圆柱形橡胶试样压缩变形有限元分析的超弹性本构方程对比研究  

Finite Element Analysis of Compressive Deformation for Cylindrical Rubber Components Based on Hyperelastic Constitutive Models

作　　者：杨海波[1] 刘枫 李凡珠[1] 卢咏来[1] 张立群[1] YANG Haibo;LIU Feng;LI Fanzhu;L U Yonglai;ZHANG Liqun(Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《橡胶工业》2018年第10期1085-1093,共9页China Rubber Industry

基　　金：国家重点基础研究发展计划(973)项目(2015CB 654705)

摘　　要：采用有限元分析方法预测圆柱形橡胶试样的压缩变形,并与试验数据进行对比,判断不同本构方程的计算精度。结果表明:对于应力-应变试验,仅采用单轴拉伸(UT)试验数据拟合本构方程时,不能单纯依赖拟合精度判断本构方程的优劣;同时采用UT、平面拉伸(PT)和等双轴拉伸(ET)试验数据拟合本构方程时,整体计算精度大幅提升,且可依据拟合精度判断超弹性本构方程的优劣。对于超弹性本构方程,若提供UT,PT和ET试验数据,宜选用拟合精度高的O_Ni,P_Ni,VdW,Marlow等方程;而在仅有UT数据的情况下,则宜选用RP_Ni,AB,Marlow等方程。The finite element analysis method was used to predict the compression deformation of cylindrical rubber component,and the results were compared with the experimental data to evaluate the calculation accuracy of different constitutive equations. The results showed that for the stress-strain test,when only the uniaxial tensile（UT） test datas was used to fit the constitutive equation,the accuracy of the constitutive equation could not be solely evaluated by the fitting precision.The overall precision of calculating results was greatly improved when UT,planar tensile（PT） and equibiaxial tensile（ET） test data were all used to fit the constitutive equation,and the merits of the superelastic constitutive equation could be judged according to the fitting precision.For the superelastic constitutive equation,the high fitting precision equations of O_Ni,P_Ni,VdW,Marlow,etc. could be used if the UT,PT and ET test data were all provided;while RP_Ni,AB and Marlow equations could be used if only UT data was provided.

关 键 词：橡胶材料 圆柱形试样 压缩变形 本构模型 单轴拉伸 平面拉伸 等双轴拉伸 有限元分析 

分 类 号：TQ330.7[化学工程—橡胶工业] O241.82[理学—计算数学]