Micromechanical modelling of the mechanical properties of a granite under dynamic uniaxial compressive loads

被引：117

作者：

Li, HB

Zhao, J

Li, TJ

机构：

[1] Nanyang Technol Univ, Sch Civil & Struct Engn, Singapore 639798, Singapore

[2] Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES | 2000年 / 37卷 / 06期

关键词：

D O I：

10.1016/S1365-1609(00)00025-3

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A micromechanics-based model is used to study the mechanical properties of a granite under dynamic uniaxial compressive loads. The model is based on interacting sliding cracks uniformly distributed ill the rock material. A dynamic crack growth criterion, which is related to clack growth velocity and dynamic fracture toughness of the rock material? is employed in the analysis. Under dynamic loads at strain rates from 10(-4) to 10(0) s(-1) the crack growth velocity is small compared to the critical crack growth velocity and the effect can be ignored. The strengths of the granite obtained by micromechanical modelling agree with the experimental results. A constitutive relation of the granite is derived from the energy equilibrium equation and correlated with the experimental results. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：923 / 935

页数：13

共 32 条

[11] COMPRESSION-INDUCED MICROCRACK GROWTH IN BRITTLE SOLIDS - AXIAL SPLITTING AND SHEAR FAILURE [J].

HORII, H ;

NEMATNASSER, S .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1985, 90 (NB4) :3105-3125

[12] BRITTLE FAILURE IN COMPRESSION - SPLITTING, FAULTING AND BRITTLE-DUCTILE TRANSITION [J].

HORII, H ;

NEMATNASSER, S .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1986, 319 (1549) :337-374

[13] ROLE OF BULKING IN BRITTLE FAILURE OF ROCKS UNDER RAPID COMPRESSION [J].

JANACH, W .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 1976, 13 (06) :177-186

[14] A MODEL FOR NONLINEAR ROCK DEFORMATION UNDER COMPRESSION DUE TO SUBCRITICAL CRACK-GROWTH [J].

KEMENY, JM .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS, 1991, 28 (06) :459-467

[15] THE EFFECT OF STRAIN RATE ON ROCK STRENGTH [J].

LAJTAI, EZ ;

DUNCAN, EJS ;

CARTER, BJ .

ROCK MECHANICS AND ROCK ENGINEERING, 1991, 24 (02) :99-109

[16] THE ROLE OF TENSILE MICROFRACTURE IN THE STRAIN RATE DEPENDENCE OF COMPRESSIVE STRENGTH OF FINE-GRAINED LIMESTONE - ANALOGY WITH STRONG CERAMICS [J].

LANKFORD, J .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 1981, 18 (02) :173-175

[17] STRAIN-RATE EFFECT ON BRITTLE FAILURE IN COMPRESSION [J].

NEMATNASSER, S ;

DENG, H .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (03) :1013-1024

[18] A MICROCRACK MODEL OF DILATANCY IN BRITTLE MATERIALS [J].

NEMATNASSER, S ;

OBATA, M .

JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, 1988, 55 (01) :24-35

[19] COMPRESSION-INDUCED NONPLANAR CRACK EXTENSION WITH APPLICATION TO SPLITTING, EXFOLIATION, AND ROCKBURST [J].

NEMATNASSER, S ;

HORII, H .

JOURNAL OF GEOPHYSICAL RESEARCH, 1982, 87 (NB8) :6805-6821

[20] THE COMPRESSIVE STRENGTH OF TUFF AS A FUNCTION OF STRAIN RATE FROM 10-6 TO 103/SEC [J].

OLSSON, WA .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 1991, 28 (01) :115-118

← 1 2 3 4 →