脉冲CO2激光预处理对CFRP黏结性能的实验研究
Experimental and Theoretical Study of the Bonding Performance of CFRP by Pulsed CO2 Laser Pretreatment
李倩靓 1金聪 1刘可欣 1张骆 1何宗泰 1翟中生 1刘顿1
作者信息
- 1. 湖北工业大学超快激光加工研究中心,湖北武汉 430068;湖北工业大学机械工程学院现代制造质量工程湖北省重点实验室,湖北武汉,430068
- 折叠
摘要
针对碳纤维复合材料(CFRP)胶接前表面处理技术需求,研究采用脉冲CO2激光器对CFRP进行表面改性预处理,以提高CFRP间的黏结强度.探究脉冲CO2激光预处理CFRP表面对其胶接性能的影响.通过使用扫描电子显微镜、激光共聚焦显微镜、接触角测量仪、X射线光电子能谱仪和拉伸试验机,对样品表面的微观形态、润湿性、化学成分和力学性能进行表征.对比分析了不同表面处理方法对CFRP黏结强度的作用机制.实验结果表明,脉冲CO2激光预处理对CFRP表层树脂的选择性去除和含氧官能团的诱导有利于胶接头之间黏结强度的提升.此外,经脉冲CO2激光预处理后,纤维束之间形成的空隙结构增大了与黏合剂的接触面积,使得CFRP表面的黏结性能得到了进一步提升.
Abstract
Improving the bonding strength in carbon fiber-reinforced plastics(CFRP)is important for the increasingly growing functional use of these materials.Here,we investigated and compare the effects of a pulse CO2 laser-based surface treatment on the bond strengthening of CRFPs.The microscopic morphology,wettability,chemical composition and mechanical properties of the sample surface were characterized by using scanning electron microscopy,laser confocal microscopy,contact angle measurement,X-ray photoelectron spectroscopy and tensile testing machine.The mechanisms of different surface treatment methods on the bond strength of CFRPs were compared and analyzed.The results showed that the selective removal of resin and the induction of oxygen-containing functional groups on the surface layer of CFRP by the pulsed CO2 laser pretreatment were beneficial to the improvement of the bond strength between the adhesive joints.In addition,the gap structure formed between the fiber bundles after the pulsed CO2 laser pretreatment increases the contact area with the adhesive,which further improves the bonding performance of the CFRP surface.
关键词
碳纤维复合材料/脉冲CO2激光/表面预处理/黏结强度Key words
carbon fiber-reinforced plastics/pulsed CO2 laser/surface pretreatment/bonding strength引用本文复制引用
出版年
2024
NETL
NSTL
万方数据