alexander-effectoftowsize-2018.pdf (958.11 kB)
Download fileEffect of tow size and interface interaction on interfacial shear strength determined by Iosipescu (V-Notch) testing in epoxy resin
journal contribution
posted on 2018-09-19, 00:00 authored by Filip Stojceveski, Andreas Hendlmeier, James Randall, Chantelle Arnold, Melissa Kate Stanfield, Daniel Eyckens, Richard AlexanderRichard Alexander, Luke HendersonLuke HendersonTesting methodologies to accurately quantify interfacial shear strength (IFSS) are essential in order to understand fiber-matrix adhesion. While testing methods at a microscale (single filament fragmentation test-SFFT) and macroscale (Short Beam Shear-SBS) are wide spread, each have their own shortcomings. The Iosipescu (V-notch) tow test offers a mesoscale bridge between the microscale and macroscale whilst providing simple, accurate results with minimal time investment. However, the lack of investigations exploring testing variables has limited the application of Iosipescu testing to only a handful of studies. This paper assesses the effect of carbon fiber tow size within the Iosipescu tow test for epoxy resin. Tow sizes of 3, 6, and 9 k are eminently suitable, while more caution must be shown when examining 12, and 15 k tows. In this work, tows at 18 and 24 k demonstrated failure modes not derived from interfacial failure, but poor fiber wetting. A catalogue of common fracture geometries is discussed as a function of performance for the benefit of future researchers. Finally, a comparison of commercial (T300), amine (T300-Amine), and ethyl ester (T300-Ester) surface modified carbon fibers was conducted. The outcomes of this study showed that the Iosipescu tow test is inherently less sensitive in distinguishing between similar IFSS but provides a more 'real world' image of the carbon fiber-epoxy interface in a composite material.
History
Journal
MaterialsVolume
11Issue
9Pagination
1 - 12Publisher
MDPILocation
Basel, SwitzerlandPublisher DOI
Link to full text
ISSN
1996-1944Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, the authorsUsage metrics
Categories
Keywords
carbon fiberinterfacial shear strengthinterfacial evaluationScience & TechnologyPhysical SciencesTechnologyChemistry, PhysicalMaterials Science, MultidisciplinaryMetallurgy & Metallurgical EngineeringPhysics, AppliedPhysics, Condensed MatterChemistryMaterials SciencePhysicsFIBER-MATRIX ADHESIONCOMPOSITE MECHANICAL-PROPERTIESCARBON-FIBERSELECTROCHEMICAL OXIDATIONLONGITUDINAL 0-DEGREESSURFACE-PROPERTIESSIZING AGENTSTENSILEBEHAVIOR