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Finite element analysis of contact induced adhesion failure in multilayer coatings with weak interfaces

Lookup NU author(s): Dr Jinju Chen, Professor Steve Bull

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Abstract

Experimental work reveals that the Ag/ZnO interface in the multi layer solar control coatings is weakest and most likely to fail during contact. In this study, a cohesive zone model embedded in a finite element code was used to model delamination in multilayer stack consisting of ZnO/Ag/ZnO on glass during contact. It shows that delamination occurs at the upper ZnO/Ag interface during loading when penetration exceeds a critical value, while, the double pinned buckling delamination failure occurs at the lower Ag/ZnO interface during the unloading cycle. Furthermore, it reveals the model based on mechanism of lateral crack at interface yields reasonably accurate values of interfacial toughness when tensile stress induced delamination occurs during unloading. (C) 2009 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Chen JJ, Bull SJ

Publication type: Article

Publication status: Published

Journal: Thin Solid Films

Year: 2009

Volume: 517

Issue: 13

Pages: 3704-3711

ISSN (print): 0040-6090

ISSN (electronic): 1879-2731

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.tsf.2009.02.121

DOI: 10.1016/j.tsf.2009.02.121


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