Stitched mendable composites: Balancing healing performance against mechanical performance
Stitched mendable composites: Balancing healing performance against mechanical performance
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DOI：
10.1016/j.compstruct.2014.12.034
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发表时间：
2015-05-01
影响因子：
6.3
通讯作者：
Mouritz, A. P.
中科院分区：
文献类型：
--
作者：
Pingkarawat, K.;Mouritz, A. P.
研究了热塑性纤维全厚度缝合对可修补碳/环氧复合材料愈合效率和力学性能的影响。用聚乙烯-共-甲基丙烯酸（EMAA）的长丝缝合提供了具有高抗分层性和自愈合效率的复合材料，但以降低的机械性能为代价。热塑性缝合显著提高了Ⅰ、Ⅱ型层间断裂韧性和愈合性能。然而，缝合降低了可修补复合材料的拉伸和压缩性能。实验研究表明，随着可修补缝线面积密度或尺寸的增大，可修补缝线的脱层韧性和愈合性能提高，而力学性能下降。然而，层间断裂韧性（约35-650%）和愈合效率（50-250%）的百分比改善远大于由热塑性缝合引起的机械性能的降低（小于50%）。(C)2014爱思唯尔有限公司版权所有。
The effect of through-the-thickness stitching with thermoplastic filaments on the healing efficiency and mechanical properties of mendable carbon epoxy composites is investigated. Stitching with filaments of polyethylene-co-methacrylic acid (EMAA) provides composite materials with high delamination resistance and self-healing efficiency, but at the expense of reduced mechanical properties. The modes I and II interlaminar fracture toughness properties and healing performance are improved greatly by thermoplastic stitching. However, stitching reduces the tensile and compressive properties of mendable composites. Experimental research reveals that the delamination toughness and healing properties increase whereas the mechanical properties decrease with increasing areal density or size of the mendable stitches. However, the percentage improvements to the interlaminar fracture toughness (in the order of 35-650%) and healing efficiency (50-250%) are much greater than the reductions to the mechanical properties (less than 50%) caused by thermoplastic stitching. (C) 2014 Elsevier Ltd. All rights reserved.