弹带挤进过程身管内壁损伤的数值模拟研究  

Numerical simulation for gun barrel bore damage during shells with into bore

作　　者：刘广生[1,2] 孙河洋[2] 周伟[3] 

机构地区：[1]陆军军官学院,合肥230031 [2]军械工程学院,石家庄050003 [3]北京军代局,北京100042

出　　处：《振动与冲击》2015年第13期78-82,共5页Journal of Vibration and Shock

摘　　要：针对火炮发射过程中内膛的损伤、裂纹萌生和扩展问题,基于HLC细观损伤本构模型建立了相应的损伤力学有限元数值计算方法,将完全隐式应力更新算法与显式有限元计算相结合,通过用户自定义材料子程序VUMAT将损伤模型嵌入到有限元软件ABAQUS/EXPLICIT模块中。对某型火炮多发射击工况下内膛损伤破坏过程进行了数值模拟计算,分析了弹带挤进内膛过程中身管内壁材料性能随射弹发数变化的规律,并与实验进行了对比。结果表明:HLC细观损伤模型可以有效揭示身管内膛复杂的损伤行为并预测破裂缺陷,为火炮身管安全性设计提供有益的参考。A damage mechanics finite element numerical computation method was established based on HLC microscopic damage model to solve problems of gun barrel bore damage,crack initialization and growth during gun firing. With this method,the completely implicit stress renewing algorithm was combined with the explicit finite element computation,the damage model was embedded into the finite element software ABAQUS /EXPLICIT module with a VUMAT subroutine.The damage and failure process of the barrel bore of a certain type of gun was simulated numerically during multiple rounds of firings.The law of the barrel bore material performance changing with the number of firing rounds was analyzed during shells with into bore and the simulated results were compared with the experimental ones.The results showed that HLC microscopic damage model can reveal the complicate damage behavior of the barrel bore and predict its cracking defects.The results provided a reference for safety design of gun barrels.

关 键 词：细观损伤本构 冲击 身管 VUMAT 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]