超高分子量聚乙烯纤维层合板在斜侵彻下的动态响应与失效行为研究  

Dynamic Response and Failure Behavior of UHMWPE Laminated Plates Under Oblique Impact of Projectile

作　　者：周熠[1,2] 郑冰倩 王昕 强鹭升[4] 张瑞 ZHOU Yi;ZHENG Bingqian;WANG Xin;QIANG Lusheng;ZHANG Rui(State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan,Hubei 430200,China;School of Textile Science and Engineering,Wuhan Textile University,Wuhan,Hubei 430200,China;Center for Advanced Materials and Energy,China Academy of Aerospace Science and Innovation,Beijing 100176,China;State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 210016,China)

机构地区：[1]武汉纺织大学纺织新材料与先进加工技术国家重点实验室,湖北武汉430200 [2]武汉纺织大学纺织科学与工程学院,湖北武汉430200 [3]中国航天科技创新研究院先进材料与能源中心,北京100176 [4]南京航空航天大学航空航天结构力学及控制全国重点实验室,江苏南京210016

出　　处：《北京理工大学学报》2024年第11期1138-1147,共10页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(12302187);湖北省自然科学基金青年资助项目(2023AFB092);武汉市知识创新专项项目(202201080102)。

摘　　要：为了研究弹丸斜入射下超高分子量聚乙烯(ultra-high molecular weight polyethylene,UHMWPE)纤维层合板的抗侵彻响应,分别在0°、10°与20°的入射角下开展了弹道冲击实验,利用高速摄影捕捉动态响应,并在冲击实验后观察破坏形貌.构建了相应的三维有限元计算模型,通过对比实验结果验证了其可靠性,并基于该数值模型,进一步阐明不同入射角下的UHMWPE纤维层合板抗侵彻机理.结果表明:当层合板受到平头弹丸斜侵彻作用时,弹头局部接触所引发的应力集中使得层合板更容易发生强度失效,但由于层合板的等效厚度增加且弹丸偏转所造成的弹体与层合板接触面积增加,使得入射角的影响与弹丸入射速度有关.当入射速度较低时,层合板的抗侵彻性能随着入射角增大而略微减小;而当入射速度远大于弹道极限时,层合板的抗侵彻性能随着入射角增大而增大.To investigate the penetration response of ultra-high molecular weight polyethylene(UHMWPE)lam-inated plates under oblique projectile impacts,ballistic impact experiments at impact angles of 0°,10°,and 20°were carried out.Firstly,the dynamic response was studied based on high-speed photography,and the failure form was analyzed after impact experiments.And then,a 3D finite element calculation model was constructed and validated with experiment results to analyze its reliability and the mechanism of UHMWPE laminated plates at different impact angles.The results show that,impacting with a flat cobra under projectile penetration,the laminated plate fiber can occur easily intension failure around projectile nose due to the stress concentration res-ulted from local contact increases.However,increased the equivalent thickness of the laminated plates and the contact area between the projectile and the laminate resulted in projectile deflection,the method can also make the influence of impact angle directly to relate with projectile impact speed.At low impact velocities,the penet-ration resistance can decrease with increasing impact angle.Contrarily,when the impact velocity of the ballistic is arranged to exceed greatly its limit,the penetration resistance can increase with the impact angle.

关 键 词：斜侵彻 超高分子量聚乙烯纤维层合板 抗侵彻性能 入射角 

分 类 号：O385[理学—流体力学]