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dc.contributor.authorWagih, A.
dc.contributor.authorLubineau, Gilles
dc.date.accessioned2021-01-11T06:22:32Z
dc.date.available2021-01-11T06:22:32Z
dc.date.issued2020-12-13
dc.date.submitted2020-07-05
dc.identifier.citationWagih, A., & Lubineau, G. (2021). Enhanced mode II fracture toughness of secondary bonded joints using tailored sacrificial cracks inside the adhesive. Composites Science and Technology, 204, 108605. doi:10.1016/j.compscitech.2020.108605
dc.identifier.issn0266-3538
dc.identifier.doi10.1016/j.compscitech.2020.108605
dc.identifier.urihttp://hdl.handle.net/10754/666858
dc.description.abstractThe mode II fracture toughness of secondary bonded joints can be improved by creating tailored sacrificial cracks inside the adhesive. To this end, we inserted a PTFE film inside the adhesive bondline during the bonding process to create sacrificial cracks inside the adhesive. We demonstrated the efficiency of this technique through ENF tests that characterize mode II fracture toughness of adhesive-bonded CFRP adherends. We ascribed the improvement in toughness to the reduction of the strain concentration at the crack tip, which delayed the crack propagation and thus improved joint initiation fracture toughness, GIIi, and the maximum load capacity, Pmax. Moreover, after crack propagation, sacrificial cracks arrested the crack propagation at the upper interface, grew secondary backward cracks at the lower interface, and created adhesive ligaments. These three damage mechanisms dissipated more energy during propagation, which improved the propagation fracture toughness, GIIc. The improvement rates depend on the sacrificial crack width and the gap between two successive cracks reaching 96%, 98%, and 25% for GIIi, GIIc and Pmax, respectively, for a 2 mm sacrificial crack width and 5 mm gap. Our approach works well for both thin and thick adhesives and is a simple technique to substantially enhance the toughness of secondary bonded joints.
dc.description.sponsorshipThis research was funded by King Abdullah University of Science and Technology Office of Sponsored Research (OSR) under award number OSR-2017-CRG6-3388.01.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S026635382032399X
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Composites Science and Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composites Science and Technology, [204, , (2020-12-13)] DOI: 10.1016/j.compscitech.2020.108605 . © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleEnhanced mode II fracture toughness of secondary bonded joints using tailored sacrificial cracks inside the adhesive
dc.typeArticle
dc.contributor.departmentComposite and Heterogeneous Material Analysis and Simulation Laboratory (COHMAS)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalComposites Science and Technology
dc.rights.embargodate2023-01-06
dc.eprint.versionPost-print
dc.identifier.volume204
dc.identifier.pages108605
kaust.personWagih, A.
kaust.personLubineau, Gilles
kaust.grant.numberOSR-2017-CRG6-3388.01
dc.date.accepted2020-12-03
dc.identifier.eid2-s2.0-85098749464
refterms.dateFOA2021-01-11T06:23:28Z
kaust.acknowledged.supportUnitOSR


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