Studies on Properties of Epoxy Resin Base Piezoelectricity Damping Carbon Fiber Composite Materials

Damping materials have been wildly used in aerospace, traffic, construction fields and so on. The piezo-damping materials have received much attention due to the novel energy loss mechanism. In this paper, piezo-damping composite materials were prepared from the epoxy resin (EP) as the resin matrix, nano lead titanate (nano-PT) ceramics as piezoelectric material and chopped carbon fibers (CF) as conductive materials. The mechanical and damping properties of the composites were analyzed by mechanics test, DMA and vibration beam method. The results showed that when the nano-PT content was 60% of EP and CF content was 0.25% of EP, the composite got the better mechanical properties. Form DMA, the loss factor (tan delta) peak reached 0.58. Damping temperature range Delta T (tan delta>0.3) was about 36.3 degrees C. In comparison, damping loss factor measured by Vibration beam method was 0.82.