氧化石墨烯改性碳纤维复合材料抗冲击行为研究

doi:10.19491/j.issn.1001-9278.2020.08.003

中国塑料 ›› 2020, Vol. 34 ›› Issue (8): 17-23.DOI: 10.19491/j.issn.1001-9278.2020.08.003

氧化石墨烯改性碳纤维复合材料抗冲击行为研究

王森¹, 赖家美¹(), 阮金琦¹, 万义标¹, 黄志超²

^1.南昌大学机电工程学院聚合物成型研究室，南昌 330031
^2.华东交通大学机电工程学院载运工具与装备教育部重点实验室，南昌 330013

收稿日期:2020-03-13 出版日期:2020-08-26 发布日期:2020-08-26
基金资助:
国家自然科学基金(51763016)

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

Sen WANG¹, Jiamei LAI¹(), Jinqi RUAN¹, Yibiao WAN¹, Zhichao HUANG²

^1.Polymer Molding Research Office, School of Mechanical and Electrical Engineering, Nanchang University, Jiangxi 330031，China
^2.Key Laboratory of Transportation Tools and Equipment, Ministry of Education, East China Jiaotong University, Jiangxi 330013，China

Received:2020-03-13 Online:2020-08-26 Published:2020-08-26
Contact: Jiamei LAI E-mail:laijm@163.com

摘要/Abstract

摘要：

使用单层纳米氧化石墨烯（NGO）粒子对环氧树脂进行改性处理，采用真空辅助树脂传递模塑成型工艺制备了[±45/0/90]_2S铺层角度下的纯树脂及单层NGO改性碳纤维复合材料（CFRP）层合板。通过落锤冲击试验、超声C扫描检测、冲击后压缩试验等对纯树脂及单层NGO改性CFRP进行实验研究。结果表明，纯树脂及单层NGO改性CFRP在损伤阻抗及损伤容限实验中均存在拐点现象，且拐点出现在相同深度位置，其中纯树脂CFRP拐点位置为0.51 mm，单层NGO改性CFRP拐点位置为0.43 mm；相对于纯树脂CFRP，单层NGO改性CFRP可以显著提高复合材料的抗冲击性能及冲击后的压缩性能；通过对冲击后凹坑深度及凹坑面积进行数据模拟，可以用拟合公式实现对复合材料的损伤预测。

关键词: 纤维增强, 粒子改性, 拐点, 损伤预测

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

中图分类号:

TQ323.5

王森, 赖家美, 阮金琦, 万义标, 黄志超. 氧化石墨烯改性碳纤维复合材料抗冲击行为研究[J]. 中国塑料, 2020, 34(8): 17-23.

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.

图/表 13

改性粒子	型号	尺寸/μm	比表面积/m²_·g^-1	厚度/nm	氧含量/%
单层NGO	LN?GO?2	0.5~5	50~200	0.8~1.2	≥45

表1 改性粒子材料参数

Tab.1 Properties of the modified particles

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

表2 层合板参数设置

Tab. 2 Parameter setting for the laminated plate

图1 水浸超声C扫描装置

Fig.1 Immersion ultrasonic C?scan device

图2 冲击后压缩试验

Fig.2 Post?impact compression test

图3 纯树脂及单层NGO改性CFRP层板冲击能量-凹坑深度曲线

Fig.3 Impact energy pit depth of pure resin and single?layer NGO modified CFRP laminates

图4 单层NGO增强CFRP层板冲击损伤形貌

Fig.4 Impact damage morphology of single?layer NGO enhanced CFRP laminate

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

表3 深度拟合公式及相关系数

Tab.3 Depth fitting formula and correlation coefficient

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

表4 凹坑深度拟合

Tab.4 Pit depth fitting

图5 CFRP层板超声C扫描结果

Fig.5 Ultrasonic C?scan results of CFRP laminates

图6 纯树脂及单层NGO改性CFRP冲击能量?损伤面积曲线

Fig.6 Impact energy damage area of pure resin and monolayer nano go reinforced CFRP laminates

组

别

拟合公式

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组别	冲击能量/J	凹坑面积计算值/mm²	凹坑面积实际值/mm²	绝对误差/mm²	相对误差/%
A	35	4 219.6	4 411.9	192.3	4.36
A	65	5 829.1	5 688.3	140.8	2.48
B	45	3 873.0	3 921.6	48.6	1.2
B	75	4 967.5	5 297.7	330.2	6.2

组别	冲击能量/J	凹坑面积计算值/mm²	凹坑面积实际值/mm²	绝对误差/mm²	相对误差/%
A	35	4 219.6	4 411.9	192.3	4.36
A	65	5 829.1	5 688.3	140.8	2.48
B	45	3 873.0	3 921.6	48.6	1.2
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氧化石墨烯改性碳纤维复合材料抗冲击行为研究

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

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