Research On Lightweight Design Of Bulletproof Vehicle Body Based On Fiber Composite Material

In order to meet the requirements of modern battlefield for lightweight and highly maneuverable tactical vehicles,vehicle body armor is required to have both safety and high maneuverability.Therefore,improving the bulletproof performance of vehicle body armor and developing lightweight armor are the main research directions at present.In this paper,bulletproof steel and bullet-proof fiber material are taken as the main research objects,and the design of bullet-proof lightweight armor based on fiber composite material is carried out.The design objective is to 7.62 mm ordinary bullet as the threat target,using bulletproof steel,UHMWPE fiber,Kevlar fiber and glass fiber four materials to carry out the design and research of lightweight composite armor.Firstly,the constitutive models of different bulletproof materials are studied and the basic effects of relevant material parameters on bulletproof performance are understood.Then the protection principle of different materials is studied,and the related evaluation indexes and test standards are put forward.After that,the finite element model of bullet penetrating target plate is modeled and simulated,and the accuracy of the finite element model is verified by comparison with the results of live ammunition to ensure that the simulation can reflect the reality.On this basis,the influence factors on the bulletproof performance of composite armor are studied by simulation analysis.It is found that UHMWPE fiber and aramid fiber composite target have the best bulletproof performance.Backplane material will support the panel.The thicker the backplane,the more bulletproof performance of the panel will be improved.The bulletproof property between the composite material and the bulletproof steel is better when the composite material is bonded by resin than when the bolt is connected.Referring to the analysis results,the armor structure design scheme of bulletproof steel +UHMWPE fiber + Kevlar fiber was proposed and optimized.Finally,the adaptability of composite armor body and original body is studied by analyzing the bending stiffness of composite armor body and original body.