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Characterization of damaged composite laminates using Electronic Speckle Pattern Interferometry (ESPI)
Swerea SICOMP.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0001-9649-8621
2016 (Engelska)Ingår i: ECCM 2016: Proceeding of the 17th European Conference on Composite Materials, European Conference on Composite Materials , 2016Konferensbidrag, Publicerat paper (Refereegranskat)
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.

Ort, förlag, år, upplaga, sidor
European Conference on Composite Materials , 2016.
Nationell ämneskategori
Kompositmaterial och -teknik
Forskningsämne
Polymera konstruktionsmaterial
Identifikatorer
URN: urn:nbn:se:ltu:diva-63256Scopus ID: 2-s2.0-85017686439ISBN: 978-3-00-053387-7 (tryckt)OAI: oai:DiVA.org:ltu-63256DiVA, id: diva2:1093248
Konferens
17th European Conference on Composite Materials, Munich, Germany, 26-30th June 2016
Tillgänglig från: 2017-05-05 Skapad: 2017-05-05 Senast uppdaterad: 2017-11-24Bibliografiskt granskad

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Varna, Janis

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