Influence of reversed fatigue loading on damage evolution of cross-ply carbon fibre composites

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dc.identifier.uri Just, Gordon Koch, Ilja Brod, Martin Jansen, Eelco Gude, Maik Rolfes, Raimund 2021-02-04T08:11:53Z 2021-02-04T08:11:53Z 2019
dc.identifier.citation Just, G.; Koch, I.; Brod, M.; Jansen, E.; Gude, M. et al.: Influence of reversed fatigue loading on damage evolution of cross-ply carbon fibre composites. In: Materials 12 (2019), Nr. 7, 1153. DOI:
dc.description.abstract Microcrack formation and delamination growth are the main damage mechanisms in the fatigue of composites. They lead to significant stiffness loss, introduce stress concentrations and can be the origin of subsequent damage events like buckling or fibre breakage, especially in case of shear and compression stresses during load reversal. Fatigue experiments of carbon fibre reinforced laminates were conducted at several stress ratios and analysed in terms of crack and delamination growth. These investigations were accompanied by microscopic imaging, digital image correlation and finite element modelling to take into account the effects of residual stresses and crack closure. It was found that residual stresses significantly change the local stress ratio in off-axis layers and lead to residual crack opening of inter fibre cracks. These cracks remain open and close under high compression loadings only. Furthermore, crack formation under pulsating compression loading turned out to be driven by residual stresses leading to perpendicular cracks as observed under pure tension loading. The experimental findings further confirm the severe detrimental effect of tension-compression loading on crack formation and delamination growth compared to pulsating tension-tension or compression-compression loads. eng
dc.language.iso eng
dc.publisher Basel : MDPI AG
dc.relation.ispartofseries Materials 12 (2019), Nr. 7
dc.rights CC BY 4.0 Unported
dc.subject CFRP eng
dc.subject Composite eng
dc.subject Crack growth eng
dc.subject Delamination eng
dc.subject Failure eng
dc.subject Fatigue eng
dc.subject Fracture eng
dc.subject Load reversal eng
dc.subject Microcracking eng
dc.subject Residual stresses eng
dc.subject.ddc 600 | Technik ger
dc.title Influence of reversed fatigue loading on damage evolution of cross-ply carbon fibre composites
dc.type article
dc.type Text
dc.relation.issn 1996-1944
dc.bibliographicCitation.issue 7
dc.bibliographicCitation.volume 12
dc.bibliographicCitation.firstPage 1153
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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