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Characterization of damaged composite laminates using Electronic Speckle Pattern Interferometry (ESPI)
RISE, Swerea, SICOMP.
LuleƄ University of Technology, Sweden.
2016 (English)In: ECCM 2016 - Proceeding of the 17th European Conference on Composite Materials, European Conference on Composite Materials, ECCM , 2016Conference paper, Published 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, ECCM , 2016.
Keywords [en]
Crack opening displacement (COD), Damaged laminate, ESPI, FEM, Characterization, Composite materials, Cracks, Finite element method, Interferometry, Laminates, Speckle, Stress intensity factors, Composite laminate, Crack opening displacements, Displacement discontinuity, Electronic speckle pattern interferometry, ESPI (electronic speckle pattern interferometry), Glass fiber/epoxy laminates, Intralaminar cracks, Laminated composites
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-42166Scopus ID: 2-s2.0-85018534770ISBN: 9783000533877 (print)OAI: oai:DiVA.org:ri-42166DiVA, id: diva2:1384318
Conference
17th European Conference on Composite Materials, ECCM 2016, 26 June 2016 through 30 June 2016
Available from: 2020-01-09 Created: 2020-01-09 Last updated: 2020-01-09Bibliographically approved

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