EFFECTS OF FRACTAL CRACK

被引：24

作者：

XIE, H ^{[1
]}

机构：

[1] ACAD INST CHINA,INST MECH,INT CTR MAT PHYS,SHENYANG,PEOPLES R CHINA

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 1995年 / 23卷 / 03期

关键词：

D O I：

10.1016/0167-8442(95)00025-A

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Experimental results indicate that propagation paths of cracks in geomaterials are often irregular, producing rough fracture surfaces which are fractal. In this paper, crack tip motion along a fractal crack trace is discussed. A fractal kinking model of the crack extension path is established to describe irregular crack growth. The length, velocity and kinking effects of the fractal crack are analysed. A formula is derived to describe the effects of fractal crack propagation on the dynamic stress intensity factor and on crack velocity. Finally, expressions of stress and displacement fields near the fractal crack tip are given.

引用

页码：235 / 244

页数：10

共 40 条

[1] BRANCHING OF A FAST CRACK IN POLYMERS [J].

ARAKAWA, K ;

TAKAHASHI, K .

INTERNATIONAL JOURNAL OF FRACTURE, 1991, 48 (04) :245-254

[2] BROAD BANDWIDTH STUDY OF THE TOPOGRAPHY OF NATURAL ROCK SURFACES [J].

BROWN, SR ;

SCHOLZ, CH .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1985, 90 (B14) :2575-2582

[3] SLIGHTLY CURVED OR KINKED CRACKS [J].

COTTERELL, B ;

RICE, JR .

INTERNATIONAL JOURNAL OF FRACTURE, 1980, 16 (02) :155-169

[4]

Freund LB., 1990, DYNAMIC FRACTURE MEC

[5] SURFACE ROUGHENING AND BRANCHING INSTABILITIES IN DYNAMIC FRACTURE [J].

GAO, HJ .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1993, 41 (03) :457-486

[6] Fractal cracks [J].

Goldshtein, R.V. ;

Mosolov, A.B. .

Journal of Applied Mathematics and Mechanics (English translation of Prikladnaya Matematika i Mekhanika), 1992, 56 (04)

[7] SURFACE-ROUGHNESS INDUCED ATTENUATION AND CHANGES IN THE PROPAGATION VELOCITY OF LONG RAYLEIGH-TYPE WAVES [J].

GOLDSTEIN, RV ;

LEWANDOWSKI, J .

ACTA MECHANICA, 1992, 91 (3-4) :235-243

[8] APPLICABILITY OF FRACTAL CHARACTERIZATION AND MODELING TO ROCK JOINT PROFILES [J].

HUANG, SL ;

OELFKE, SM ;

SPECK, RC .

INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES & GEOMECHANICS ABSTRACTS, 1992, 29 (02) :89-98

[9]

KINLOCH AJ, 1983, FRACTURE BEHAVIOUR P

[10] FRACTAL DIMENSION MEASURED WITH PERIMETER-AREA RELATION AND TOUGHNESS OF MATERIALS [J].

LUNG, CW ;

MU, ZQ .

PHYSICAL REVIEW B, 1988, 38 (16) :11781-11784

← 1 2 3 4 →