Stress concentrations in an impregnated fibre bundle with random fibre packing

Swolfs, Yentl; Gorbatikh, Larissa; Romanov, Valentin; Orlova, S. A.; Lomov, Stepan Vladimirovitch; Verpoest, Ignace

doi:10.1016/j.compscitech.2012.10.013

Cited by 85 publications

(124 citation statements)

References 27 publications

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“…Moreover, the neighbouring fibres will be subjected to stress concentrations and locally take over the additional load caused by the broken fibre [34,35]. These stress concentrations on neighbouring fibres are typically in the range of 5% to 15% [36,37] in the plane of the fibre break, but rapidly decrease with increased distance from this fibre break plane.…”

Section: Failure Developmentmentioning

confidence: 99%

Fibre hybridisation in polymer composites: A review

Swolfs

Gorbatikh

Verpoest

2014

Composites Part A: Applied Science and Manufacturing

668

438

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Fibre-reinforced composites are rapidly gaining market share in structural applications, but further growth is limited by their lack of toughness. Fibre hybridisation is a promising strategy to toughen composite materials. By combining two or more fibre types, these hybrid composites offer a better balance in mechanical properties than non-hybrid composites. Predicting their mechanical properties is challenging due to the synergistic effects between both fibres. This review aims to explain basic mechanisms of these hybrid effects and describes the state-of-the-art models to predict them. An overview of the tensile, flexural, impact and fatigue properties of hybrid composites is presented to aid in optimal design of hybrid composites. Finally, some current trends in fibre hybridisation, such as pseudoductility, are described.

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Section: Failure Developmentmentioning

confidence: 99%

Fibre hybridisation in polymer composites: A review

Swolfs

Gorbatikh

Verpoest

2014

Composites Part A: Applied Science and Manufacturing

668

438

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“…k = 2. However, the true value of k near a cluster of fibre breaks is still an open issue, and depends on local fibre arrangement, size of broken cluster, matrix response and dynamic effects (Accorsi et al, 1996, Beyerlein and Phoenix, 1996b, Hedgepeth, 1961, Mahesh et al, 2002, de Morais, 2001, Nedele and Wisnom, 1994, Swolfs et al, 2013. Therefore, k will be treated as free parameter.…”

Section: Stress Field Around a Fibre Break And Definition Of The Contmentioning

confidence: 99%

Hierarchical scaling law for the strength of composite fibre bundles

Pimenta

Pinho

2013

Journal of the Mechanics and Physics of Solids

112

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This paper presents an analytical model for size effects on the longitudinal tensile strength of composite fibre bundles. The strength of individual fibres is modelled by a Weibull distribution, while the matrix (or fibre-matrix interface) is represented through a perfectly-plastic shear-lag model. A probabilistic analysis of the failure process in hierarchical bundles (bundles of bundles) is performed, so that a scaling law relating the strength distributions and characteristic lengths of consecutive bundle levels is derived. An efficient numerical scheme (based on asymptotic limits) is proposed, hence couponsized bundle strength distributions are obtained almost instantaneously. Parametric studies show that both fibre and matrix properties are critical for bundle strength; model predictions at different scales are validated against experimental results available in the literature.

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“…This section gives a brief overview of the procedure used to calculate stress redistribution after a single fibre break, as previously described in detail in Swolfs et al [43]. The FE model was used to calculate the full stress redistribution around a single broken T700S carbon fibre in a UD composite with a random fibre packing.…”

Section: Finite Element Stress Redistributionmentioning

confidence: 99%

“…Random fibre packings were created with the generator described in [43][44][45], which was extensively validated by Romanov et al [46]. These random packings with a 0.8 x 1 mm cross-section contained 5500 fibres with 55% fibre volume fraction and a length of 1.54 mm.…”

Section: General Descriptionmentioning

confidence: 99%