轨道用橡胶扣件Mooney-Rivlin模型参数确定及压缩变形的有限元模拟

摘要

The parameters of the strain-energy model,namely Mooney-Rivlin model,which is suitable for a small deformation rubber,was determined by the virtual work equation of strains and stresses.The 3D model of the rubber fastener was established and the displacement and stress distributions were simulated by the finite element software of Abaqus.The force and displacement curve was also obtained and the simulation results were verified by the experiments.The results show that the stress distribution of the rubber fastener simulated with the determined parameters C10 and C01 coincided well with the real stress state.The maximum compressive displacement was about 3 mm.The simulated force-displacement curve was in accordance with that by experiment.The Mooney-Rivlin model can be used to analyze the deformation of the rubber fastener.%利用应力、应变的虚功方程确定了适用于小变形橡胶的应变能模型——Mooney-Rivlin模型的参数;建立了橡胶扣件的三维模型,通过Abaqus有限元软件模拟了扣件变形的位移和应力云图,得到了力-位移曲线并进行了试验验证.结果表明:通过确定的C10,C01参数模拟得到橡胶扣件的应力分布与扣件实际受力相符合,最大压缩位移约为3 mm;模拟得到的力-位移曲线与试验得到的基本吻合,Mooney-Rivlin模型可以用于模拟橡胶扣件的变形情况.