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

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

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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 pro-tective performance is attributed to better dynamic properties and more outstanding energy absorption capability of the composite foam.

Ballistic behaviorComposite foamShear stiffening gelFinite element analysisProtective mechanism

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

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Key Laboratory for Mechanics in Fluid Solid Coupling Systems,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China

School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China

School of Mechanical Engineering,Northwestern Polytechnical University,Xi'an 710072,China

Xi'an Institute of Electromechanical Information Technology,Xi'an 710065,China

Science and Technology on Transient Impact Laboratory,Beijing 102202,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology on Transient Impact LaboratoryBeijing Municipal Science and Technology Commission

12072356122320206142606221105Z221100005822006

2024

10.1016/j.dt.2023.10.001

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.32(2)
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