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An experimental investigation on the low-velocity impact performance of the CFRP filled with nanoclay

机译：纳米粘土填充CFRP低速冲击性能的实验研究

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In this study, the effect of the commercial nanoclay Cloisite (R) 20A on the impact response of the carbon fiber reinforced polymers was investigated using a low-velocity drop-weight impact machine under three impact energy levels of 10 J, 15 J, and 20 J. Contrary to other studies and for more improvement of the properties, clay nanoparticles were dispersed in the resin through solution blending methodology, and laminate samples were fabricated by vacuum infusion process. The optimal percentage of nanoclay was determined by tensile and flexural tests on the epoxy samples containing various nanoclay contents (0.20.8 wt.%). For a deeper understanding of the damaged nanocomposites, force-time, force-displacement, and energy-time responses were analyzed. Finally, the influence of nanoclay incorporation by solution blending method and the impact-induced damages were explored by measuring the permanent indentation, radiographic analysis, optical and field emission scanning electron microscopy. Addition of 0.2 wt.% Cloisite (R) 20A led to a significant increase in the maximum impact force (up to 25.7%), a reduction of the absorbed energy (up to -50.25%), and a decrease in the maximum displacement (up to -29.08%). Moreover, the permanent indentation and the delamination area were significantly decremented compared to the other studies using direct dispersion to disperse nanoclay in the resin matrix. Furthermore, it was revealed that the addition of nanoclay resulted in the transition of the failure mode of carbon fiber reinforced polymer during low-velocity impact from delamination to matrix cracking. (c) 2021 Elsevier Masson SAS. All rights reserved.
机译：在该研究中，使用在三个冲击能量水平为10J，15 J和20 J.与其他研究相反，为了更好地改进性质，通过溶液混合方法将粘土纳米颗粒分散在树脂中，并通过真空输注过程制造层压样品。通过含有各种纳米粘土内容物（0.20.8重量％）的环氧样品上的拉伸和弯曲试验测定纳米粘土的最佳百分比。为了深入了解纳米复合材料的损坏，力 - 时间，力位移和节能响应。最后，通过测量永久压痕，放射线图像分析，光学发射扫描电子显微镜，探讨了纳米粘土通过溶液混合方法的影响和冲击诱导的损害。加入0.2重量％。％克洛亚钛矿（R）20A导致最大冲击力（高达25.7％）的显着增加，吸收能量的减少（高达-50.25％），并降低最大位移（高达-29.08％）。此外，与使用直接分散在树脂基质中分散纳米粘土的其他研究相比，永久压痕和分层区域显着衰减。此外，揭示了纳米粘土的加入导致碳纤维增强聚合物的失效模式的转变在低速冲击期间从分层到基质裂化。 （c）2021 Elsevier Masson SAS。版权所有。

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