玻璃纤维芯-铅网增强橡胶复合材料动态性能

制备了具有不同结构和界面结合强度的玻璃纤维芯2铅网增强橡胶复合材料( GF- Pb/ R) , 并通过测试复合材料的力滞回线, 研究了其在3～20 Hz 时的动态性能。结果表明, GF- Pb 网增强结构可以同时提高橡胶的动态力学性能和阻尼性能, 其中GF-Pb 网垂向增强方式的性能改善效果明显, 当GF-Pb 网体积分数为4 %时, 其动刚度和损耗因子的提高率可分别达到49 %和25 %。GF- Pb/ R 复合材料阻尼性能是材料阻尼、界面微滑移阻尼、Pb 塑性变形阻尼等多种阻尼机制共同作用的结果。界面粘结强度显著影响了复合材料的力学性能和阻尼行为: GF-Pb/ R 刚度随界面结合强度的增大而提高; 损耗因子按照界面中等强度结合、强结合、弱结合的顺序递增。 

Dynamic properties of glass-fiber-cored lead-net reinforced rubber composite

Glass2fiber cored lead-net ( GF-Pb net) reinforced rubber composites ( GF-Pb/ R) with different st ructures and different interfaces were prepared. And their dynamic properties were studied within 3～20 Hz by testingtheir hysteresis loop s. It tells that the dynamic mechanical property and damping property of GF-Pb/ R are improvedsimultaneously. The increasing ratios of dynamic properties of GF- Pb net vertically reinforced rubber composite(V- GF-Pb/ R) are higher than those of GF- Pb net horizontally reinforced rubber composite ( H- GF- Pb/ R) . Andthe increasing ratios of dynamic stiffness and damping loss factor are 49 % and 25 % for V- GF- Pb/ R with theGF-Pb net volume f raction of 4 %. It is concluded that the damping of GF- Pb/ Rresults from material damping ,micro-slippage damping and damping f rom micro-plastic deformation of lead. The interface bond st rength influencesthe mechanical property and the damping behavior of GF- Pb/ R remarkably. The dynamic stiffness of GF-Pb/ Rincreases with increasing the interface bond st rength. However , the loss factor is a maximum when the interfacebond st rength is between weak bond and st rong bond.