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Damage characterization in glass fiber/epoxy laminates using electronic speckle pattern interferometry
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
Science et Ingénierie des Matériaux et Métallurgie (SI2M), Institut Jean Lamour, Nancy.
2015 (English)In: Experimental techniques (Westport, Conn.), ISSN 0732-8818, E-ISSN 1747-1567, Vol. 39, no 2, p. 38-45Article in journal (Refereed) Published
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
2015. Vol. 39, no 2, p. 38-45
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-9897DOI: 10.1111/ext.12013ISI: 000351440000006Scopus ID: 2-s2.0-84924981891Local ID: 89854988-cdbe-4c6b-a210-47d686d2c325OAI: oai:DiVA.org:ltu-9897DiVA, id: diva2:982836
Note
Validerad; 2015; Nivå 2; 20130111 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Loukil, Mohamed SahbiVarna, Janis

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