Numerical simulation study on high-speed impact of WFeNiMo high entropy alloy projectile on steel target
With the increasing protection capability of modern weapons and equipment,the demand for improving the penetration ability of armor piercing shells has become stronger,and higher requirements have been put forward for the efficient destructive ability of armor piercing shells.Conventional armor piercing shell materials can no longer meet the needs of penetrating and destroying targets today.Due to its flexible composition design and excellent mechanical properties,high entropy alloys have the potential to replace depleted uranium and tungsten alloys as armor piercing core materials.A high-speed impact experiment of WFeNiMo high entropy alloy pellets on steel targets was conducted using a two-stage light gas gun.The voltage signal generated by the impact of the pellets on the copper mesh was used to synchronously trigger the high-speed camera.Using high-speed cameras to capture the high-speed collision process of projectiles,the impact velocities were determined to be 1072m/s and 1346m/s,respectively.The target plate thicknesses are 4mm and 10mm,respectively.The damage modes of WFeNiMo high entropy alloy pellets on steel targets are pitting and penetration.Meanwhile,the material point method(MPM)was used to numerically simulate the impact process of WFeNiMo high entropy alloy pellets on steel targets.Compare the experimental results of WFeNiMo high entropy alloy projectile high-speed impact on steel targets with the MPM numerical simulation results in terms of borehole diameter,penetration depth,remaining projectile length,and flap height.The research results show that the average error between MPM numerical simulation results and experimental results is about 2%,and the MPM target damage morphology is consistent with the experimental damage morphology.MPM is suitable for numerical simulation of high-speed impact and can simulate the process of projectile penetration into the target plate well,with high simulation accuracy and less calculation time.
WFeNiMo high entropy alloyHigh speed impactMPM numerical simulation
万方数据
维普
