Interlaminar properties and toughening mechanisms of aligned carbon nanotube fiber veil interleaved carbon fiber/epoxy composites

被引：0

作者：

Wu L. ^{[1
,2
]}

Ou Y. ^{[2
]}

Mao D. ^{[2
]}

Zhu L. ^{[2
]}

Liu L. ^{[1
]}

Li H. ^{[2
]}

机构：

[1] School of Material Science and Engineering, Shanghai University, Shanghai

[2] Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 10期

基金：

中国博士后科学基金;

关键词：

carbon nanotube veil; CFRP; crack deflection; fiber bridging; interlaminar toughening;

D O I：

10.13801/j.cnki.fhclxb.20221228.002

中图分类号：

学科分类号：

摘要：

Carbon fiber reinforced polymer (CFRP) composites are widely used because of their excellent properties such as high specific strength and high specific modulus, but their mechanical properties along the thickness are poor due to the laminar structure characteristics and the intrinsic brittleness of epoxy resin, and they are prone to delamination under out-of-plane impact and in-plane compression loads, which in turn reduce the strength of the composites. Therefore it is especially important to improve the interlaminar fracture toughness of the composites. In this paper, we attempt to improve the interlaminar fracture toughness of the composite by introducing highly oriented carbon nanotube (CNT) fiber veils in the interlaminar region. To ensure that the fiber veils are well infiltrated by the resin, they are first immersed in an epoxy resin solution diluted with acetone. After the acetone evaporated, it is inserted into the interlayer region of the homemade carbon fiber prepreg and subsequently cured by a hot pressing process. The mode I and mode II interlaminar fracture toughness of the toughened samples are evaluated via ASTM testing standards. Combined with the optical microscopic observation of the cross-section and scanning electron microscopy analysis of the fracture surface, the crack propagation paths are clearly shown and the interlaminar toughening mechanisms of CNT fiber veils are revealed. The results show that the mode I and mode II interlaminar fracture toughness of CNT veil toughened samples are improved by 37.4% and 41.8%, respectively. The toughening mechanisms mainly include matrix toughening, strengthening carbon fiber bridging and crack deflection. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

页码：5611 / 5620

页数：9

共 28 条

[1]

MUGAHED AMRAN Y H, ALYOUSEF R, RASHID R S M, Et al., Properties and applications of FRP in strengthening RC structures: A review[J], Structures, 16, pp. 208-238, (2018)

[2]

BOON Y D, JOSHI S C., A review of methods for improving interlaminar interfaces and fracture toughness of laminated composites[J], Materials Today Communications, 22, (2020)

[3]

LU W, ZU M, BYUN J H, Et al., State of the art of carbon nanotube fibers: Opportunities and challenges[J], Advanced Materials, 24, 14, pp. 1805-1833, (2012)

[4]

IIJIMA S., Helical microtubules of graphitic carbon[J], Nature, 354, 6348, pp. 56-58, (1991)

[5]

TREACY M M J, EBBESEN T W, GIBSON J M., Exceptionally high Young's modulus observed for individual carbon nanotubes[J], Nature, 381, 6584, pp. 678-680, (1996)

[6]

WONG E W, SHEEHAN P E, LIEBER C M., Nanobeam mechanics: Elasticity, strength, and toughness of nanorods and nanotubes[J], Science, 277, 5334, pp. 1971-1975, (1997)

[7]

OUYANG Q, WANG X, LIU L., High crack self-healing efficiency and enhanced free-edge delamination resistance of carbon fibrous composites with hierarchical interleaves[J], Composites Science and Technology, 217, (2022)

[8]

GODARA A, MEZZO L, LUIZI F, Et al., Influence of carbon nanotube reinforcement on the processing and the mechanical behaviour of carbon fiber/epoxy composites[J], Carbon, 47, 12, pp. 2914-2923, (2009)

[9]

WARRIER A, GODARA A, ROCHEZ O, Et al., The effect of adding carbon nanotubes to glass/epoxy composites in the fibre sizing and/or the matrix[J], Composites Part A: Applied Science and Manufacturing, 41, 4, pp. 532-538, (2010)

[10]

KIM M, RHEE K, LEE J, Et al., Property enhancement of a carbon fiber/epoxy composite by using carbon nanotubes[J], Composites Part B: Engineering, 42, 5, pp. 1257-1261, (2011)

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