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Benchmarking of strength models for unidirectional composites under longitudinal tension

Abstract : Several modelling approaches are available in the literature to predict longitudinal tensile failure of fibre-reinforced polymers. However, a systematic, blind and unbiased comparison between the predictions from the different models and against experimental data has never been performed. This paper presents a benchmarking exercise performed for three different models from the literature: (i) an analytical hierarchical scaling law for composite fibre bundles, (ii) direct numerical simulations of composite fibre bundles, and (iii) a multiscale finite-element simulation method. The results show that there are significant discrepancies between the predictions of the different modelling approaches for fibre-break density evolution, cluster formation and ultimate strength, and that each of the three models presents unique advantages over the others. Blind model predictions are also compared against detailed computed-tomography experiments, showing that our understanding of the micromechanics of longitudinal tensile failure of composites needs to be developed further.
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Submitted on : Thursday, June 28, 2018 - 2:48:40 PM
Last modification on : Thursday, September 24, 2020 - 6:30:08 PM

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Anthony R. Bunsell, Larissa Gorbatikh, Hannah Morton, Soraia Pimenta, Ian Sinclair, et al.. Benchmarking of strength models for unidirectional composites under longitudinal tension. Composites Part A: Applied Science and Manufacturing, Elsevier, 2018, 111, pp.138-150. ⟨10.1016/j.compositesa.2018.03.016⟩. ⟨hal-01825602⟩

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