Influence of fracture process zone height on fracture energy of concrete

被引：113

作者：

Hu, XZ ^{[1
]}

Duan, K ^{[1
]}

机构：

[1] Univ Western Australia, Sch Mech Engn, Perth, WA 6009, Australia

来源：

CEMENT AND CONCRETE RESEARCH | 2004年 / 34卷 / 08期

基金：

澳大利亚研究理事会;

关键词：

fracture energy; size effect; boundary effect; ligament effect; fracture process zone;

D O I：

10.1016/j.cemconres.2003.12.027

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The implication of modelling concrete fracture with a fictitious crack of zero fracture process zone (FPZ) height is addressed because FPZ height, in reality, is not zero and is bound to vary during crack growth. The ligament effect on fracture energy G(F) is explained by the nonuniform distribution of a local fracture energy gf showing the influence of specimen boundary and variation of FPZ height. The nonuniform g(f) distribution is then used to determine the size-independent G(F). The recent boundary-effect model based on a bilinear g(f) function is confirmed by the essential work of fracture (EWF) model for the yielding of deeply notched polymer and metal specimens. The EWF model provides a theoretical basis for the bilinear g(f) distribution. The principal rationale of the boundary-effect model, the influence of FPZ height on fracture energy, is supported by experimental observations of thickness effect on fracture toughness of thin polymeric adhesives between metals. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1321 / 1330

页数：10

共 33 条

[1] Determination of size-independent specific fracture energy of concrete from three-point bend and wedge splitting tests [J].

Abdalla, HM ;

Karihaloo, BL .

MAGAZINE OF CONCRETE RESEARCH, 2003, 55 (02) :133-141

[2]

[Anonymous], 1985, MAT STRUCT, V18, P285, DOI [DOI 10.1007/BF02472918, 10.1007/BF00962380, DOI 10.1007/BF00962380]

[3]

Atkins A.F., 1985, ELASTIC PLASTIC FRAC

[4]

BAZANT ZP, 1988, J STRUCT ENG-ASCE, V114, P2493

[5]

Bolander J., 1995, CEMENT CONCRETE COMP, V17, P135

[6]

COTTERELL B, 1977, INT J FRACTURE, V13, P267

[7] MODELING THE FRACTURE OF CEMENTITIOUS MATERIALS [J].

COTTERELL, B ;

PARAMASIVAM, P ;

LAM, KY .

MATERIALS AND STRUCTURES, 1992, 25 (145) :14-20

[8]

CREWS JH, 1988, ASTM STP, V981, P119

[9]

Dowling N.E., 1999, MECH BEHAV MAT

[10] Substrate constraint and adhesive thickness effects on fracture toughness of adhesive joints [J].

Duan, K ;

Hu, XZ ;

Mai, YW .

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 2004, 18 (01) :39-53

← 1 2 3 4 →