激光处理对CFRP与铝胶接性能的研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (4): 56-61.

激光处理对CFRP与铝胶接性能的研究

吴瑶^1,2,3, 孔海娟⁴, 丁小马^1,2,3, 乔蒙蒙^1,2,3

1.东华大学材料科学与工程学院,上海201620;
2.纤维材料改性国家重点实验室,上海201620;
3.上海市轻质结构复合材料重点实验室,上海201620;
4.上海工程技术大学,上海201620

收稿日期:2017-10-19 出版日期:2018-04-20 发布日期:2018-04-20
通讯作者: 余木火(1961-),男,教授,主要从事纤维增强树脂基复合材料等方面的研究,yumuhuo@dhu.edu.cn。
作者简介:吴瑶(1992-),女,硕士,主要从事激光处理碳纤维复合材料方面的研究。
基金资助:
轻质结构复合材料上海重点实验室开放课题(17D128105);上海市科委科研课题资金资助(15JC1400302,16DZ1121404,17511102801)

EFFECT OF LASER TREATMENT ON PROPERTIES OF CFRP/ALUMINUM ADHESIVE

WU Yao^1,2,3, KONG Hai-juan⁴, DING Xiao-ma^1,2,3, Qiao Meng-meng^1,2,3

1.College of Materials Science and Engineering, Dong Hua University, Shanghai 201620, China;
2.State Key Laboratory for Modification of Chemical Fiber, Shanghai 201620, China;
3.Shanghai Lightweight Structural Composites Key Laboratory, Shanghai 201620, China;
4.Shanghai University of Engineering Science, Shanghai 201620, China

Received:2017-10-19 Online:2018-04-20 Published:2018-04-20

摘要/Abstract

摘要： 碳纤维增强复合材料(CFRP)具有轻质高强的特点,被广泛应用于汽车、航空航天、建筑等领域。但CFRP表面惰性高,使得CFRP与其他异质材料复合时的胶接强度低,不能满足使用。采用激光(光纤激光器)对CFRP进行表面处理后,再与铝进行胶接测试。利用SEM、接触角测试和光学轮廓仪测试对不同脉宽的激光处理后的CFRP表面形貌、表面能、表面粗糙度进行研究。结果表明,随脉宽增加,处理后的CFRP表面树脂残留量减少,表面粗糙度增加,表面自由能也相应增加。对比激光处理与机械打磨两种方式与铝的胶接性能发现,激光处理的CFRP与铝的胶接强度比未处理提高了1.95倍,比打磨处理提高了1.02倍。对其胶接断面进行分析可知,激光处理试样的断裂模式主要为纤维撕裂破坏。

关键词: 激光处理, 碳纤维复合材料, 单搭接剪切强度, 表面自由能, 表面粗糙度

Abstract: Carbon fiber reinforced polymers (CFRP) have been receiving much interest in motivation and aviation fields due to their outstanding properties including lightweight and high strength. However, bonding strength of CFRP between composites and other materials needs to be enhanced because of the strong surface inertia and weak bonding strength. CFRP was treated by lasers with different pulse widths. The modified surface and cementation section of CFRP were characterized by SEM, contact angle test and surface roughness analysis. The results show that the amount of residual resin on CFRP surface decreased with increasing of pulse width, while the surface energy and surface roughness increased. The efficiency of the laser treatment method has been compared with mechanical grinding method through bonding strength and fiber cross section analysis. The bonding strength of CFRP and aluminum for laser treatment method improved 1.95 times and 1.02 times for mechanical grinding method in compassion with the untreated samples. At last, the bonding mechanism and failure mechanism of this dissimilar joint were investigated.

Key words: laser treatment, CFRP, single lap shear strength, surface free energy, surface roughness

中图分类号:

TB332

吴瑶, 孔海娟, 丁小马, 乔蒙蒙. 激光处理对CFRP与铝胶接性能的研究[J]. 玻璃钢/复合材料, 2018, 0(4): 56-61.

WU Yao, KONG Hai-juan, DING Xiao-ma, Qiao Meng-meng. EFFECT OF LASER TREATMENT ON PROPERTIES OF CFRP/ALUMINUM ADHESIVE[J]. Fiber Reinforced Plastics/Composites, 2018, 0(4): 56-61.

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