超弹性本构模型对橡胶隔振器静态特性预测影响的研究  

A Study on the Effects of Hyperelastic Constitutive Models on the Static Characteristic Prediction of Rubber Isolator

作　　者：王文涛[1,2] 上官文斌[1,3] 段小成[1,3] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640 [2]广州城市职业学院机电工程系,广州510405 [3]宁波拓普集团股份有限公司,宁波315800

出　　处：《汽车工程》2012年第6期544-550,539,共8页Automotive Engineering

基　　金：国家自然科学基金项目(50975091)资助

摘　　要：通过对某橡胶材料标准试件的单轴拉伸、平面拉伸和等双轴拉伸的应力-应变数据的测试,并利用最小二乘原理识别了5种常见橡胶超弹性本构模型的参数,对比了不同模型间的拟合精度。以某款车型的橡胶隔振器为实例,计算不同本构模型在3种典型工程应变下的力-位移曲线,并与实测数据进行对比。结果表明,Mooney-Rivlin模型在处理较小应变数据时具有较好的计算精度和计算稳定性,Van der Waals模型和3阶Ogden模型在处理较大应变数据时具有较好的计算精度。The stress-strain data in uniaxial, planar and biaxial tension tests of standard rubber specimen are measured, based on which the parameters of 5 common hyperelastic constitutive models are identified with least square principle, and the fitting accuracies of different models are compared. Then taking the rubber isolator of a re- al vehicle as an example, its force-displacement curves under three typical engineering strains with different consti- tutive models are calculated and compared with measured data. The results show that in dealing with smaller strain values, Mooney-Rivlin model has the highest accuracy and computational stability among all the models, while in dealing with large strain values, Van der Waals model and Ogden3 model have better accuracies than other models.

关 键 词：橡胶 超弹性本构模型 力-位移特性 计算精度与稳定性 模型参数识别 

分 类 号：TB535.1[理学—物理]