球形弹对金属靶板侵彻问题的数值模拟

Computer simulations of the penetration of metal targets by spherical-nosed projectiles

基于球形空穴膨胀模型(SCE),采用ABAQUS有限元商业软件并结合自主开发的ABAQUS用户子程序对球形弹侵彻金属靶进行了有限元3D数值模拟。根据空穴膨胀理论,靶体对侵彻弹体的影响可以用一个作用在弹体表面的力函数代替,这样在进行数值模拟时就无需划分靶体网格,也避免了复杂的接触问题,从而使模拟大大简化。模拟过程中考虑到弹体的可变形性和入射时的微小偏航角,并且考虑了弹体在运动过程中和靶体的接触分离效应。模拟结果与文献中的实验结果进行了比较,模拟结果与实验结果吻合得很好。

Computer simulations were performed on the penetration of aluminum alloy targets by spherical-nosed steel projectiles using the commercial FEM code ABUQUS . In the simulations, the response of the targets were represented by a forcing function, which was derived from spherical cavity expansion theory. This methodology eliminated the need for discretizing the targets as well as the need for a contact algorithm. Simulations were presented for 7. 11-mm-diameter, 74.7-ram-long steel projectiles impacting 6061-T6511 aluminum alloy targets. The deformation of the projectiles and the effects of pitch and yaw were taken into account. Simulated results are in good agreement with the available exprimental data.