About: Strain Concentration and Fracture at the Impact Site during the Compression of a Carbon/Epoxy Composite

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About: Strain Concentration and Fracture at the Impact Site during the Compression of a Carbon/Epoxy Composite Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.vzlu.cz/cz/transfer-vysledku/clanky-ve-sbornicich-d/
Description	Polymer composite panels are widely used in aeronautic and aerospace structures due to the high strength-to-weight ratios of these structures. A series of compression-after-impact (CAI) tests was performed on a composite made of a carbon-fibre-reinforced epoxy resin matrix. The objective of this study is to determine the strain fields and failure mechanisms during the failure of the impacted composite laminates when subjected to compression. A digital image correlation and fractographic analysis by means of optical and electron microscopy are used for this purpose. The full-field strain measurements indicate a concentrated band of compressive strain near the impact, where buckling occurs. The results indicate that the strain concentration factor can be considered to be a failure criterion. The shear strain visualisation around the impact reveals an area of heterogeneous deformation that is comparable to the detected delamination area acquired by an ultrasonic technique. Fibre and inter-fibre fractures are described for the particular impact site regions. These experiments could improve numerical models for the CAI analyses and help to build a new criterion for this severe failure mode. Polymer composite panels are widely used in aeronautic and aerospace structures due to the high strength-to-weight ratios of these structures. A series of compression-after-impact (CAI) tests was performed on a composite made of a carbon-fibre-reinforced epoxy resin matrix. The objective of this study is to determine the strain fields and failure mechanisms during the failure of the impacted composite laminates when subjected to compression. A digital image correlation and fractographic analysis by means of optical and electron microscopy are used for this purpose. The full-field strain measurements indicate a concentrated band of compressive strain near the impact, where buckling occurs. The results indicate that the strain concentration factor can be considered to be a failure criterion. The shear strain visualisation around the impact reveals an area of heterogeneous deformation that is comparable to the detected delamination area acquired by an ultrasonic technique. Fibre and inter-fibre fractures are described for the particular impact site regions. These experiments could improve numerical models for the CAI analyses and help to build a new criterion for this severe failure mode. (en)
Title	Strain Concentration and Fracture at the Impact Site during the Compression of a Carbon/Epoxy Composite Strain Concentration and Fracture at the Impact Site during the Compression of a Carbon/Epoxy Composite (en)
skos:prefLabel	Strain Concentration and Fracture at the Impact Site during the Compression of a Carbon/Epoxy Composite Strain Concentration and Fracture at the Impact Site during the Compression of a Carbon/Epoxy Composite (en)
skos:notation	RIV/00010669:_____/13:#0001560!RIV14-MPO-00010669
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Kadlec, Martin Kafka, Václav
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Výzkumný a zkušební letecký ústav, a.s.
http://linked.open...dnocenehoVysledku	108079
http://linked.open...ai/riv/idVysledku	RIV/00010669:_____/13:#0001560
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Polymer composite; compression; strain field; impact damage; digital image correlation (en)
http://linked.open.../riv/klicoveSlovo	compression strain field digital image correlation Polymer composite impact damage
http://linked.open...ontrolniKodProRIV	[A481EDF78488]
http://linked.open...v/mistoKonaniAkce	Kos (Greece)
http://linked.open...i/riv/mistoVydani	Kos (Greece)
http://linked.open...i/riv/nazevZdroje	3rd International Conference of Engineering Against Failure (ICEAF III)
http://linked.open...in/vavai/riv/obor	JI
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Kadlec, Martin Kafka, Václav
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2013-06-26 (xsd:date)
number of pages	8 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Laboratory of Technology & Strength of Materials, University of Patras (Greece)
https://schema.org/isbn	978-960-88104-3-3

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