ON TOUGHENING BY MICROCRACKS

被引：57

作者：

Shum, David K. M. ^{[1
]}

Hutchinson, John W. ^{[1
]}

机构：

[1] Harvard Univ, Div Appl Sci, Cambridge, MA 02138 USA

来源：

MECHANICS OF MATERIALS | 1990年 / 9卷 / 02期

关键词：

D O I：

10.1016/0167-6636(90)90032-B

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study examines the phenomenon of macrocrack toughening under the premise that toughening must entail mutual shielding of the main crack and the microcracks Maximum toughening corresponds to the macrocrack/microcrack configuration that minimizes the maximum energy release rate (or stress intensity factor) among the vinous crack tips Explicit results for the maximum toughening achievable and the corresponding optimal configuration are presented for a plane strain model of a macrocrack m the presence of either one or two microcracks

引用

页码：83 / 91

页数：9

共 13 条

[1] PRACTICAL LEAST PTH OPTIMIZATION OF NETWORKS [J].

BANDLER, JW ;

CHARALAMBOUS, C .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1972, MT20 (12) :834-840

[2] TOUGHENING OF CERAMICS BY CIRCUMFERENTIAL MICROCRACKING [J].

EVANS, AG ;

FABER, KT .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (07) :394-398

[3]

Gong S, 1989, PHYS, V37, P27

[4] A TREATMENT OF INELASTIC DEFORMATION AROUND A CRACK TIP DUE TO MICROCRACKING [J].

HOAGLAND, RG ;

EMBURY, JD .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1980, 63 (7-8) :404-410

[5] INTERACTING MICRO-CRACKS NEAR THE TIP IN THE PROCESS ZONE OF A MACROCRACK [J].

HORI, M ;

NEMATNASSER, S .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1987, 35 (05) :601-629

[6] CRACK TIP SHIELDING BY MICROCRACKING IN BRITTLE SOLIDS [J].

HUTCHINSON, JW .

ACTA METALLURGICA, 1987, 35 (07) :1605-1619

[7] ELASTIC SOLIDS WITH MANY CRACKS - A SIMPLE METHOD OF ANALYSIS [J].

KACHANOV, M .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 1987, 23 (01) :23-43

[8]

MONTAGUT E, 1988, INT J FRACTURE, V37, pR55

[9] MICROCRACK COALESCENCE AND MACROSCOPIC CRACK-GROWTH INITIATION IN BRITTLE SOLIDS [J].

ORTIZ, M .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 1988, 24 (03) :231-250

[10]

Press W. H., 1992, NUMERICAL RECIPES EX

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