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Effects of Inter-Fiber Spacing on Fiber-matrix Debond Crack Growth in Unidirectional Composites under Transverse Loading
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Texas A&M, College Station; University of Lorraine, France.ORCID iD: 0000-0002-5285-5831
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. SICOMP Swerea.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-9649-8621
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Texas A&M University, College Station, TX .ORCID iD: 0000-0003-1871-4020
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2018 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 109, p. 463-471Article in journal (Refereed) Published
Abstract [en]

The energy release rate (ERR) of a fiber-matrix debond crack in a unidirectional composite subjected to transverse tension is studied numerically. The focus of the study is the effect of the proximity of the neighboring fibers on the ERR. For this, a hexagonal pattern of fibers in the composite cross-section is considered. Assuming one fiber to be debonded at certain initial debond arc-length, the effect of the closeness of the surrounding six fibers on the ERR of the crack is studied with the inter-fiber distance as a parameter. Using an embedded cell consisting of discrete fibers in a matrix surrounded by the homogenized composite, a finite element model and the virtual crack closure technique are used to calculate the ERR. Results show that the presence of the local fiber cluster accelerates the crack growth up to a certain initial crack angle, beyond which the opposite effect occurs. It is also found that the residual stress due to thermal cooldown reduces the ERR. However, the thermal cooldown is found to enhance the debond growth in plies within a cross-ply laminate.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 109, p. 463-471
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-68101DOI: 10.1016/j.compositesa.2018.03.031ISI: 000432508500044Scopus ID: 2-s2.0-85044595517OAI: oai:DiVA.org:ltu-68101DiVA, id: diva2:1193983
Note

Validerad;2018;Nivå 2;2018-04-03 (rokbeg)

Available from: 2018-03-28 Created: 2018-03-28 Last updated: 2018-06-08Bibliographically approved

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Zhuang, LinqiPupurs, AndrejsVarna, JanisTalreja, Ramesh

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