炸药与不同材料之间摩擦系数的研究

Research on the Friction Coefficient between Explosive and Different Materials

采用分离式霍普金森压剪杆装置,对GO-924炸药与铝合金、橡胶、GO-924炸药之间在不同冲击加载条件下的摩擦系数进行了研究,得到了炸药与不同材料界面间的摩擦系数随时间变化的曲线。结果表明：炸药与铝合金之间的动摩擦系数维持在0.166～0.176范围内,且不随冲击加载速率的变化而变化;炸药与橡胶之间的动摩擦系数在运动过程中不断增大,其数值与冲击加载速率相关;炸药与炸药之间的动摩擦系数在运动过程中先增大,达到峰值后迅速下降,分析认为这种现象与炸药内部产生损伤有关。

Using split Hopkinson compression-shear bar, the friction coefficients between GO-924 explosive and three materials including aluminum alloy, rubber, and GO-924 explosive itself were investigated under different shock loading conditions. The results show that the rules of the 3 friction coefficient curves are different. For aluminum alloy,the friction coefficient varies between 0. 166 and 0. 176 and is independent of impact speed;for rubber,the friction coefficient increases steadily and is sensitive to impact speed;the friction coefficient between explosives increases at first and then decrea- ses, which is likely to relate to explosive damage.