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首页> 外文期刊>International Journal of Damage Mechanics >Numerical and experimental study on effect of braiding angle on low-velocity transverse punch response of braided composite tube
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Numerical and experimental study on effect of braiding angle on low-velocity transverse punch response of braided composite tube

机译：编织角度对编织复合管低速横向冲击响应的数值和实验研究

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摘要

In this study, the performance of braided composite tubes under low-velocity transverse impact loading at mid-span was investigated using both numerical and experimental methods. Three types of braided composite tubes with different braiding angles (30 degrees, 45 degrees, and 60 degrees) were manufactured. The transverse punch behavior of the tubes was examined on a low-velocity imspact test bench. A meso-level finite element model of the composite tube was also established for identifying the damage initiation and development. The numerical results showed a good correlation with the experimental data. The mechanical response including force-time histories, force-displacement histories, and fracture morphologies was compared between three types of composite tubes for analyzing the influence of braiding angle on the impact response and failure mode. Although suffering from the low bending stiffness depends on fiber volume fraction at initial impact stage, the braided tube with 30 degrees angle engaged more portion to resist impact loading in subsequent process and thus presented higher peak loading than the one with large angle. In addition, there are distinct different failure modes between composite tubes with various braiding angles. Shear yarn breakage underneath the punch was prone to occur in 30 degrees sample because the braiding yarn was closer to the axial direction of tube. In contrast, the resin was deboned severely from the braiding yarn and then the braiding yarn exhibits plastic deformation in 60 degrees sample due to the stress concentration caused by the large braiding angle.
机译：在该研究中，使用数值和实验方法研究了中间跨度低速横向冲击载荷下编织复合管的性能。制造了具有不同编织角（30度，45度和60度）的三种类型的编织复合管。在低速度型电型试验台上检查管的横向冲压行为。还建立了复合管的中间级有限元模型，用于鉴定损伤启动和发育。数值结果表明与实验数据良好的相关性。在三种类型的复合管之间比较了包括力时间历史，力 - 位移历史和裂缝形态的机械响应，用于分析编织角对冲击响应和故障模式的影响。虽然患有低弯曲刚度的患者取决于初始冲击阶段的纤维体积分数，但是具有30度角度的编织管接合更多部分以在随后的过程中抵抗冲击载荷，因此呈现比具有大角度的峰值升高。另外，具有各种编织角的复合管之间存在不同的不同的失效模式。在冲头下方的剪切纱线断裂易于发生在30度样本中，因为编织纱线更靠近管的轴向。相反，树脂严重地从编织纱中逐出，然后将编织纱线在60度样品中表现出塑性变形，由于由大编织角度引起的应力浓度。

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