泡沫硅橡胶冲击压缩性实验研究

STUDY ON THE SHOCK COMPRESSION OF FOAM SILICON RUBBER

采用锰铜计技术，通过测量冲击波压力获得材料雨贡纽数据的技术路线，给出了初始密度为０．９２ｇ／ｃｍ３的泡沫硅橡胶在６～３３ＧＰａ范围内的雨贡纽关系，精度优于国内外相关工作。对本实验锰铜计的典型信号作了较为详细的分析，通过数值模拟很好地重现了该非常规信号。此外，采用先前Ｗｕ等建立的疏松材料雨贡纽模型进行了预估计算，预估结果与实验结果符合很好，表明该模型不但适用于金属、岩石矿物等，亦可广泛应用于高聚物疏松材料的冲击压缩性研究。

An investigation has been carried out for the shock compression of the foam silicon rubber (FSR) with initial density of 0.92g/cm 3.In the pressure range from 6GPa to 33GPa,the Hugoniot relation between shock velocity D and particle velocity u has been obtained: D=1.686+1.367u .Compared with the relative results published previously,it is demonstrated that our experimental data are reasonable and have higher precision. Manganin gauges have been used in the experiments to determine the shock pressures,of which the signals differed greatly from the normal ones.The reasons for this phenomenon are analyzed carefully and further verified via 1D simulation. Moreover,the W J model which is independent to our experiment thoroughly has been applied to predict the shock compression of the FSR.The prediction has a good agreement with the experimental results.It shows that the W J model is suitable not only for metals or minerals but also for porous polymer.