2020年 / 14卷 / 53期

基金：

中国国家自然科学基金;

关键词：

Coal-rock; Coupled elastoplastic damage model; Damage mechanics; Triaxial compression tests; The deformation prediction of coal-rock; STRESS-STRAIN RELATION; HETEROGENEOUS BRITTLE ROCK; CONSTITUTIVE MODEL; LOCALIZATION; DEFORMATION; COALESCENCE; STRENGTH; MODULI; BEHAVIOR; FLAWS;

D O I：

10.3221/IGF-ESIS.53.34

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, a novel coupled elastoplastic damage model for coal-rock is proposed to predict the deformation and potential disaster in coal mining. The conditions of small deformation and thermodynamic potential are considered, as well as the coupling of damage evolution process with the plastic deformation and the plastic hardening of coal-rock. Based on the theory of damage mechanics, the formulas of damage evolution, plastic yield and plastic potential of coal-rock are deduced theoretically. In addition, triaxial compression tests of coal-rock under the different confining stresses are conducted to reveal the law of deviatoric stress and strain. Based on the experimental data, the control parameters of the coupled elastoplastic damage model of coal-rock are determined. The theoretical results obtained from the coupled elastoplastic damage model for coal-rock agree well with those from the experiment. The proposed model is reasonable to predict the deformation of coal-rock.

引用

页码：434 / 445

页数：12

共 31 条

[1] THE EFFECTIVE MODULI OF CRACKED BODIES IN PLANE DEFORMATIONS [J].