橡胶大变形不可压缩方法试验数据处理

摘要

为提高本构关系的精度,提出用橡胶大变形不可压缩的方法来处理试验数据.根据橡胶材料单轴压缩试验数据,分别采用GB/T 7757方法和新提出的数据处理方法进行处理,得到橡胶材料的两种本构关系,并分别将其导入ABAQUS有限元分析软件模拟试验过程.研究结果表明,采用新方法计算的试样最大轴向变形量与试验测试数据的误差为20.4％,而GB/T 7757方法的误差为34.7％.大变形不可压缩方法可明显提高处理橡胶本构关系的精度.%In order to improve the accuracy of rubber constitutive relation,a new method based on incompressible large deformation analysis was presented for the data processing of rubber testing.Based on the uniaxial compression test data of rubber materials,the data were processed by GB/T 7757 method and the new method to get two rubber material constitutive relations,and the testing process was simulated by importing the two constitutive relations into ABAQUS finite element analysis software,respectively.The results showed that,compared to the test data,the error of the maximum axial deformation of test specimen calculated by the new method was only 20.4％,and lower than that by GB/T 7757 method,which was 34.7％.The accuracy of rubber constitutive relation could be significantly improved by using the incompressible large deformation method.