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On the nature of opaque cylindrical regions formed at fibre break sites in a fragmentation test
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2002 (English)In: Advanced Composites Letters, ISSN 0963-6935, Vol. 11, no 1, 7-13 p.Article in journal (Refereed) Published
Abstract [en]

When a single-fibre composite test is performed to obtain information about the interfacial adhesion in a composite, a gradual strain increase often causes an opaque (black) cylinder to nucleate at, and grow from, the fibre failure sites. The nature of the opaque cylinder is difficult to ascertain using optical microscopy. This is the subject of the present note. To study the inside of the opaque cylinder we use several experimental methods based on imaging the failed region: optical microscopy, laser Raman spectroscopy and scanning electron microscopy. Mechanical models, including FEM analysis and analytic equations based on the shear-lag, approach, are used to discuss the experimental work. The nature and growth mechanism of the opaque cylinder are of importance in defining the parameters and/or contributions that appear in both the force balance and the. energy balance schemes.

Place, publisher, year, edition, pages
2002. Vol. 11, no 1, 7-13 p.
Keyword [en]
fiber-composite test, interfaces, adhesion, energy
Identifiers
URN: urn:nbn:se:kth:diva-21647ISI: 000176479300001OAI: oai:DiVA.org:kth-21647DiVA: diva2:340345
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Berglund, Lars A.

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