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Bionic stab-resistant body armor based on triangular pyramid structure

Defence Technology（防务技术） 2021年第3期17卷 792-799页

作者： Ya-xin Guo Meng-qi Yuan Xin-ming Qian State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China

A stab-resistant substrate was designed and realized with a triangular pyramidal structure, inspired by the biological armor model in nature. The stab-resistance behavior and dynamic response mechanisms were studied through numerical simulation and experimental testing of a knife impacting a substrate,and an optimal structural design was obtained accordingly, with a tilted angle of 22.5and optimal thickness of 1.2 mm. It was shown that the triangular pyramidal structure generated twice the internal energy of the knife than the flat substrate due to the dispersing effect of the structure. The force parallel to the inclination caused a significant scratch on the substrate surface, while the force perpendicular caused obvious substrate deformation. A new riveting method was used to form the total layer, which passed the GA 68-2008 standard. The stab-resistant clothing coupled with the reduced wearing burden could provide effective protection and avoid fatal injuries on security personnel working in dangerous environments. The method provided may enlighten the future design and manufacturing of stabresistant clothing.

关键词： Stab resistant Impact behavior body armor Finite element analysis

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维普期刊数据库

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Critical interfaces in body armour systems

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Defence Technology（防务技术） 2021年第6期17卷 1887-1894页

作者： Ian G.Crouch Ulverston Armour Solutions UlverstonLA127BJCumbriaUK

The ballistic performance,and behaviour,of an armour system is governed by two major sets of variables,geometrical and *** these,the consistency of performance,especially against small arms ammunition,will depend upon the consistency of the properties of the constituent *** a body armour system for example,fibre diameter,areal density of woven fabric,and bulk density of ceramic are examples of critical parameters and monitoring such parameters will form the backbone of associated quality control *** is often overlooked,because it can fall into the User’s domain,are the interfaces that exist between the various products;the carrier,the Soft Armour Insert(SAI),and the one or two hard armour plates(HAP1 and HAP2).This is especially true if the various products are sourced from different suppliers.

关键词： Interfaces body armour body armor Ceramic armour UHMWPE Aramids Ballistic fibres Fabrics Interfacial materials Hard armour plates Soft vests

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维普期刊数据库

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Experimental study of transient pressure wave in the behind armor blunt trauma induced by different rifle bullets

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Defence Technology（防务技术） 2020年第4期16卷 900-909页

作者： Rui-guo Han Yong-jie Qu Wen-min Yan Bin Qin Shu Wang Jian-zhong Wang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081PR China Science and Technology on Transient Impact Laboratory Beijing102202PR China

Pressure wave plays an important role in the occurrence of behind armor blunt trauma(BABT),and ballistic gelatin is widely used as a surrogate of biological tissue in the research of *** of pressure wave in the gelatin behind armor for different rifle bullets is *** aim of this study was to observe dynamic changes in pressure wave induced by ballistic blunt impact on the armored gelatin block and to compare the effects of bullet type on the parameters of the transient pressure *** gelatin blocks protected with National Institute of Justice(NIJ) class III bulletproof armor were shot by three types of rifle bullet with the same level of impact *** transient pressure signals at five locations were recorded with pressure sensors and three parameters(maximum pressure,maximum pressure impulse,and the duration of the first positive phase) were determined and *** results indicated that the waveform and the twin peak of transient pressure wave were not related to the bullet ***,the values of pressure wave's parameters were significantly affected by bullet ***,the attenuation of pressure amplitude followed the similar law for the three *** findings may be helpful to get some insight in the BABT and improve the structure design of bullet.

关键词： Behind armor blunt trauma Ballistic gelatin Pressure wave body armor

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