Towards balancing in-plane mechanical properties and impact damage tolerance of composite laminates using quasi-UD woven fabrics with hybrid warp yarns
Towards balancing in-plane mechanical properties and impact damage tolerance of composite laminates using quasi-UD woven fabrics with hybrid warp yarns
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DOI：
10.1016/j.compstruct.2019.111083
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发表时间：
2019-10-01
影响因子：
6.3
通讯作者：
Potluri, P.
中科院分区：
文献类型：
--
作者：
Katnam, K. B.;Dalfi, H.;Potluri, P.
进行了一项实验研究，目的是使用准单向（准 UD）机织织物（即低卷曲结构）和纱线级纤维杂化来平衡复合机织层压板的面内机械性能和冲击损伤容限。在这项工作中，复合材料层压板的制造有或没有纱线级杂交和纱线卷曲。通过将高强度纤维（即S-玻璃）和高伸长率纤维（即聚丙烯，PP）通过混纤和包芯工艺相结合，生产出S-玻璃/PP混杂纱。然后用不平衡的经纱和纬纱（即具有高线密度混合 S-玻璃/PP 经纱和低线密度 S-玻璃纬纱的 5H 缎纹）生产准 UD 织物，随后使用真空辅助树脂灌注制造层压板。此外，混合S-玻璃/PP纱线用于制造无卷曲（即无纬纱）和5H缎纹织物（即具有平衡的S-玻璃/PP经纱和纬纱）层压材料。为了进行比较，S-玻璃纱线用于制造无卷曲交叉层压板（即没有纱线级杂交且没有纬纱）。对于所有层压板，通过拉伸和压缩测试来测量面内机械性能，并使用不同能量水平（即 15、25、35 和 50 J）的落锤冲击测试来研究低速冲击响应。此外，冲击损伤容限是通过冲击后压缩测试测量残余压缩强度来表征的。使用扫描电子显微镜对损坏的样本进行研究，以识别层间和层内的失效机制。结果表明，具有低卷曲和纱线级杂化的准单向机织物复合材料可以成功地用于引入有益的纤维结构和微观结构，以平衡面内机械性能和冲击损伤容限。
An experimental study is conducted with the aim of balancing in-plane mechanical properties and impact damage tolerance in composite woven laminates using a quasi-unidirectional (quasi-UD) woven fabric (i.e. low crimp architecture) and yarn-level fibre hybridisation. In this work, composite laminates are manufactured with and without yarn-level hybridisation and yarn crimp. By combining high-strength fibres (i.e. S-glass) and high-elongation fibres (i.e. polypropylene, PP) with commingling and core-wrapping processes, hybrid S-glass/PP yarns are produced. A quasi-UD fabric is then produced with unbalanced warp and weft yarns (i.e. 5H satin with high linear density hybrid S-glass/PP warp and low linear density S-glass weft yarns), and subsequently laminates are manufactured using vacuum-assisted resin infusion. In addition, hybrid S-glass/PP yarns are used to manufacture non-crimp (i.e. without weft yarns) and 5H satin fabric (i.e. with balanced S-glass/PP warp and weft yarns) laminates. For comparison, S-glass yarns are used to manufacture non-crimp cross-ply laminates (i.e. without yarn-level hybridisation and without weft yarns). For all the laminates, the in-plane mechanical properties are measured by using tensile and compressive tests, and the low velocity impact response is investigated using drop-weight impact tests with different energy levels (i.e. 15, 25, 35 and 50 J). Furthermore, the impact damage tolerance is characterised by measuring residual compressive strengths with compression-after-impact tests. The damaged specimens are investigated using scanning electron microscopy to identify inter- and intra-laminar failure mechanisms. The results indicate that the quasi-UD woven fabric composites with low crimp and yarn-level hybridisation can be successfully used to introduce conducive fibre architecture and microstructures to balance in-plane mechanical properties and impact damage tolerance.