Advancements and Challenges in the Carbon Fiber-Reinforced Polymer (CFRP) Trimming Process

Effect of Grinding Parameters on Industrial Robot Grinding of CFRP and Defect Formation Mechanism

Recent Applications of Fiber Bragg Grating Sensors in Humidity and Water Content Detection in Agriculture: A Comprehensive Review of Development, Challenges, and Future Trends

Carbon fiber reinforced polymer (CFRP), a highly engineered lightweight material with superior properties, is widely used in industrial fields, such as aerospace, automobile, and railway transportation, as well as medical implants and supercapacitor. This work presents an effective surface treatment method for the controllable fabrication of hydrophilic surface micro/nanostructures of CFRP through femtosecond laser processing. Selective removal of the epoxy resin and leaving the carbon fibers exposed are achieved when CFRP is weakly ablated by a femtosecond laser. The diameters and structures of the carbon fibers can be controlled by adjusting the laser processing parameters. Three-dimensional surface micro/nanostructures are processed when CFRP is strongly ablated by a femtosecond laser. Meanwhile, the transformation of the sp2 orbitals to sp3 orbitals of graphitic carbons of carbon fibers is induced by a femtosecond laser. Moreover, the investigation of surface roughness and wettability of femtosecond laser-processed CFRP indicates increased roughness and excellent hydrophilicity (a contact angle of 28.1°). This work reveals the effect of femtosecond laser processing on the regulation of the physicochemical properties of CFRP, which can be applicable to surface treatment and performance control of other fiber-resin composites. The excellent hydrophilicity will be conducive to the combination of CFRP with other materials or to reducing the friction resistance of CFRP used in medical implants.

Controllable Fabrication of Hydrophilic Surface Micro/Nanostructures of CFRP by Femtosecond Laser

From the point of view of production, it is of fundamental importance to know the cutting parameters at which the new surface of the component was created because only in this way is it possible to understand the nature and properties of the created surface. Based on the information obtained, it is then possible to improve the processes used or to create machined surfaces with, if not zero, at least a minimum number of flaws. The main purpose of the article is to create a comprehensive overview of the behavior and properties of the selected material with a focus on the prediction of roughness depending on the cutting speed and depth of cut, Vickers microhardness evaluation, assessment of cutting tool wear, and assessment of the shape and structure of the resulting chip. The achieved results are recorded in graphical and verbal form, from which the necessary conclusions are drawn. From the performed analyses, a mathematical prediction of determining the quality of the machined surface was created, which reflects changes in roughness depending on the cutting speed in the three modifications (700 m/min, 1400 m/min, and 2000 m/min). Conclusions were also drawn regarding the characteristics of the resulting chip and the wear of the cutting edges depending on the change in cutting speed. The fluctuating course of surface roughness when changing the cutting speed can be considered a significant finding—at 1400 m/min, the surface roughness was expected to have a decreasing tendency; however, it increased; a decreasing tendency was not recorded until at speeds of 1800 m/min, but during this process, the material already crept.

/pdf/research-on-roughness-and-microhardness-of-c45-material-2rchysf7.pdf

Research on Roughness and Microhardness of C45 Material Using High-Speed Machining

Efficient Analysis of CFRP Cutting Force and Chip Formation Based on Cutting Force Models Under Various Cutting Conditions

Cost-Effective Calibration of Collaborative Robot Arm with Single Wire Encoder

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Efficient Analysis of CFRP Cutting Force and Chip Formation Based on Cutting Force Models Under Various Cutting Conditions

Cost-Effective Calibration of Collaborative Robot Arm with Single Wire Encoder