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http://dx.doi.org/10.7234/kscm.2008.21.4.007

Interfacial Fracture Toughness Measurement of Composite/metal Bonding  

Kim, Won-Seock (한국과학기술원 기계항공시스템공학과 기계공학 대학원)
Lee, Jung-Ju (한국과학기술원 기계항공시스템공학과 기계공학)
Publication Information
Composites Research / v.21, no.4, 2008 , pp. 7-14 More about this Journal
Abstract
Prediction of the load-bearing capacity of an adhesive-bonded Joint is of practical importance for engineers. This paper introduces interface fracture mechanics approach to predict the load-bearing capacity of composite metal bonded joints. The adhesion strength of composite/steel bonding is evaluated in terms of the energy release rate of an interfacial crack and the fracture toughness of the interface. Virtual track closure technique (VCCT) is used to calculate energy release rates, and hi-material end-notched flexure (ENF) specimens are devised to measure the interfacial fracture toughness. Bi-material ENF specimens gave consistent mode II fracture toughness $(G_{IIc})$ values of the composite/steel interface regardless of the thickness of specimens. The critical energy release rates of double-lap joints showed a good agreement with the measured fracture toughness. Therefore. the energy-based interfacial fracture characterization can be a practical engineering tool for predicting the load-bearing capacity of bonded joints.
Keywords
composite/metal bonding; Fracture mechanics; Interfacial crack;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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