摘要
首先,介绍了力函数的确定方法包括经验法、理论分析法和数值模拟法.其中经验法中给出了Forrestal半经验公式和改进的Wen半经验公式;理论分析法中详细介绍了空穴膨胀理论及其研究进展;数值模拟方法中模拟了半无限大材料中的球形和柱形空穴膨胀模型,并将模拟得到的结果与理论解进行了比较,发现二者吻合得很好.最后,给出了靶体响应力函数在侵彻力学中的应用.
The approaches to determining the forcing function including empirical, analytical and computational methods were reviewed. In empirical methods, Forrestal＇s semi-empirical equation was given whilst Wen＇s semi-empirical equation was modified to obtain the empirical transient forcing functions; in analytical methods, cavity expansion approximations were described; in computational methods, finite element method was used to simulate the cavity expansion and the numerically obtained radial stress on the cavity surface was found to be in good agreement with that derived theoretically. Finally, the applications of the analytical forcing function in Penetration Mechanics were discussed.
基金
南京信息工程大学科研基金资助.
关键词
靶体响应
力函数
侵彻
弹丸
靶板
空穴膨胀理论
数值模拟
target response
forcing function
penetration
projectile
target
cavity expansion theory
numerical simulation
