Abstract This paper performs a systematic study of the effect of various unidirectional fibre patterns, ranging from different overlapping lengths of adjacent fibre bundles to a complete randomization of the position of individual fibre ends. The study is benchmarked with the mechanical behaviour of a fully continuous unidirectional bamboo fibre-epoxy composite and will show the feasibility of using UD discontinuous technical bamboo fibres in continuous preforms for high-end composites applications. The study shows that the tensile stiffness is hardly influenced by the discontinuity patterns, while the introduction of randomized fibre end discontinuities (individual fibres with segment length 50 mm) leads to a preservation of 85% of the longitudinal tensile strength in comparison with a UD continuous bamboo fibre composite.

中文翻译：

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竹纤维增强环氧树脂复合材料中不连续性的影响

摘要 本文系统地研究了各种单向纤维图案的影响，从相邻纤维束的不同重叠长度到单个纤维末端位置的完全随机化。该研究以完全连续的单向竹纤维-环氧树脂复合材料的机械性能为基准，并将展示在高端复合材料应用的连续预制件中使用 UD 不连续技术竹纤维的可行性。研究表明，拉伸刚度几乎不受不连续模式的影响，而引入随机纤维末端不连续性（段长为 50 毫米的单个纤维）与 UD 连续纤维相比，纵向拉伸强度保留了 85%。竹纤维复合材料。