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Characterization of damaged composite laminates using Electronic Speckle Pattern Interferometry (ESPI)
Swerea SICOMP.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
2016 (English)In: ECCM 2016: Proceeding of the 17th European Conference on Composite Materials, European Conference on Composite Materials , 2016Conference paper (Refereed)
Abstract [en]

The degradation of the elastic properties of composite laminates with intralaminar cracks is caused by reduced stress in the damaged layer which is mainly due to two parameters: the crack opening displacement (COD) and the crack sliding displacement (CSD). In this paper these parameters are measured experimentally providing laminate stiffness reduction models with valuable information for validation of used assumptions and for defining limits of their application. In particular, the displacement field on the edges of a [0/ +704/ -704]s glass fiber/epoxy laminate specimens with multiple intralaminar cracks is studied and the COD and CSD dependence on the applied mechanical load is measured. The specimen full-field displacement measurement is carried out using ESPI (Electronic Speckle Pattern Interferometry). By studying the displacement discontinuities, the crack face displacements were measured. A comparison between the COD and the CSD (for the same crack) is performed.

Place, publisher, year, edition, pages
European Conference on Composite Materials , 2016.
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-63256ScopusID: 2-s2.0-85017686439ISBN: 978-3-00-053387-7 (print)OAI: oai:DiVA.org:ltu-63256DiVA: diva2:1093248
Conference
17th European Conference on Composite Materials, Munich, Germany, 26-30th June 2016
Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2017-05-05Bibliographically approved

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