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Influence of surface morphology on the adhesive strength of aluminum/epoxy interfaces

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Title: Influence of surface morphology on the adhesive strength of aluminum/epoxy interfaces
Author(s): Zhang, Sulin; Panat, Rahul P.; Hsia, K. Jimmy
Subject(s): experimental solid mechanics fracture micromechanics plasticity
Abstract: Adhesively bonded aluminum joints have been increasingly used in automotive industry because of their structural and functional advantages. Interfacial debonding in these joints has become a major concern limiting their performance. The present work is focused on experimental investigation of the influence of surface morphology on the interfacial fracture behavior of aluminum/epoxy interface. The specimens used in this experimental study were made of an aluminum/epoxy bimaterial stripe in the form of a layered double cantilever beam (LDCB). The LDCB specimens were debonded by peeling off the epoxy layer from the aluminum substrate using a steel wedge. Interfacial fracture energy was extracted from the debonding length by using a solution for the specimen geometry based on a model of a beam on an elastic foundation. This model was validated by direct finite element analysis. The experimental observations establish a direct correlation between the surface roughness of aluminum substrate and the fracture resistance of the aluminum/epoxy interface. The results emphasize the importance of choosing surface features at an appropriate length scale in studying their effects on interfacial fracture resistance.
Issue Date: 2002-10
Publisher: Department of Theoretical and Applied Mechanics (UIUC)
Citation Info: Published as: Sulin Zhang, Rahul Panat, and K. Jimmy Hsia. Influence of surface morphology on the adhesive strength of aluminum/epoxy interfaces. Journal of Adhesion Science and Technology, 17:12, 1685-1711 (2003). DOI: 10.1163/156856103322396749. Copyright 2003 Brill Academic Publishers.
Series/Report: TAM Reports 1010
Genre: Technical ReportArticle
Type: Text
Language: English
URI: http://hdl.handle.net/2142/278
ISSN: 0073-5264
Publication Status: published or submitted for publication
Peer Reviewed: is peer reviewed
Date Available in IDEALS: 2007-03-08
 

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  • Theoretical and Applied Mechanics (TAM) Technical Reports
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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