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Information × Registration Number 0224U032928, (0124U003362) , R & D reports Title Study of the interaction of a femtosecond laser pulses with carbon fiber reinforced structural plastics popup.stage_title Обгрунтування вибору методів регулювання процесу лазерного різання і текстурування. Лазерна обробка базових вуглепластиків Head Oleksii V. Myronyuk, к.т.н. Registration Date 11-12-2024 Organization National Technscal University of Ukraine "Kiev Polytechnic Institute". popup.description1 Development of methods for increasing the productivity of laser cutting and texturing of carbon fiber-reinforced plastic by adjusting the operational parameters of the femtosecond laser, the composition and structure of the polymer composite popup.description2  The main problem to be solved in this work is to increase the efficiency and reduce the degree of defectiveness of laser cutting and texturing of carbon fiber by using a femtosecond laser, adjusting its operating parameters, and reasonably modifying the composition and structure of the polymer composite. In this work, femtosecond laser pulses were used, the operating parameters of which will be optimized, as well as a number of carbon fiber composites with a polymer matrix modified in terms of beam energy absorption and dissipation. The aim of the work is to develop methods for improving the performance of laser cutting and texturing of carbon fiber-reinforced plastic by adjusting the operating parameters of the femtosecond laser, the composition and structure of the polymer composite. At this stage of execution, the distance between the pulses of the femtosecond laser processing unit was optimized. As a result, the best pulse spacing of 1.4 μm was obtained, which corresponds to 64 % overlap between pulses at the best pulse duration. The best pulse duration is 190 fs. With the new laser system configuration, high laser multi-scan cutting speeds are demonstrated: 516 mm/s with a low sidewall roughness of 0.96 μm. Additionally, a practical method for estimating the wetted surface for the Cassie equation based on measuring the wetting angles with test liquids with different surface tensions was proposed. The method allows to quickly evaluate the ability of textures to repel liquids, compare the quality of hydrophobic materials, and determine the coefficients of the Cassie-Baxter equation without complex indirect methods. It uses simple equipment, calibrated liquids, and is suitable for evaluating changes in surface energy after treatment. Product Description popup.authors Bilousova Anna O. Baklan Denys V. Vasyliev Heorhii S. Viktoriia I. Vorobiova Dorohan Nataliia O. popup.nrat_date 2024-12-11 Close