Development of a measuring system for on-line in situ monitoring of composite materials manufacturing |
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| Affiliation: | 1. University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering, Univerzitní 8, 306 14 Pilsen, Czech Republic;2. Technofiber s.r.o., Lazaretní 7, 615 00 Brno, Czech Republic;3. 5M s.r.o., Na Záhonech 1177, 686 04 Kunovice, Czech Republic;1. Molecular Model Discovery Laboratory, Department of Chemistry and Biotechnology, School of Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria, 3122, Australia;2. School of Physics and Optoelectronic Engineering, Ludong University, Shandong, Yantai, 264025, PR China;1. Department of Material Processing and Controlling, School of Mechanical Engineering & Automation, Beihang University, Beijing 100191, China;2. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;1. Advanced Composites Centre for Innovation and Science, University of Bristol, Queen''s Building, Bristol, BS8 1TR, UK;2. Department of Mechanical Engineering, University of Bristol, Queen''s Building, Bristol, BS8 1UB, UK;1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China;2. China Railway Construction Heavy Industry Corporation Limited, Changsha 410199, China;1. Center for Composite Materials, University of Delaware, Newark, DE 19716 USA;2. Department of Mechanical Engineering, University of Delaware, Newark, DE 19716 USA;3. Department of Electrical and Computer Engineering, University of Delaware, Newark, DE 19716 USA;4. Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716 USA;1. University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering, Univerzitní 8, 306 14, Pilsen, Czech Republic;2. University of West Bohemia, New Technologies – Research Centre, Univerzitní 8, 306 14, Pilsen, Czech Republic |
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| Abstract: | A unique portable measuring system using an impedance spectroscopy method with a self-adapting frequency of measurement is introduced. The system is intended for the on-line in situ monitoring of composite materials curing under industrial conditions. The capabilities of the developed system are demonstrated through the results obtained from on-line in situ measurements of unreinforced thermosetting resin, as well as of composites under real manufacturing conditions. Observations are supported by the results of other established methods for determining the degree of curing: temperature-modulated differential scanning calorimetry (MDSC), Fourier transform infrared spectroscopy (FT-IR) and broadband dielectric spectroscopy (BDS). Compressive and bending tests were also carried out on manufactured composites removed at different stages of the post-curing phase. Due to the self-adapting frequency, the system has enhanced sensitivity in the post-cure phase when the diffusion-controlled reactions proceed and, therefore, is suitable also for the analysis of hard post-cure samples. |
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| Keywords: | A. Polymer-matrix composites (PMCs) B. Cure behavior D. Process monitoring E. Braiding |
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