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Fiber/matrix debond growth from fiber break in unidirectional composite with local hexagonal fiber clustering
Texas A&M University, US.
RISE, Swerea, SICOMP. Luleå University of Technology, Sweden.
Luleå University of Technology, Sweden.
University of Lorraine, France.
2016 (English)In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 101, p. 124-131Article in journal (Refereed) Published
Abstract [en]

Energy release rate (ERR) for fiber/matrix debonding in composite with local fiber clustering, subjected to axial tension, has been investigated numerically by a 3-D finite element (FE) model. In the model, broken fiber is central in a hexagonal unit which is embedded in an effective composite. Fiber/matrix debond with circular front is assumed to be originated from the fiber break. The effect of the local fiber clustering on ERR is studied by varying distance between the broken fiber and the neighboring fibers. For very short debonds as well as for long debonds (almost steady-state growth) the ERR was calculated by both the J integral and the Virtual Crack Closure Technique (VCCT). Results show that the debond growth is Mode II dominated and that the ERR strongly depends on the angular coordinate. The local fiber clustering has larger effect on the angular variation for shorter debonds and the effect increases with larger local fiber volume fraction. The results obtained from the 3-D hexagonal model are compared with those obtained previously using 5-cylinder axisymmetric model developed by the same authors. The ERR values from 5-cylinder axisymmetric model could be considered as upper bound for the 3-D hexagonal model.

Place, publisher, year, edition, pages
Elsevier Ltd , 2016. Vol. 101, p. 124-131
Keywords [en]
Debonding, Finite element analysis (FEA), Polymer-matrix composites (PMCs), Crack closure, Finite element method, Joints (structural components), Polymer matrix composites, 3-D finite elements, Angular coordinates, Angular variation, Axisymmetric modeling, Fiber volume fractions, Polymer Matrix Composites (PMCs), Unidirectional composites, Virtual crack closure technique, Fibers
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-41012DOI: 10.1016/j.compositesb.2016.07.005Scopus ID: 2-s2.0-84978386989OAI: oai:DiVA.org:ri-41012DiVA, id: diva2:1376980
Available from: 2019-12-10 Created: 2019-12-10 Last updated: 2019-12-10Bibliographically approved

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