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Transverse crack formation in unidirectional composites by linking of fibre/matrix debond cracks
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Texas A&M University, College Station, TX.ORCID iD: 0000-0002-5285-5831
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Department of Materials Science and Engineering, Texas A&M University, College Station, TX; Department of Aerospace Engineering, Texas A&M University, College Station, TX .ORCID iD: 0000-0003-1871-4020
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
2018 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 107, p. 294-303Article in journal (Refereed) Published
Abstract [en]

Plausible mechanisms of transverse crack formation in unidirectional (UD) composites under applied tension normal to fibres are investigated numerically using a finite element model. Two initial scenarios are considered: Scenario 1 where a pre-existing single fibre/matrix debond crack kinks out into the matrix and induces fibre/matrix debonding at neighbouring fibres, and Scenario 2 where multiple pre-existing debond cracks link up by the debond growth and crack kink-out process. The 2-D finite element model consists of a circular region of matrix with a central fibre surrounded by six fibres in a hexagonal pattern. The region is embedded in a homogenized UD composite of rectangular outer boundary. Energy release rates (ERRs) of interface cracks and kinked-out cracks are calculated under applied tension normal to fibres. Results show that Scenario 2 is more likely to lead to formation of a transverse crack than Scenario 1. These results provide understanding of the roles of fibre clustering and fibre volume fraction on transverse crack formation in composites

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 107, p. 294-303
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-67683DOI: 10.1016/j.compositesa.2018.01.013ISI: 000429892800031Scopus ID: 2-s2.0-85041415496OAI: oai:DiVA.org:ltu-67683DiVA, id: diva2:1183697
Note

Validerad;2018;Nivå 2;2018-02-19 (andbra)

Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-08-16Bibliographically approved

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