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A novel quartz fibre reinforced dense polylmide matrix composite: effect of preform stitching

机译：一种新型石英纤维增强致密致密聚乙烯基质复合材料：预成型缝合的影响

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摘要

A dense polyimide (PI) composite reinforced by quartz fibres (QFs), was prepared by vacuum assisted polymer infiltration and hot-pressing in this work. The microstructures and the mechanical properties of the as-fabricated composites were investigated. The results show a high flexural strength (≈686 MPa) of the composite, due to its dense nature. Moreover, there was no significant change in the bending strength of the stitched composites. The laminates mainly suffered delaminations and fracture of the QFs. The intralaminar bonding of the composite was enhanced by a novel stitching technique (all 28 layers stitched together by untwisted quartz filament tows in the plain stitch). As a result, the interlaminar fracture energy with 1 stitches cm~(-2) stitch density was increased by 87.1%, compared to that of the unstitched composite. In the case of stitched specimens, stitching plays an important role in improving the G_c and suppresses the influence of in-plane fibre orientation.
机译：通过石英纤维（QFS）加强的致密聚酰亚胺（PI）复合材料通过真空辅助聚合物渗透和在这项工作中热压制备。 研究了微观结构和制造复合材料的机械性能。 结果表明，由于其致密的性质，复合材料的高弯曲强度（≈686MPa）。 此外，缝合复合材料的弯曲强度没有显着变化。 层压板主要遭受QFS的分层和骨折。 通过新型缝合技术（所有28层通过普通缝线中的无捻石英丝带缝合在一起）增强了复合材料的intralamar键合。 结果，与未铰接式的复合材料相比，具有1针迹CM〜（-2）缝合密度的斜面裂缝能量增加了87.1％。 在缝合样品的情况下，缝合在改善G_C并抑制面内纤维取向的影响起着重要作用。

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  • 来源
    《Plastics, Rubber and Composites》 |2019年第10期|共5页
  • 作者

    Huizhen Bai; Xun Sun; Haitao Liu;

  • 作者单位

    Electronic Countermeasure Institute National University of Defense Technology Hefei People's Republic of China;

    College of Aerospace Science and Engineering National University of Defense Technology Changsha People's Republic of China;

    College of Aerospace Science and Engineering National University of Defense Technology Changsha People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
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