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Effects of winding angles on mechanical properties of filament wound pipes

机译:缠绕角度对纤维缠绕管力学性能的影响

摘要

The aim of this study is to investigate the mechanical properties of continuous glass fiber reinforced composite tubes produced by filament winding technique with three different winding angles. With help of split-disk tests hoop tensile properties of selected specimens were determined, where reliable results were obtained with low standard deviations. It was observed that bigger winding angle lead to higher hoop tensile properties of filament-wound tubular samples.udAlso, the effect of reinforcement direction on the mechanical performances of these composites has been presented. Fiber fracture and fiber-matrix debonding is observed to be the dominant failure mechanisms by samples winded with bigger winding angles, whereas delamination in addition to these mechanisms is detected by samples with smaller winding angles. From received results it is concluded that, mechanical properties of composite specimens are depended from winding angles in filament winding technology.udWith help of conducted SEM analysis good merger between glass fibers and the epoxy matrix was seen, but cracks within plies and broken fiber were noticed, due to the high fiber branching.
机译:这项研究的目的是研究用长丝缠绕技术生产的具有三种不同缠绕角度的连续玻璃纤维增​​强复合管的力学性能。借助裂盘测试,确定了选定样品的环向拉伸性能,并获得了低标准偏差的可靠结果。观察到较大的缠绕角导致长丝缠绕管状样品的环向拉伸性能更高。 ud此外,还提出了增强方向对这些复合材料力学性能的影响。观察到以较大缠绕角缠绕的样品是纤维断裂和纤维基体剥离的主要失效机理,而除了具有这些机理的分层,还通过缠绕角度较小的样品检测出分层。从收到的结果可以得出结论,复合材料试样的机械性能取决于长丝缠绕技术中的缠绕角度。 ud借助进行的SEM分析,可以观察到玻璃纤维与环氧基质之间的良好融合,但是层间的裂纹和断裂的纤维仍然存在注意到,由于高纤维分支。

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