The influence of imperfections on the nucleation and propagation of buckling driven delaminations

被引：156

作者：

Hutchinson, JW ^{[1
]}

He, MY

Evans, AG

机构：

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

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS | 2000年 / 48卷 / 04期

基金：

美国国家科学基金会;

关键词：

buckling; crack propagation and arrest; fracture toughness; coatings; films; finite elements; stability and bifurcation;

D O I：

10.1016/S0022-5096(99)00050-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of prototypical imperfections on the nucleation and propagation stages of delamination of compressed thin films has been analyzed. Energy release rates for separations that develop from imperfections have been calculated, These demonstrate two characteristic quantities: a peak that governs nucleation and a minimum that controls propagation and failure. These quantities lead to two separate criteria that both need to be satisfied to cause failure. They involve a critical film thickness for nucleation and a critical imperfection wavelength for buckling. Implications for the avoidance of failure are discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：709 / 734

页数：26

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