Draping Behavior of Carbon Non-Crimp Fabrics and Its Effects on Mechanical Performance of the Hemispherical Composites
Draping Behavior of Carbon Non-Crimp Fabrics and Its Effects on Mechanical Performance of the Hemispherical Composites
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碳无卷曲织物的悬垂行为及其对半球复合材料力学性能的影响
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Ming Gong
中科院分区：
文献类型：
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作者：
Long Li;Yan Zhao;Gang Liu;X. Zhao;Jiupeng Song;Ming Gong
为了研究无卷曲织物的悬垂性能，采用半球面模具，通过拉伸成型工艺制备了经编链式组织和链式组织两种类型的碳纤维无卷曲织物。在不同压边保持器力下，在半球上测量了织物的剪切角和成形缺陷。结果表明，提高压边力可以略微提高剪切角，减少织物变形的不对称性，改变工艺缺陷的主要类型。此外，对相应的复合材料构件进行了压缩试验。通过分析纤维体积分数和织物增强体结构参数的变化，研究了NCF的悬垂性对复合材料力学性能的影响。结果表明，覆盖工艺对最终部件的力学性能有明显的影响，这与NCF的缝合模式密切相关。
In order to investigate the draping behavior of non-crimp fabrics (NCFs), two types of carbon NCFs with tricot-chain stitches or chain stitches were formed on a hemispherical mould via a stretch forming process. The shear angle and forming defects of the fabrics were measured on the hemisphere, under different blank holder forces (BHFs). The results showed that increasing BHF could enhance the shear angle slightly, reduce the asymmetry for the deformation of the fabrics, and change the main type of the process-induced defects. Besides, compression tests were performed on the corresponding composite components. By analyzing the change of fiber volume fraction and structural parameters of the textile reinforcements, the effects of draping behavior of NCFs on the mechanical performance of the composites were studied. The results reveal that draping process has distinguishable impacts on the mechanical properties of the final components, which is closely related to the stitching pattern of the NCFs.