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[Laser Institute of America ICALEO? 2016: 35th International Congress on Applications of Lasers & Electro-Optics - San Diego, California, USA (October 16–20, 2016)] International Congress on Applications of Lasers & Electro-Optics - Laser radiation as a robust tool for the surface pre-treatment of FRP prior to adhesive bonding
摘要： Within the research project “ProPhoMuLA“, funded by the Federal Ministry of Education and Research (BMBF), fundamentals for innovative laser pre-treatment processes for fiber reinforced plastics (FRP) are elaborated in order to improve the adhesive joining properties of multi-material joints, e.g. FRP-FRP or FRP-metal-joints. The increasing application of material mixture results in a growing importance of the adhesive bonding technology as the most promising joining technique for multi-material joints. Until now, the use of adhesive bonding for multi-material joints is, however, connected with high process-technical expenditure. In addition, despite the successful implementation in individual applications, the methods have not yet been sufficiently developed for automotive large-scale manufacturing. One of the most important challenges is the provision of robust surface pre-treatment methods in order to ensure efficient and durable adhesively bonded joints. The possibility of in-line application is an advantage of the laser pre-treatment compared to other surface pre-treatment technologies such as sand blasting or grinding. Therefore, the application of laser pre-treatment technologies based on photonic production methods is predestined for this task. Numerical simulations are performed to analyze the influence of laser surface pre-treatment on automotive product developments. Suitable simulation methods are identified and validated regarding the functionality of the considered approach. The results of empirical investigations show that the laser pre-treatment is suitable, especially for the pre-treatment of thermoplastic FRP, where an increase of peel resistance to the factor of four in comparison to conventional pre-treatment techniques can be achieved.
关键词： photonic production methods,FRP,adhesive bonding,laser pre-treatment,surface pre-treatment
更新于2025-09-16 10:30:52
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A Review of Manufacturing Materials and Production Methods for Frequency-Selective Structures [Wireless Corner]
摘要： This article presents a review of frequency-selective structure (FSS) manufacturing materials and production methods ranging from the common printed circuit board (PCB)-based designs to textile, ink, metal, or fluid prototypes. Our work gathers some of the most relevant solutions published by the scientific community and considers several examples depicted for each case. Additionally, the main physical parameters that may have a significant impact on FSS performance have been identified, e.g., electrical conductivity of the FSS conductive element and the relative permittivity and thickness of the FSS dielectric material. Finally, a comparative analysis of the materials and techniques is presented, which highlights the benefits and limitations of each solution.
关键词： printed circuit board,relative permittivity,metal,Frequency-selective structures,fluid prototypes,textile,ink,electrical conductivity,production methods,manufacturing materials
更新于2025-09-09 09:28:46