PBX炸药损伤本构模型及其工程运用  

Damage Constitutive Model of PBX Explosive and Its Engineering Application

作　　者：黄垂艺 时岩[1] 金朋刚[2] 陈凯 HUANG Chui-yi;SHI Yan;JIN Peng-gang;CHEN Kai(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing,210094,China;Xi′an Modern Chemistry Research Institute,Xi′an,710065,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]西安近代化学研究所,陕西西安710065

出　　处：《含能材料》2022年第3期188-196,共9页Chinese Journal of Energetic Materials

基　　金：西安近代化学研究所开放合作创新基金(SYJJ03)。

摘　　要：为了对高聚物黏结炸药(PBX)在动态冲击载荷下可能产生的损伤进行研究,采用分离式霍普金森杆(SHPB)试验装置获得了PBX炸药材料在不同应变率条件下出现力学损伤的本构曲线,并基于含损伤变量的Z‑W‑T本构模型对本构曲线进行了分段拟合。然后基于拟合结果、有限元理论、弹塑性力学与ABAQUS/VUMAT语法编写了PBX炸药含损伤材料子程序,并对该子程序进行了有限元验证及有限元工程算例计算。结果表明:有限元验证得到的结果与试验结果吻合良好,相关度在0.95以上;破片侵彻算例计算得到的应力云图与损伤变量云图反映PBX炸药材料在冲击载荷下发生的变化及可能产生损伤的部位;并且损伤云图的演化过程反映了PBX炸药材料损伤演化与应变率效应的相关性。In order to study the damage of polymer bonded explosive(PBX)under dynamic shock loads,the constitutive curve of the mechanical damage of PBX under different strain rates was obtained by using the Split‑Hopkinson pressure bar(SHPB)test device.And the constitutive parameters in the Z‑W‑T constitutive model with damage variables were fitted in sections.Then,based on the fitting results,the finite element theory,elastoplastic mechanics and ABAQUS/VUMAT,the subroutine of PBX containing damage is completed,and is verified by the finite element simulation.The model is used for finite element engineering exam‑ples.Results show that the verification results of finite element samples are in good agreement with the experimental results,and the correlation degree of the results is higher than 0.95.The stress cloud diagram and damage variable cloud diagram for fragment penetration example reflect the change and possible damage location of PBX under shock loads.The evolution process of damage cloud diagram reflects the correlation between damage evolution and strain rate effect of PBX.

关 键 词：高聚物黏结炸药(PBX) 本构曲线 含损伤Z‑W‑T本构模型 材料子程序 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]