SIZE EFFECTS IN THE MIXED-MODE CRACK-PROPAGATION - SOFTENING AND SNAP-BACK ANALYSIS

被引：105

作者：

BOCCA, P ^{[1
]}

CARPINTERI, A ^{[1
]}

VALENTE, S ^{[1
]}

机构：

[1] POLITECN TORINO, DEPT STRUCT ENGN, I-10129 TURIN, ITALY

来源：

ENGINEERING FRACTURE MECHANICS | 1990年 / 35卷 / 1-3期

关键词：

D O I：

10.1016/0013-7944(90)90193-K

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Strain softening and localization in concrete are described by means of a cohesive crack model. Whereas for mode I, only untying of the finite element nodes is applied to simulate crack growth, for mixed mode interelement crack propagation topological variation is required at each step. In the case of four point shear testing, the load vs deflection diagrams reveal snap-back instability for large sizes. By increasing the specimen sizes, such instability tends to reproduce the classical LEFM instability, predicted by the Maximum Circumferential Stress Criterion. The fracture toughness parameter of concrete appears to be unique and represented by the mode I fracture energy GF or the stress-intensity factor KIC, even for mixed mode problems. © 1990.

引用

页码：159 / 170

页数：12

共 12 条

[1]

Barenblatt GI., 1959, J APPL MATH MECH, V23, P622, DOI 10.1016/0021-8928(59)90157-1

[2]

Bazant Z, 1986, MATER STRUCT, V19, P111, DOI [10.1007/BF02481755, DOI 10.1007/BF02481755]

[3]

CARPINTERI A, 1988, 1988 INT C COMP ENG, P12

[4]

CARPINTERI A, 1985, 1984 NATO ADV RES WO, P284

[5]

CARPINTERI A, 1987, 89FMT RILEM COMM REP

[6]

CARPINTERI A, 1987, 4TH INT C NUM METH F, P369

[7] YIELDING OF STEEL SHEETS CONTAINING SLITS [J].

DUGDALE, DS .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1960, 8 (02) :100-104

[8]

Erdogan F., 1963, J BASIC ENG, V85, P519, DOI DOI 10.1115/1.3656897

[9]

Hillerborg A., 1976, CEMENT CONCRETE RES, V6, P773, DOI DOI 10.1016/0008-8846(76)90007-7

[10]

INGRAFFEA AR, 1985, 1985 SEM FIN EL AN R, P71

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