Confinement-induced instability and adhesive failure between dissimilar thin elastic films

When two thin soft elastomeric films are separated from each other, an elastic instability develops at the interface. Although similar instability develops for the case of a soft film separating from a rigid adherent, there are important differences in the two cases. For the single-film case, the wa...

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Bibliographic Details
Published in:The European physical journal. E, Soft matter and biological physics Soft matter and biological physics, 2006-05, Vol.20 (1), p.47-53
Main Authors: CHUNG, J. Y, KIM, K. H, CHAUDHURY, M. K, SARKAR, J, SHARMA, A
Format: Article
Language:English
Subjects:
Adhesives - chemistry
Applied sciences
Elasticity
Elastomers - chemistry
Equipment Failure Analysis
Exact sciences and technology
Materials Testing
Organic polymers
Physicochemistry of polymers
Properties and characterization
Stress, Mechanical
Surface Properties
Tissue Adhesions
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Summary:When two thin soft elastomeric films are separated from each other, an elastic instability develops at the interface. Although similar instability develops for the case of a soft film separating from a rigid adherent, there are important differences in the two cases. For the single-film case, the wavelength of instability is independent of any material properties of the system, and it scales only with thickness of the film. For the two-film case, a co-operative instability mode develops, which is a non-linear function of the thicknesses and the elastic moduli of both films. We investigate the development of such instability by energy minimization procedures. Understanding the nature of this instability is important, as it affects the adhesive compliance of the system and thus the energy release rate in the debonding of soft interfaces.
ISSN:1292-8941
1292-895X
DOI:10.1140/epje/i2005-10080-0