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정재민(Jae Min Jung),김성하(Sung Ha Kim),문성남(Sung Nam Moon),이미현(Li Meixian),이우일(Woo Il Lee) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Carbon fiber reinforced plastic (CFRP) has been widely used in many industrial fields, such as automobile, aerospace, and leisure/sports industry because of their high strength, low density, good corrosion resistance and so forth. However, it is week for frequent vibrated structure for its low vibration damping ability. Therefore, recently, many studies have been conducted to improve the vibration damping of CFRP. Piezoelectric materials can transform strain energy into electrical energy due to its peculiar crystal structure, and carbon fiber can act as proper electrical conductor. In this study, lead zirconate titanate (PZT) ceramic particle which is one of typical piezoelectric material is dispersed in CFRP laminate in order to improve the vibration damping ability by converting vibrational energy into electrical energy and thermal energy. The loss factor (tanδ) is measured by DMA (Dynamic mechanical analyzer) which is used to measure the dynamic mechanical behavior of a material to verify the change in vibration damping. Experiments were performed using titanium dioxide (TiO2) particles which do not have piezoelectricity to investigate the increase of vibration damping ability due to interfacial friction. The results show that there exists difference on vibration damping ability between CFRP with PZT ceramic particles and CFRP with TiO2 particles.