SNAPBACK INSTABILITY AT CRACK LIGAMENT TEARING AND ITS IMPLICATION FOR FRACTURE MICROMECHANICS

被引：25

作者：

BAZANT, ZP

机构：

[1] Northwestern Univ, Evanston, IL, USA, Northwestern Univ, Evanston, IL, USA

来源：

CEMENT AND CONCRETE RESEARCH | 1987年 / 17卷 / 06期

关键词：

CONCRETE - Crack Propagation;

D O I：

10.1016/0008-8846(87)90083-4

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The microcracking in the fracture process zone ahead of a major crack is assumed to consist, in the initial stage, of a two-dimensional array of small circular (penny-shaped) cracks and, in the terminal stage, of a two-dimensional array of small circular ligaments, all located on the main crack plane. Both cases are solved in three-dimensions according to linear elastic fracture mechanics. The solution is approximate but asymptotically exact both for very small circular cracks and very small circular ligaments. It is shown that when the ligament transmits a force, its final tearing is always characterized by snapback instability, which determines maximum possible displacement due to crack.

引用

页码：951 / 967

页数：17

共 28 条

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