发射不同被甲材料弹头各向异性身管膛内应力状态  

Stress States of Anisotropic Material Gun Barrel by Firing the Projectiles with Different Jacket Materials

作　　者：盖钟雨 周克栋[1] 陆野[1] 刘锦豪 GE Zhongyu;ZHOU Kedong;LU Ye;LIU Jinhao(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《兵工学报》2024年第11期4119-4132,共14页Acta Armamentarii

基　　金：基础加强计划重点基础研究项目(208052021185)。

摘　　要：为研究某小口径步枪发射过程中身管膛内的应力场与温度场,建立弹头膛内运动时期弹头/身管相互作用的精细热力耦合有限元模型,其中考虑了温度对身管与被甲材料力学性能的影响以及枪管钢力学性能的各向异性。仿真获得覆铜钢被甲弹头和铜被甲弹头挤进运动规律与身管膛内应力状态变化。研究结果表明:被甲材料的不同对挤进过程有很大影响,钢被甲弹头挤进阻力大于铜被甲,相应地前者膛内应力也大于后者;身管不同轴向位置处应力分布规律不同,坡膛处内膛应力最大值在阳线导转侧,膛口处内膛应力最大值在阴线上。研究结果为优化弹头/枪管匹配提供了支持。The stress field and temperature field of barrel in the firing process of a small caliber rifle are studied.An accurate thermo-mechanical coupling finite element model of the projectile/barrel interaction during the motion of projectile in the barrel is established,in which the effect of temperature on the mechanical properties of barrel and jacket materials and the anisotropy of the mechanical properties of barrel steel are considered.The engraving motion patterns of steel and copper jacketed projectiles,and the change of stress state in the barrel are obtained by the numerical simulation.The simulated results show that the different materials of projectile jacket have great influence on the engraving process,the engraving resistance of steel jacketed projectile is greater than that of copper jacketed projectile,and the in-bore stress of steel jacketed projectile is also greater than that of copper jacketed projectile.The stress distributions at different axial positions of barrel are different,the maximum stress at the chamber throat is on the land driving side,and the maximum in-bore stress at the muzzle is on the groove.This work is conducive to the optimization of projectile/barrel matching.

关 键 词：身管 热力耦合 被甲材料 各向异性材料 材料热物理特性 弹头挤进 

分 类 号：TJ203.1[兵器科学与技术—武器系统与运用工程]