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.

文献中提供了几种建模方法来预测纤维增强聚合物的纵向拉伸破坏。但是，从未对不同模型的预测与实验数据进行系统，盲目和公正的比较。本文介绍了针对文献中的三种不同模型进行的基准测试：（i）复合纤维束的层次分析定律，（ii）复合纤维束的直接数值模拟，以及（iii）多尺度有限元模拟方法。结果表明，对于纤维断裂密度演化，簇形成和极限强度，不同建模方法的预测之间存在显着差异，并且这三种模型中的每一种都具有相对于其他模型的独特优势。