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首页> 外文期刊>Engineering Fracture Mechanics >Augmenting mode-II fracture toughness of carbon fiber/epoxy composites through carbon nanotube grafting
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Augmenting mode-II fracture toughness of carbon fiber/epoxy composites through carbon nanotube grafting

机译：通过碳纳米管接枝增强碳纤维/环氧复合材料的模糊模式-II裂缝韧性

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摘要

Systematic experimental investigation is carried out to characterize the effect of carbon nanotubes (CNTs) grafting on the average mechanical properties and mode-II fracture toughness of carbon fiber reinforced plastics (CFRPs). Two growth strategies are used in a chemical vapor deposition (CVD) reactor to ensure uniform coverage of both sides of fiber fabric with CNTs. Improvement in interlaminar shear strength of CFRP due to incorporation of CNTs is found to be sensitive to the uniformity of grafted CNTs on the fabric surface. It is shown that the use of optimum CNT grafting strategy on the fiber surfaces leads to a significant improvement in flexural properties and mode-II fracture toughness of conventional CFRPs. However, the use of CNT grafted laminas in the composite laminate does not alter the response of CFRP under the uniaxial tensile loading. Scanning electron microscopy (SEM) analysis of failed composite coupons after mode-II testing reveals that different failure mechanisms operate in composite laminate fabricated with or without the use of CNT grafted laminas.
机译：进行了系统的实验研究，以表征碳纳米管（CNT）接枝对碳纤维增强塑料（CFRP）的平均力学性能和模式-II断裂韧性的影响。化学气相沉积（CVD）反应器中使用两种生长策略，以确保纤维织物两侧的均匀覆盖用CNT。发现CNT掺入CFRP的CFRP的InterlaMAR剪切强度的改善对织物表面上接枝CNT的均匀性敏感。结果表明，在纤维表面上使用最佳CNT接枝策略导致常规CFRP的弯曲性能和模式-II断裂韧性的显着改善。然而，在复合层压板中使用CNT接枝的薄层不会改变单轴拉伸负载下CFRP的响应。在模式-II试验后，扫描电子显微镜（SEM）分析失效的复合试样，显示不同的故障机制在具有或不使用CNT接枝层状的复合层压板中操作。

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