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首页> 外文期刊>Composite Structures >Crashworthy characteristics of axially statically compressed thin-walled square CFRP composite tubes: experimental
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Crashworthy characteristics of axially statically compressed thin-walled square CFRP composite tubes: experimental

机译：轴向静压薄壁方形CFRP复合管的耐碰撞特性：实验

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摘要

In this paper the results of experimental works pertaining to the crash behaviour, collapse modes and crashworthiness characteristics of carbon fibre reinforced plastic (CFRP) tubes that were subjected to static axial compressive loading are presented in detail. The tested specimens were featured by a material combination of carbon fibres in the form of reinforcing woven fabric in thermosetting epoxy resin, and they were cut at various lengths from three CFRP tubes of the same square cross-section but different thickness, laminate stacking sequence and fibre volume content. CFRP tubes were compressed in a hydraulic press of 1000 kN loading capacity at very low-strain rate typical for static testing. The influence of the most important specimen geometric features such as the tube axial length, aspect ratio and wall thickness on the compressive response and collapse modes of the tested tubes is thoroughly analysed. In addition, the effect of the laminate material properties such as the fibre volume content and stacking sequence on the energy absorbing capability of the thin-wall tubes is also examined. Particular attention is paid on the analysis of the mechanics of the tube axial collapse modes from macroscopic and microscopic point of view, emphasizing on the mechanisms related to the crash energy absorption during the compression of the composite tubes.
机译：本文详细介绍了承受静态轴向压缩载荷的碳纤维增强塑料（CFRP）管的碰撞行为，坍塌模式和耐撞性的实验工作结果。被测样品的特征是碳纤维在热固性环氧树脂中以增强机织织物的形式结合在一起，并从具有相同方形横截面但厚度不同，层压顺序和厚度不同的三根CFRP管中以不同长度切割而成。纤维体积含量。 CFRP管在负载能力为1000 kN的液压机中以非常低的应变速率（通常用于静态测试）进行压缩。彻底分析了最重要的试样几何特征，例如管的轴向长度，长宽比和壁厚，对被测管的压缩响应和塌陷模式的影响。此外，还检查了层压材料特性（如纤维体积含量和堆积顺序）对薄壁管能量吸收能力的影响。从宏观和微观的角度特别关注管轴向塌陷模式的力学分析，重点是与复合管压缩过程中吸收碰撞能量有关的机理。

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