基于Johnson-Cook本构模型的弹带挤进过程数值模拟  

Numerical Simulation of Rotating Band Engraving Process Based on Johnson-Cook Constitutive Model

作　　者：王鹏[1] 杨国来[1] 葛建立[1] 孙全兆[1] 梁传建[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《弹道学报》2015年第2期55-61,共7页Journal of Ballistics

基　　金："973"计划项目(51319702);国家自然科学基金项目(11172139)

摘　　要：采用非线性有限元数值模拟的方法对某大口径火炮弹带挤进过程的力学机理进行了研究。基于JohnsonCook动态本构模型并结合实验测试数据,在有限元软件ABAQUS中建立了挤进过程的非线性动力学模型,利用显式数值积分算法对弹带挤进过程的非线性动力学进行了数值模拟。通过数值计算,分析了弹带刻槽形成过程,得到了弹丸挤进运动规律、动态挤进阻力及挤进压力值,获得了摩擦性质对弹带挤进过程的影响规律。结果表明:摩擦系数越大,挤进时间越长,挤进阻力越大,对应的挤进压力也就越高。研究结果可为大口径火炮、弹丸和装药设计研究提供一定的参考。The mechanism of the rotating band engraving process of a large-caliber gun was studied by the methods of nonlinear finite element simulation.Based on Johnson-Cook constitutive model and combined with the experimental data,the nonlinear dynamic model of the engraving process was established in the finite element analysis software ABAQUS.The nonlinear dynamics of the rotating band was simulated using the explicit numerical integration algorithm.Through numerical calculations,the formation process of bearing band notch,the movement law of the projectiles and the variation law of the engraving resistance were analyzed,and the mechanism of rotating band engraving process was concluded,and the variation law of the rotating band engraving process caused by the friction was explored.The result shows that with the increase of the friction coefficient,the engraving time extends,and the engraving resistance increases,and the engraving pressure increases.These research results provide reference for the study on design of the largecaliber gun,projectile and gun charge.

关 键 词：火炮 弹带挤进 本构关系 挤进阻力 数值模拟 

分 类 号：TJ31[兵器科学与技术—火炮、自动武器与弹药工程]