Impact Behavior of Carbon⁃fiber⁃reinforced Composite Modified by Graphene Oxide

doi:10.19491/j.issn.1001-9278.2020.08.003

Abstract

Abstract:

Epoxy resin was modified with single-layered graphene oxide and then used to prepare the carbon-fiber-reinforced composite (CFRP) laminates by a vacuum-assisted resin transfer molding process under the [45/0/90]_2S ply angle. A series of performance characterizations including drop hammer impact test, ultrasonic C scan test and post-impact compression test were conduct to investigate the modified epoxy-based CFRP laminates as well as the unmodified epoxy-based laminates as a control. The results indicated that both the modified epoxy-based CFRP laminates and the unmodified ones had inflection points in damage resistance and damage tolerance curves, and the inflection points appeared at the same depth position. Furthermore, the modified epoxy-based CFRP laminates and the unmodified ones exhibited the inflection points at 0.43 and 0.51 mm, respectively. Compared to the unmodified epoxy-based laminates, the modified ones achieved a significant improvement in impact resistance and post-impact compression performance. The damage prediction of composites can be realized by the fitting formula through the data simulation of pit depth and pit area after impact.

Key words: fiber reinforcement, particle modification, inflection point, damage prediction

CLC Number:

TQ323.5

Sen WANG, Jiamei LAI, Jinqi RUAN, Yibiao WAN, Zhichao HUANG. Impact Behavior of Carbon⁃fiber⁃reinforced Composite Modified by Graphene Oxide[J]. China Plastics, 2020, 34(8): 17-23.

Figures/Tables 13

References 20

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组别	改性粒子	铺层角度	厚度/mm	冲击能量/J
A	无	[±45/0/90]_2S	5.12	20、30、40、50、60、70、80、90、100
B	0.3 %单层NGO	[±45/0/90]_2S	5.11	20、30、40、50、60、70、80、90、100

组别	改性粒子	铺层角度	厚度/mm	冲击能量/J
A	无	[±45/0/90]_2S	5.12	20、30、40、50、60、70、80、90、100
B	0.3 %单层NGO	[±45/0/90]_2S	5.11	20、30、40、50、60、70、80、90、100

组别	拟合公式	相关系数( R²)
A	D=-0.216 43+0.040 64×E-0.001 43×E²+1.828×10^-5×E³	0.995 92
B	D=-2.547 14+0.177 91×E-0.003 87×E²+2.856 06×10^-5×E³	0.998 6

组别	拟合公式	相关系数( R²)
A	D=-0.216 43+0.040 64×E-0.001 43×E²+1.828×10^-5×E³	0.995 92
B	D=-2.547 14+0.177 91×E-0.003 87×E²+2.856 06×10^-5×E³	0.998 6

组别	冲击能量/J	凹坑深度计算值/mm	凹坑深度实际值/mm	绝对误差/mm	相对误差/%
A	35	0.234	0.243	0.009	3.7
A	65	1.42	1.31	0.11	8.4
B	45	0.22	0.19	0.03	15.8
B	75	1.08	1.12	0.04	3.6