表面硅烷改性和激光加工微倒钩结构对铝合金-CFRP胶接接头性能的影响  

Effects of Surface Silane Modification and Laser Machining Microbarb Structure on Performance of Aluminum Alloy-CFRP Adhesive Joint

作　　者：张书平 曹宇 杨文峰 蔡燕 刘文文[1] 朱德华[1] 张还 Zhang Shuping;Cao Yu;Yang Wenfeng;Cai Yan;Liu Wenwen;Zhu Dehua;Zhang Huan(International Science&Technology Cooperation Base for Laser Processing Robot,Wenzhou University,Wenzhou 325035,Zhejiang,China;Aviation Engineering Institute,Civil Aviation Flight University of China,Guanghan 618307,Sichuan,China;Institute of Laser and Optoelectronic Intelligent Manufacturing,Wenzhou University,Wenzhou 325105,Zhejiang,China)

机构地区：[1]温州大学激光加工机器人国际科技合作基地,浙江温州325035 [2]中国民用航空飞行学院航空工程学院,四川广汉618307 [3]温州大学激光与光电智能制造研究院,浙江温州325105

出　　处：《中国激光》2023年第12期102-110,共9页Chinese Journal of Lasers

基　　金：浙江省自然科学基金重点项目(LD22E050001);四川省科技计划(2021YFSY0025);温州市科技项目(ZG2020038和H2020004)。

摘　　要：碳纤维复合增强材料(CFRP)作为一种力学性能优异的新材料,已经成为航空和汽车轻量化领域的优选材料。因此实现CFRP与铝合金的高强度连接是提升CFRP与铝合金复合结构件整体强度的关键。提出了一种激光阶梯扫描制备倒钩阵列的方法,并将该方法与硅烷表面改性相结合,实现了铝合金与CFRP接头的高强度连接。实验结果表明:激光阶梯扫描制备的倒钩阵列大大增强了胶接界面之间的机械互锁效应,进而增强了接头强度。硅烷偶联剂改性后铝合金与黏结剂之间出现了硅烷过渡层,接头强度得到进一步提升。与砂纸粗化处理相比,激光处理后强度提升了24.6%,达到16.7 MPa,硅烷改性后强度得到进一步提升,达到17.4 MPa。Objective The accelerated advancement of contemporary society has augmented the demand for diverse material properties,including but not limited to,fatigue properties,strength,and damage resistance,in aerospace,transportation,and navigation domains.However,conventional metallic materials,such as aluminum and titanium alloys,cannot always fulfill the high-performance frame member prerequisites specified in the aforementioned sectors.Carbon fiber-reinforced plastics(CFRP),a novel material renowned for its high-performance attributes,presents a promising potential for employment in the mentioned fields.Hence,the association of CFRP with metals is an inescapable prospect.As a connection method with a simple structure and low cost,adhesive joints have special advantages such as smooth adhesive joints,good sealing,and uniform stress distribution.The pretreatment of the bonding interface had a significant influence on joint strength.Laser processing offers significant advantages due to its environmental friendliness,high repeatability and stability,and excellent surface modification ability.Prior research has shown that laser surface treatment and chemical surface modification can enhance the strength of joints between CFRP and aluminum alloy.However,there have been limited studies on the strength changes of adhesively bonded joints between CFRP and aluminum alloy under the combined influence of both treatment methods.Therefore,this study employs a laser step scanning method to create a barb array on the surfaces of both the aluminum alloy and CFRP,and then investigates the effects of the barb array structure and silane coupling agent on the strength and failure mode of the adhesively bonded joint between the two materials.Methods The objective of this experiment is to compare the changes in the bonding strength of the aluminum alloy and CFRP surfaces resulting from different treatment methods.Three surface treatment methods are employed:first,the surfaces of the aluminum alloy and CFRP are ground using sandpaper to inc

关 键 词：激光技术 脉冲激光器 激光材料加工 碳纤维增强塑料 胶接接头 拉伸剪切强度 

分 类 号：V261.8[航空宇航科学与技术—航空宇航制造工程]