DEVELOPMENT OF HIGH DAMPING CFRP/SDR SANDWICH COMPOSITES

摘要

Carbon fiber reinforced Plastics (CFRP) has been well developed for many engineering structural components in the aircraft, automotive and modern space industries in the last few decades due to its light-weight and excellent mechanical properties. However, the reduction of vibration and noise for CFRP is as poor as metal materials. In this paper, the innovative CFRP/SDR sandwich materials with damping rubber sheet were developed and their mechanical and damping behaviors were investigated by three point bending test, mechanical impedance method and dynamic mechanical analysis (DMA), respectively. As a result, it is shown that the mechanical and damping properties of the developed 8 types of CFRP/SDR sandwich laminates depend deeply on the fiber orientation of lamina, the property of rubber sheet and its layer number and sequence. The dependence of damping property on temperature is discussed in detail. The loss factors for the developed materials are over 0.3 under DMA, even reaching 0.45 for the material A2. And either bending modulus or loss factor of the material C1 was large among the 8 types of materials. Among these materials, the optimal sequence for the CFRP and SDR sheet is obtained, which showed excellent mechanical and damping properties.