Protective performance of shear stiffening gel-modified foam against ballistic impact:Experimental and numerical study  

作　　者：Huan Tu Haowei Yang Pengzhao Xu Zhe Yang Fan Tang Cheng Dong Yuchao Chen Lei Ren Wenjian Cao Chenguang Huang Yacong Guo Yanpeng Wei 

机构地区：[1]Key Laboratory for Mechanics in Fluid Solid Coupling Systems,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China [3]Xi'an Institute of Electromechanical Information Technology,Xi'an 710065,China [4]Science and Technology on Transient Impact Laboratory,Beijing 102202,China [5]School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Defence Technology（防务技术）》2024年第2期510-520,共11页Defence Technology

基　　金：the National Natural Science Foundation of China(Grant Nos.12072356 and 12232020);the Science and Technology on Transient Impact Laboratory(Grant No.6142606221105);the Beijing Municipal Science and Technology Commission(Grant No.Z221100005822006).

摘　　要：As one of the most widely used personal protective equipment(PPE),body armors play an important role in protecting the human body from the high-velocity impact of bullets or projectiles.The body torso and critical organs of the wear may suffer severe behind-armor blunt trauma(BABT)even though the impactor is stopped by the body armor.A type of novel composite material through incorporating shear stiffening gel(STG)into ethylene-vinyl acetate(EVA)foam is developed and used as buffer layers to reduce BABT.In this paper,the protective performance of body armors composed of fabric bulletproof layers and a buffer layer made of foam material is investigated both experimentally and numerically.The effectiveness of STG-modified EVA in damage relief is verified by ballistic tests.In parallel with the experimental study,numerical simulations are conducted by LS-DYNA®to investigate the dynamic response of each component and capture the key mechanical parameters,which are hardly obtained from field tests.To fully describe the material behavior under the transient impact,the selected constitutive models take the failure and strain rate effect into consideration.A good agreement between the experimental observations and numerical results is achieved to prove the validity of the modelling method.The tests and simulations show that the impact-induced deformation on the human body is significantly reduced by using STG-modified EVA as the buffering material.The improvement of protective performance is attributed to better dynamic properties and more outstanding energy absorption capability of the composite foam.

关 键 词：Ballistic behavior Composite foam Shear stiffening gel Finite element analysis Protective mechanism 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术] TS941.73[轻工技术与工程—服装设计与工程]