橡胶压缩Mooney-Rivilin本构模型参数拟合分析

Parameters Fitting Analysis of Compressive Mooney-Rivilin Constitutive Model of Rubbers

橡胶制品因其优异的超弹性能在工业界得到了广泛的应用。为了准确模拟空调室外机跌落过程中压缩机和管路的振动幅度,需要选取合适的橡胶本构模型以及材料参数。首先通过单轴压缩实验获取橡胶的应力-应变曲线,然后采用Mooney-Rivilin本构模型对曲线进行拟合,获取C01和C10值。最后利用有限元仿真再现单轴压缩实验过程,结果发现通过模拟得到的应力-应变曲线和实验获得的应力-应变曲线基本重合,最大误差4.9%,表明所获取的材料参数基本准确,为后续包装跌落、模态分析等仿真类别提供了数据支撑。

Rubber products have been widely used in industry due to their excellent hyper-elastic properties.In order to accurately simulate the vibration amplitude of the compressors and pipelines in the falling process of the outdoor air conditioners,it is necessary to select the appropriate rubber constitutive model and material parameters.In this work,the stress-strain curve of the rubber was obtained by uniaxial compression experiment,and then the curve was fitted by Mooney-Rivilin constitutive model to obtain the values of C01 and C10.Finally,finite element simulation was used to reproduce the uniaxial compression experiment process.The results reveal that the stress-strain curve obtained by simulation basically coincides with that obtained by the experiment,and the maximum difference between the two curves is 4.9%only,which indicates that the obtained material parameters are basically accurate.This work provides a data support for subsequent packaging dropping,modal analysis and some other simulation analysis.