Cao Yunwei, Wang Hui, Zhang Qingsong, Huang Kai, Chen Yizhe, Wang Jinhuo, Yan Fei, Liu Huafeng
Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China.
Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan 430070, China.
Polymers (Basel). 2022 Jun 28;14(13):2622. doi: 10.3390/polym14132622.
Carbon fiber reinforced polymer (CFRP) blades are often exposed to wild and even harsh environments. The durability of the blade can be greatly improved by adhesively bonding a Ni erosion shield to the leading edge. In a traditional bonding process, the permeation of adhesive is poor at the interface, which gives an insufficient micromechanical interlocking. In this study, ultrasonic vibration was applied during the bonding process of sandblasted Ni plates and CFRP laminates. The values of shear strength were measured by tensile tests to verify the strengthening effect of applying ultrasonication. The cross-section of the bonded interface was characterized by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS), and the surfaces with different treatments were explored by atomic force microscopy (AFM). The cross-sectional morphology and failure model of the samples were investigated. The strengthening mechanism was then studied by a molecular dynamics method. For the simulation of molecular dynamics, the CFRP/Ni bonding interface model was designed using the Materials Studio software package. The Perl scripts were used to simulate the ultrasonic vibration with different frequencies and amplitudes. The results showed that the ultrasonic process could improve the permeability and uniformity of the adhesive, enhancing the micromechanical interlocking effect.
碳纤维增强聚合物（CFRP）叶片经常暴露在恶劣甚至极端的环境中。通过将镍腐蚀防护层粘结到叶片前缘，可以大大提高叶片的耐久性。在传统的粘结工艺中，胶粘剂在界面处的渗透性较差，导致微机械互锁不足。在本研究中，在喷砂处理的镍板和CFRP层压板的粘结过程中施加了超声振动。通过拉伸试验测量剪切强度值，以验证施加超声处理的强化效果。通过扫描电子显微镜（SEM）和能谱仪（EDS）对粘结界面的横截面进行表征，并通过原子力显微镜（AFM）对不同处理的表面进行探索。研究了样品的横截面形态和失效模式。然后通过分子动力学方法研究强化机理。为了进行分子动力学模拟，使用Materials Studio软件包设计了CFRP/Ni粘结界面模型。使用Perl脚本模拟不同频率和振幅的超声振动。结果表明，超声处理可以提高胶粘剂的渗透性和均匀性，增强微机械互锁效果。
