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Analysis of matrix cracking in GFRP laminates using Raman spectroscopy
Institute of Chemical Engineering and High Temperature Processes.
Luleå tekniska universitet.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
University of Patras.
2007 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 67, no 9, p. 1946-1954Article in journal (Refereed) Published
Abstract [en]

A Raman spectroscopic technique was used to investigate the elastic modulus degradation and the residual strain development in cross-ply and [0/452/0]T glass fibre/epoxy laminates. Glass has a poor Raman signal and, therefore, embedded aramid fibres were used as strain sensors for mapping of the internal strain development within the 0° ply due to matrix cracking in the off-axis ply. The elastic modulus and the residual strain were derived from the changes of the distance between well identified strain "peaks" on the aramid fibres. The elastic modulus reduction and the residual strain development are described by a closed form model. The modulus reduction predictions are accurate, whereas the experimental residual strain is higher than that predicted. Since both phenomena are governed by the same elastic parameters, the discrepancy cannot be explained by purely elastic analysis. Development of inelastic strains in the off-axis layer is suggested as a possible cause

Place, publisher, year, edition, pages
2007. Vol. 67, no 9, p. 1946-1954
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-5571DOI: 10.1016/j.compscitech.2006.10.019ISI: 000246507000020Scopus ID: 2-s2.0-33947388854Local ID: 3b3d6a40-fe24-11db-b19d-000ea68e967bOAI: oai:DiVA.org:ltu-5571DiVA, id: diva2:978445
Note
Validerad; 2007; 20070509 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Varna, Janis

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