冲击载荷下橡胶的力学性能研究

Study on Mechanical Properties of Rubber under Impact Load

对半圆形橡胶垫进行准静态试验,基于一阶Ogden模型拟合准静态橡胶参数。对橡胶试件进行5个应变率下的单轴压缩试验,通过插值拟合编写考虑不同应变率橡胶材料参数的子程序。使用准静态橡胶参数和考虑不同应变率下橡胶参数分别对转向管柱进行落锤冲击仿真分析。结果表明:不同应变率下,橡胶参数能够准确地表现出橡胶材料在受到冲击载荷下的力学性能。

The quasi-static test of semicircular rubber pad was carried out, and the quasi-static rubber parameters were fitted based on the first-order Ogden model. The uniaxial compression tests of rubber specimens at five strain rates were carried out, and the subprogram the parameters of rubber materials at different strain rates was compiled by interpolation fitting. The quasi-static rubber parameters and the rubber parameters at different strain rates were used to simulate the drop mass collision of the steering column. The results show that the mechanical properties of the rubber material under the impact load can be characterized by the accuracy of the rubber parameters under different strain rates.