Abstract

In this paper, the influence of graphene-oxide nanoplatelets (GONPs) on the response of the glass laminate aluminum reinforced epoxy (GLARE) under high-velocity impact loading was investigated. Different weight percentages of nanofillers including 0.25, 0.50 and 1.00 wt % GONPs and a hybrid of 0.25 wt % GONPs and 0.25 wt % multiwalled carbon nanotubes (MWCNTs) were used for reinforcing GLAREs. Addition of 0.5 wt % GONPs reduced the residual impactor velocity by 33% and increased the energy absorption capability of GLARE by 22.9%. The SEM micrographs showed reinforced adhesion between the fibers and matrix and the optical microscope images showed improved cohesion in the matrix of the reinforced GLARE. This caused the secondary damage region in the composite layer to decrease considerably. However, GONPs imposed negative effect on the suppression of composite layer delamination and also interfacial strength between the composite and aluminum layers that provided more extensive plastic deformation of aluminum as an important energy absorption mechanism of GLAREs. Furthermore, the composite layers of the unreinforced and reinforced GLAREs were subjected to tensile test and the results showed improvements in the tensile stiffness, strength and toughness by 33.4, 45.0 and 25.6%, respectively, due to adding of 0.5 wt % GONPs to the matrix.

中文翻译：

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氧化石墨烯纳米片对玻璃层压铝增强环氧树脂的高速冲击响应的影响

摘要

本文研究了石墨烯氧化物纳米片（GONPs）在高速冲击载荷下对玻璃层压铝增强环氧树脂（GLARE）响应的影响。包括0.25、0.50和1.00重量％的GONP以及0.25重量％的GONP和0.25重量％的多壁碳纳米管（MWCNT）的杂化物的不同重量百分比的纳米填料被用于增强GLARE。添加0.5 wt％的GONP将撞击器的残余速度降低了33％，并将GLARE的能量吸收能力提高了22.9％。SEM显微照片显示纤维与基质之间的粘合性增强，光学显微镜图像显示增强的GLARE基质中的粘合性提高。这导致复合层中的次级损坏区域显着减小。然而，GONP对抑制复合层分层以及复合层和铝层之间的界面强度产生负面影响，这提供了更广泛的铝塑性变形，这是GLARE的重要能量吸收机制。此外，对未增强和增强的GLARE的复合层进行了拉伸测试，结果表明，由于向基体中添加了0.5 wt％的GONP，拉伸强度，强度和韧性分别提高了33.4％，45.0％和25.6％。 。