Evaluation of thin film adhesion to a compliant substrate by the analysis of progressive buckling in the fragmentation test

被引：50

作者：

Andersons, J. ^{[1
]}

Tarasovs, S. ^{[1
]}

Leterrier, Y. ^{[2
]}

机构：

[1] Univ Latvia, Inst Polymer Mech, LV-1006 Riga, Latvia

[2] Ecole Polytech Fed Lausanne, Lab Technol Composites & Polymeres, CH-1015 Lausanne, Switzerland

来源：

THIN SOLID FILMS | 2009年 / 517卷 / 06期

关键词：

Adhesion; Coatings; Interfaces; Silicon oxide; COATING FRAGMENTATION; CRACKING; POLYMERS; STRAIN; LAYERS;

D O I：

10.1016/j.tsf.2008.10.072

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The interface toughness of a thin coating/compliant substrate system is estimated based on the evolution Of coating buckle patterns in the fragmentation test. The linear density of coating buckles as a function of applied strain is determined experimentally for a SiOx coating deposited on a polyethylene terephthalate film. A three-dimensional non-linear finite element model is developed to simulate the process of buckle formation in a single narrow coating strip. The elastic energy released during buckling-driven delamination is obtained from the energy balance in the system before and after the buckling event. Both the interface adhesion and the total energy release rate, which includes the plastic dissipation in the substrate during debonding, are evaluated. The apparent interfacial toughness, equal to 15 J/m(2) at the onset of buckling. is found to increase with strain. This is tentatively explained by the probabilistic features of the buckle accumulation process, reflected also in the random locations of buckles evolving towards a log-normal distribution of buckle spacings at high strains. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2007 / 2011

页数：5

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