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Toughening and Asymmetry in Peeling of Heterogeneous Adhesives

Xia, S. and Ponson, L. and Ravichandran, G. and Bhattacharya, K. (2012) Toughening and Asymmetry in Peeling of Heterogeneous Adhesives. Physical Review Letters, 108 (19). Art. No. 196101. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20120605-104732297

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Abstract

The effective adhesive properties of heterogeneous thin films are characterized through a combined experimental and theoretical investigation. By bridging scales, we show how variations of elastic or adhesive properties at the microscale can significantly affect the effective peeling behavior of the adhesive at the macroscale. Our study reveals three elementary mechanisms in heterogeneous systems involving front propagation: (i) patterning the elastic bending stiffness of the film produces fluctuations of the driving force resulting in dramatically enhanced resistance to peeling; (ii) optimized arrangements of pinning sites with large adhesion energy are shown to control the effective system resistance, allowing the design of highly anisotropic and asymmetric adhesives; (iii) heterogeneities of both types result in front motion instabilities producing sudden energy releases that increase the overall adhesion energy. These findings open potentially new avenues for the design of thin films with improved adhesion properties, and motivate new investigations of other phenomena involving front propagation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.108.196101DOIArticle
http://prl.aps.org/abstract/PRL/v108/i19/e196101PublisherArticle
ORCID:
AuthorORCID
Bhattacharya, K.0000-0003-2908-5469
Additional Information:© 2012 American Physical Society. Received 2 November 2011; revised 20 January 2012; published 7 May 2012. This work was conducted when S. X. and L. P. were at Caltech. We thank J.-B. Leblond, P. Mithal, and A. Rosso for helpful discussions. The financial support from the US National Science Foundation (all authors) and from the European Union through the PhyCrack Marie Curie Fellowship (L. P.) is gratefully acknowledged.
Group:GALCIT
Funders:
Funding AgencyGrant Number
NSFUNSPECIFIED
European Union Marie Curie Fellowship PhyCracksUNSPECIFIED
Classification Code:PACS: 68.35.Np; 62.20.D-; 62.20.mt; 62.20.mm
Record Number:CaltechAUTHORS:20120605-104732297
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120605-104732297
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31814
Collection:CaltechAUTHORS
Deposited By: Aucoeur Ngo
Deposited On:05 Jun 2012 18:34
Last Modified:29 Sep 2016 23:16

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