Representative volume elements for discontinuous carbon fibre composites – Part 1: Boundary conditions

Harper, L.T.; Qian, C.; Turner, T.A.; Li, S.; Warrior, N.A.

doi:10.1016/j.compscitech.2011.11.006

Cited by 99 publications

(61 citation statements)

References 41 publications

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“…The bundle deposition algorithm is based on the 2D algorithm developed in [25]. Rectangular fibre bundles of user-specified length and tow size are generated, where bundle widths for each tow size (K) have been derived experimentally [15] (see Table 1).…”

Section: Deposition Algorithmmentioning

confidence: 99%

“…However, this approach overlooks fibre crimping and allows bundle-bundle penetration, as all bundles are deposited on the same plane, reducing accuracy. 2D models also tend to be over-stiff, as intersecting bundles are rigidly bonded at the intersection point [25], which increases as the RVE thickness increases.…”

Section: Introductionmentioning

confidence: 99%

“…Transverse bundle failure is a common failure mode for DFCs under tensile loading due to the significantly weaker transverse properties (70MPa) compared with the longitudinal properties (2893MPa -see Table 3), causing filaments to separate along the longitudinal bundle axis. This is an important failure mode captured by the current model, which is overlooked when representing the bundles as 1D beam elements [7,[22][23][24][25][26].…”

Section: Damage Initiation and Progressionmentioning

confidence: 99%

“…The seed size for the fibre elements was approximately 12% of the measured dry bundle width. Identical values were chosen for the x-y plane of the matrix to maintain a 1:1 fibre to matrix ratio [25]. Following [8], a constant bundle Vf of 60% was used for the present work.…”

Section: Mesh Generationmentioning

confidence: 99%

“…Computation time is therefore one of the primary concerns associated with meso-scale FEA models for DFC materials. 2D models are the most computationally inexpensive option, using 1D linear beam elements to represent fibre bundles randomly distributed in 2D space [7,[22][23][24][25][26]. However, this approach overlooks fibre crimping and allows bundle-bundle penetration, as all bundles are deposited on the same plane, reducing accuracy.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

3D geometric modelling of discontinuous fibre composites using a force-directed algorithm

Harper

Qian

Luchoo

et al. 2016

Journal of Composite Materials

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A geometrical modelling scheme is presented to produce representative architectures for discontinuous fibre composites, enabling downstream modelling of mechanical properties. The model generates realistic random fibre architectures containing high filament count bundles (>3k) and high (~50%) fibre volume fractions. Fibre bundles are modelled as thin shells using a multi-dimension modelling strategy, in which fibre bundles are distributed and compacted to simulate pressure being applied from a matched mould tool. FE simulations are performed to benchmark the in-plane mechanical properties obtained from the numerical model against experimental data, with a detailed study presented to evaluate the tensile properties at various fibre volume fractions and specimen thicknesses. Tensile modulus predictions are in close agreement (less than 5% error) with experimental data at volume fractions below 45%.Ultimate tensile strength predictions are within 4.2% of the experimental data at volume fractions between 40%-55%. This is a significant improvement over existing 2D modelling approaches, as the current model offers increased levels of fidelity, capturing dominant failure mechanisms and the influence of out-of-plane fibres.

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Section: Deposition Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Damage Initiation and Progressionmentioning

confidence: 99%

Section: Mesh Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

3D geometric modelling of discontinuous fibre composites using a force-directed algorithm

Harper

Qian

Luchoo

et al. 2016

Journal of Composite Materials

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The exponential model versus a modified Chamis model and applications to sustainable particulate composites

Anastasiou

2023

J of Applied Polymer Sci

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The Exponential model is introduced to predict the modulus of particulate or short‐fiber reinforced composites. The model allows the prediction of Young's modulus, bending modulus, shear modulus, and bulk modulus in a series of composites from a single experimental point. Subsequently, a modification of the widely used Chamis model is introduced, also allowing the prediction of particulate composite moduli from a single experimental point. The predictions of each model are compared with original experimental data derived from tension tests on sustainable and bio‐based composites, covering common cases of thermosets and thermoplastics, as well as different chemical treatments and sizes of the reinforcing materials, and are plotted against the predictions of the rule of mixtures, the inverse rule of mixtures and the Chamis model. Two different matrices (PLA and Ecopoxy) and six different reinforcements (chemically treated and untreated Luffa cylindrica short fibers, acetylated and untreated cotton flocks, and olive pits of 1–5 μm or 50–150 μm diameter) are used. The comparisons show that both the proposed models are capable of achieving much higher prediction accuracy (2.28–59.51 times less root mean square error) than the three models already in use, and easily adapting to the matrix and/or reinforcement changes.

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Design of short fiber‐reinforced thermoplastic composites: A review

2022

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Short fiber-reinforced thermoplastic (SFRT) composites are drawing increasing academic and industrial interest owing to their outstanding mechanical properties, good economic efficiency, excellent designability, and recyclability. This review primarily introduces several common SFRT manufacturing methods and analyzes their advantages and disadvantages. The stress transfer and damage mechanisms in the SFRT, as well as the effects of the fiber length, fiber volume fraction, fiber orientation, fiber kinds, matrix, and interface, are discussed in depth. The review also discusses the most widely applied rule of mixture for elastic modulus prediction, the Kelly-Tyson model and the Bowyer-Bader model for strength prediction. Overall, this review summarizes the latest research developments on SFRT composites with the aim of providing literary support for their future development.

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Representative volume elements for discontinuous carbon fibre composites – Part 1: Boundary conditions

Cited by 99 publications

References 41 publications

3D geometric modelling of discontinuous fibre composites using a force-directed algorithm

3D geometric modelling of discontinuous fibre composites using a force-directed algorithm

The exponential model versus a modified Chamis model and applications to sustainable particulate composites

Design of short fiber‐reinforced thermoplastic composites: A review

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