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首页> 外文期刊>Composite Structures >The effect of braid angle on the flexural performance of structural braided thermoplastic composite beams
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The effect of braid angle on the flexural performance of structural braided thermoplastic composite beams

机译：辫子角度对结构编织热塑性复合梁弯曲性能的影响

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Thermoplastic braided composite tubular beams were manufactured using commingled hybrid yarn with braid angles 30 degrees, 45 degrees and 60 degrees and tested in static three-point flexure. Two principal deformation modes were observed during the flexural loading: global flexure and localised crush. The extent of each mode occurring in the three braid angle variants was measured using a linear deflectometer as well as 3D digital image correlation. Localised crushing was found to decrease significantly with increasing braided angle, accounting for 63%, 45% and 19% of the total applied deflection for the 30 degrees, 45 degrees and 60 degrees beams respectively. Further, surface strain measurements obtained from 3D DIC showed increasing the braid angle led to a global flexure-dominated deformation. In addition, the stiffness and peak load increased with increasing braid angle. The observed differences in deformation modes were due to a combination of multiple braid angle-dependent properties of braided composites such as modulus, thickness etc.
机译：热塑性编织复合管状梁由带有辫子角度30度，45度和60度的混合纱线制造，并在静态三点弯曲中进行测试。在弯曲载荷期间观察到两个主变形模式：全球弯曲和局部粉碎。使用线性偏转仪以及3D数字图像相关性测量三个编织角变型中发生的每种模式的程度。发现局部破碎以增加编织角度显着降低，分别占30度，45度和60度梁的总施加偏转的63％，45％和19％。此外，从3D DIC获得的表面应变测量结果显示增加了编织角度导致全局挠曲占主导地相变形。另外，刚度和峰值负荷随着编织角度的增加而增加。所观察到的变形模式的差异是由于编织复合材料如模量，厚度等的多个编织角依赖性的组合。

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