金属靶体材料动力硬度测试及动态阻力分析

以高速侵彻下45钢靶体侵彻阻力为研究对象,开展了弹体高速侵彻45钢靶体试验,获取了典型弹体对45钢靶体的成坑参数。基于高速侵彻阻力模型对靶体侵彻阻力及影响因素进行分析。结合流体动力学侵彻模型对不同弹体材料侵彻45钢靶体侵彻深度规律进行研究。研究结果表明:随着撞击速度的增大,45钢的靶体阻力从5. 13 GPa减小到3. 7 GPa;基于材料动力硬度测试方法的靶体动态阻力测试结果和理论计算结果吻合较好;随着靶体动态屈服强度的增大,靶体阻力呈线性增大的趋势;侵彻深度及靶体动态阻力理论计算结果和试验数据吻合较好,说明所提动态阻力确定方法可行,可为高速侵彻动力学研究提供参考。

Analysis of dynamic resistance and dynamic hardness test of metal target material

Experiments on 45 steel with high-velocity impact were carried out in order to study the target resistance. Then the influence of impact velocity and target parameters on the penetration resistance was analyzed by the calculation model. Also, the DOP (depth of penetration) of different projectiles penetrating 45 steel targets were studied based on the hydrodynamic penetration model. It was shown that the experimental results of penetration resistance based on the material dynamic hardness test method agrees well with the theoretical calculation results of hydrodynamic penetration model. Simultaneously, with the increase of impact velocity, the target resistance reduces from 5.13 GPa to 3.7 GPa. Also, the target resistance shows linear trend increase with the increase of the dynamic yield strength of targets. The DOP calculated by the hydrodynamic penetration model agrees well with the corresponding experimental data. All of these proved that the method to obtain dynamic resistance is feasible, thus can provide a reference for hypervelocity penetration dynamics research.