Mode II fracture toughening and healing of composites using supramolecular polymer interlayers
Mode II fracture toughening and healing of composites using supramolecular polymer interlayers
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DOI：
10.3144/expresspolymlett.2016.85
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发表时间：
2016-11-01
影响因子：
3.3
通讯作者：
Bosman, A. W.
中科院分区：
文献类型：
--
作者：
Kostopoulos, V.;Kotrotsos, A.;Bosman, A. W.
本研究的重点是转移的愈合功能的超分子聚合物（SP）的纤维增强复合材料，通过交织。基于氢键表现出自愈合的SP形成膜，并成功地纳入碳纤维复合材料。在Ⅱ型断裂载荷下，研究了SP插层对混杂复合材料面内断裂韧性和随后的愈合能力的影响。的断裂韧性表现出相当大的增加，因为混合复合材料的最大载荷（P-max）大约增加了一倍，因此，模式II层间断裂韧性能量（G（IIC））表现出增加达到近100%相比，参考复合材料。使用外部热量激活愈合组件。测量活化后的P-max和G（IIC）恢复，在第一个愈合周期后，P-max的愈合效率接近85%，G（IIC）接近100%，最终P-max下降到80%，而G（IIC）即使在第四个愈合周期后仍保持在100%左右。在测试过程中的声发射活动进行了监测，并发现由于SP的存在而大大减少。
This study focuses on the transfer of the healing functionality of supramolecular polymers (SP) to fibre reinforced composites through interleaving. SPs exhibiting self-healing based on hydrogen bonds were formed into films and were successfully incorporated into carbon fibre composites. The effect of the SP interleaves on in-plane fracture toughness and the subsequent healing capability of the hybrid composites were investigated under mode II fracture loading. The fracture toughness showed considerable increase since the maximum load (P-max) of the hybrid composite approximately doubled, and consequently the mode II interlaminar fracture toughness energy (G(IIC)) exhibited an increase reaching nearly 100% compared to the reference composite. The healing component was activated using external heat. P-max and G(IIC) recovery after activation were measured, exhibiting a healing efficiency after the first healing cycle close to 85% for P-max and 100% for G(IIC), eventually dropping to 80% for P-max while G(IIC) was retained around 100% even after the fourth healing cycle. Acoustic Emission activity during the tests was monitored and was found to be strongly reduced due to the presence of the SP.