土壤动态冲击压缩性能实验研究

为获得不同侵彻体在土壤中的衰减规律，采用分离式Hopkinson压杆实验装置，分别对不同参数的土壤材料进行了冲击压缩性能实验，得到了相应的应力-应变曲线. 根据实验结果，从土壤材料的密度、质地及含水体积分数3个方面分析了其动态响应特性，得出了在动态冲击载荷作用下土壤材料各种参数对其动态力学性能的影响. 研究结果表明:随着密度的增大，土壤的动态冲击应力峰值一般会增大；黏土质地土壤的应力峰值一般较大，且应力的下降速度较慢；土壤中含水体积分数对砂土和壤土质地土壤的应力峰值影响不大，但对黏性质地土壤却有非常大的影响. 

Experimental Study on Dynamic Performances of Soil Under High Strain Rates

In order to acquire the attenuation law of different penetrator in soil for researching on detonating unexploded explosive ordnance with shape charge, the impact compression test was carried out with separated Hopkinson pressure bar and the overall process curves for stress-strain were gained. Results show that with the increase of soil density the impact stress peak of soil will rise, the impact stress peak of clay loam is comparative big and the rate of descent of impact stress is comparative slow; the water content of soil influences intensity on the clay loam in impact stress peak but the sand clay loam and the medium clay loam, the conclusion provides the foundation for researching attenuation law of different penetrator in soil.