Improvement in fatigue life of carbon fibre reinforced polymer composites via a Nano-Silica Modified Matrix
Improvement in fatigue life of carbon fibre reinforced polymer composites via a Nano-Silica Modified Matrix
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DOI：
10.1016/j.carbon.2020.08.029
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发表时间：
2020-12-01
期刊：
影响因子：
10.9
通讯作者：
Koratkar, Nikhil
中科院分区：
文献类型：
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作者：
Kamble, Mithil;Lakhnot, Aniruddha Singh;Koratkar, Nikhil
碳纤维增强聚合物（CFRP）复合材料日益成为各种高性能结构应用的首选材料，包括航空航天、国防、风能和汽车工业。这些材料的一个关键限制是它们的疲劳寿命差，这是由环氧树脂基体中小规模裂纹的产生和生长引起的。在这里，我们表明，将纳米二氧化硅掺入到环氧树脂中导致纳米改性CFRP（nanoCFRP）在高周疲劳状态下具有6-7倍的疲劳寿命。观察到的性能改善的机制是纳米二氧化硅破坏和延长初期裂纹的传播过程的能力。这反过来又推迟了CFRP的最终失效，导致疲劳寿命增加。用二氧化硅纳米颗粒实现这种结果的能力具有很强的实际意义，因为纳米二氧化硅对于大规模工业应用来说是容易获得的并且经济上便宜。(C)2020爱思唯尔有限公司保留所有权利。
Carbon fiber reinforced polymer (CFRP) composites are increasingly the material of choice in a variety of high performance structural applications including the aerospace, defense, wind energy and automotive industries. A key limitation of these materials is their poor fatigue life induced by initiation and growth of small-scale cracks in the epoxy matrix. Here, we show that incorporation of nano-silica into the epoxy resin results in nano-modified CFRP (nanoCFRP) with 6-7 fold higher fatigue life in the high cycle fatigue regime. The mechanism for the observed performance improvement is the ability of the nano-silica to disrupt and prolong the propagation process of incipient cracks. This in turn postpones the eventual failure of the CFRP, leading to fatigue life increase. The ability to achieve such results with silica nanoparticles has strong practical implications, since nano-silica are easily accessible and economically inexpensive for large-scale industrial applications. (C) 2020 Elsevier Ltd. All rights reserved.