Development of Glass Fabric Reinforced SDR Damping Material and its Mechanical Behavior
Fei CHENG, Qing-Qing NI and Masaharu IWAMOTO
Abstract:Materials with both of high modulus and high damping properties are necessary in many industrial fields. Super damping rubber (SDR) has high damping properties, but it has some disadvantages in mechanical properties. In this paper, a series of glass fabric reinforced polyurethane super damping rubber materials (GFRR) were developed with high strength and high damping properties for the wide use of vibration reduction. The mechanical properties, such as tension, peeling and shearing of bonding interface, were investigated, which are much superior than SDR. For the application in vibration reduction, the composite loss factor was measured by the mechanical impedance method with a free-layer damping system, while the damping properties of viscoelastic layers were conducted by the dynamic mechanical analysis (DMA). Using the RKU model, the dependences of temperature and thickness ratio of composite loss factor were analyzed. The agreement between the experiment and the analysis suggests that the composite loss factor can be predicted with a good accuracy by RKU model. Key Words:Super damping rubber, Glass fabric, Mechanical property, Composite loss factor, Dynamic mechanical analysis, RKU model