Observing ideal "self-similar" crack growth in experiments

被引：24

作者：

Xia, Kaiwen

Chalivendra, Vijaya B.

Rosakis, Ares J.

机构：

[1] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada

[2] Univ Toronto, Lassonde Inst, Toronto, ON M5S 1A4, Canada

[3] SE Massachusetts Univ, Dept Mech Engn, N Dartmouth, MA 02747 USA

[4] CALTECH, Grad Aeronaut Labs, Pasadena, CA 91125 USA

来源：

ENGINEERING FRACTURE MECHANICS | 2006年 / 73卷 / 18期

关键词：

self-similar crack; spontaneous dynamic fracture; Broberg's problem; dynamic photoelasticity;

D O I：

10.1016/j.engfracmech.2006.05.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We here report on a detailed experimental study whose goal is to investigate spontaneous crack propagation in bonded and intact materials subjected to quasi-static far-field tensile loading. The cracks nucleate from a tiny circular hole and are triggered by an exploding wire. They subsequently propagate under the action of a constant far-field load. Dynamic photoelasticity in conjunction with high speed photography is used to capture the real-time photoelastic fringe patterns (isochromatics) associated with crack propagation. Dynamic stress intensity factors of propagating cracks are determined and the results are successfully compared with Broberg's classical model of self-similar mode-I crack growth. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2748 / 2755

页数：8