Abstract Natural fibers are inexpensive, biodegradable, and have similar specific properties to some synthetic fibers. Hardly any previous investigations exist of a composite made of multiple layers of pure Kevlar fiber fabric and pure Flax fiber fabric in a “sandwich structure”, but it only measured impact properties. The composite was made of 12 Flax/epoxy layers at the core in 3 possible configurations (i.e. [0]12F, [0/90]6F, or [±45]6F) that were sandwiched by 2 Kevlar/epoxy layers (i.e. plain weave) on each side. This study showed maximum change in the mechanical properties with respect to Flax/Epoxy for tension (+137.85% in ET, and +171.22% in σUT), compression (+171.22% in Ec, and −10.6% in σUC), 3-point bending (−11.54% in EB, and +2.19 in σUB), torsion (−5.31% in G, and 395.82% in τ), and water absorption (60.04%). This novel hybrid composite may be useful for research and industry applications.

中文翻译：

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夹层结构中新型 Kevlar/Flax/环氧树脂混合复合材料的力学表征

摘要 天然纤维价格低廉、可生物降解，并且与一些合成纤维具有相似的特性。以前几乎没有任何关于由多层纯凯夫拉纤维织物和纯亚麻纤维织物制成“三明治结构”的复合材料的研究，但它只测量了冲击性能。该复合材料由 12 个亚麻/环氧树脂层在核心处以 3 种可能的配置（即 [0]12F、[0/90]6F 或 [±45]6F）制成，中间夹有 2 个 Kevlar/环氧树脂层（即平编织）在每一边。该研究表明，亚麻/环氧树脂的机械性能在拉伸（ET 为 +137.85%，σUT 为 +171.22%）、压缩（Ec 为 +171.22%，σUC 为 -10.6%），3-点弯曲（EB 为 -11.54%，σUB 为 +2.19）、扭转（G 为 -5.31%，τ 为 395.82%）和吸水率（60.04%）。