为了研究白麻花岗岩在高强度弹体中高速侵彻条件下的力学损伤响应，运用显式动力学有限元分析软件LS-DYNA，应用经SHPB试验验证的HJC材料模型，开展了弹头形状系数为3、直径为ϕ20 mm、长径比为6的刚性弹体以不同初速度侵彻白麻花岗岩靶体的一系列数值模拟研究。同时，针对传统有限元方法难以解决材料大变形导致的网格畸变等问题，采用SPH-FEM耦合方法对靶体进行建模。通过改变弹体配置，研究了不同弹头形状对弹体侵彻性能的影响。模拟结果表明：SPH-FEM方法可以有效模拟岩石靶体受高速冲击的力学损伤响应。由不同撞击速度与侵彻深度的关系得到了有关白麻花岗岩侵彻深度的经验公式，其中侵彻深度与撞击速度呈正比，经验公式可用于相似强度岩体的侵彻深度预测。当初速度为50，100，150，200，250，300 m/s时，平头弹侵彻深度分别为卵形弹侵彻深度的16.7%、27.8%、35.1%、32.1%、36.1%和40.5%，平头弹的侵彻性能远低于卵形弹，且侵彻损伤区域较小。

It is of great significance to investigate the penetration effect of high strength projectile on rock mass for the development of rock breaking technology in mine drilling.The penetration process is a process with large deformation of material.It is difficult for traditional finite element method to solve the problem with large deformation，which will lead to mesh distortion and calculation disruption.In order to obtain the damage responses of white granite under the condition of high speed penetration，the HJC material model was employed to model the white granite target and the projectile was assumed to be rigid.The HJC model was calibrated by the SHPB test data and the results show that the HJC model is capable to model the mechanical behavior of white granite under high strain rate conditions.The nonlinear finite element analysis software LS-DYNA was utilized and an SPH-FEM coupled method was developed to overcome the penetration problem with large deformation of granite target.A series of numerical simulation of projectile impacting white granite target with different velocity were carried out.The projectile is with diameter of 20 mm，CRH of 3 and length-diameter ratio of 6.The simulation results show that the SPH-FEM method can effectively simulate the mechanical damage response of rock target subjected to high speed impact.Based on the relationship between different impact velocities and penetration depth，an empirical formula for penetration depth of white granite is obtained，which can be used to predict the penetration depth of rock mass with similar strength.Finally，the effects of different nose shapes on penetration performance was studied. The results show that the penetration performance of flat-nose projectile is much lower than that of ogive-nose projectile，and the penetration damage area is smaller.The penetration depths of flat-nose projectile at initial velocity of 50，100，150，200，250 and 300 m/s are 16.7%，27.8%，35.1%，32.1%，36.1%，40.5% of the penetration depths of ogive-nose projectile，respectively.

http://www.goldsci.ac.cn/article/2021/1005-2518/1005-2518-2021-29-3-411.shtml