第45卷第2期国防科技大学学报Vol.45No.22023年4月JOURNALOFNATIONALUNIVERSITYOFDEFENSETECHNOLOGYApr.2023doi:10.11887/j.cn.202302023http://journal.nudt.edu.cn双箭头负泊松比结构抗侵彻性能*刘洋佐,马大为,任杰,仲健林,赵昌方(南京理工大学机械工程学院,江苏南京210094)摘要:采用数值模拟方法研究了双箭头负泊松比多胞结构抗子弹侵彻性能,对比分析了顶边撞击、铰点撞击、侧边撞击三种弹靶作用条件下子弹的侵彻行为与双箭头负泊松比结构的破坏形式。研究结果表明:当子弹以较高速度撞击双箭头负泊松比结构时,该结构的负泊松比效应不显著;顶边撞击与铰点撞击时,子弹直接贯穿结构,胞元破坏较小,此时双箭头负泊松比多胞结构抗侵彻性能较差;侧边撞击时,子弹未贯穿多胞结构,胞元破坏较大,双箭头负泊松比结构依靠其双三角结构使子弹发生偏转,显著增大了其侵彻阻力。分析了顶边撞击时子弹的入射角度变化对于双箭头负泊松比结构抗侵彻性能的影响,发现存在30°入射角和60°入射角。当子弹处于这两种入射角附近时,双箭头负泊松比多胞结构具有一定的抗侵彻能力。关键词:多胞材料;负泊松比;结构响应;局部侵彻中图分类号:O342;TB383;TJ03文献标志码:A文章编号:1001-2486(2023)02-197-11Ballisticperformanceofdouble-arrownegativePoisson'sratiostructureLIUYangzuo,MADawei,RENJie,ZHONGJianlin,ZHAOChangfang(SchoolofMechanicalEngineering,NanjingUniversityofScienceandTechnology,Nanjing210094,China)Abstract:Thepenetrationperformanceofthedouble-arrownegativePoisson'sratiomulticellularstructureagainstbulletpenetrationwasstudiedbynumericalsimulationmethod.Thepenetrationbehaviorsofbulletsandthedamageformsofthedouble-arrownegativePoisson'sratiostructureunderthethreebullettargetconditionsoftop-edgeimpact,hinge-pointimpactandside-impactwerecomparedandanalyzed.TheresultsshowthatthenegativePoisson'sratioeffectofthedouble-arrownegativePoisson'sratiostructureisnotsignificantwhenthebulletimpactsthestructureatahighvelocity.Thebulletdirectlypenetratesthestructureattopsideimpactandhingepointimpact,thedamageofthecellelementissmallandtheanti-intrusionperformanceofthedouble-arrownegativePoisson'sratiomulti-cellstructureispooratthistime.Thebulletdo...