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Property Research and Design of Interply Hybrid Composite and Numerical Simulation Research of Resisitance Performance

Author: ZhaoWei
Tutor: ZhangDongXing
School: Harbin Institute of Technology
Course: Materials Science
Keywords: composite materials finite element simulation fibers of Kevlar protectivedeck
CLC: TB332
Type: Master's thesis
Year: 2012
Downloads: 53
Quote: 0
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Abstract


The shelter,which is applied to battle command,defense, observation, shootingand so on in modern war, is still the valid comprehensive military buildup. The portholeof shelter that encircles thick reinforced concrete all around often becomes the weakpoint. Its protection ability determines internal personnel security. This paper is focusedon how to choose protective material, the theoretical analysis of the model and thebullet impact bunkers protection deck by finite element simulation, which is aimed atstudying the protect ability against light weapons.By the comparative studying of four different fiber material properties andconsidering the fiber hybrid effect, comprehensive performance Kevlar fiber waschosen as main reinforced materials and S-2glass fiber is chosen as secondaryreinforced materials. Al2O3ceramic is widely used as protective deck of the panel due toits excellent cost performance. The epoxy resin was chosen as matrix considering therigid and process maturity characteristics.This paper analyzed the residual stress of the ceramic and Kevlar fiber in theorymodel. The compression stress, which is formed under the action of ceramic cone, candamage the bullet. The increase of fiber content and intersection of the node reflects theincreased stress wave. To improve the wave velocity can absorb more energy, whichimproves the performance of the whole protection deck.The impact of the bullet Kevlar composite/ceramic deck was studied by theABAQUS finite element simulation software. The stress and energy change wereresearched during the projectile penetrating deck process, and the results wereconsistent with the theory analysis. Different quantitative values were compared bychanging the different parameters such as fiber layer angle, hybrid ratio of fibers and thenumber of fiber layer. Under the condition of invariable deck thickness, the protectionproperties increased with the fiber layer number. Both S-2glass fiber and Kevlar fiberhave the best hybrid proportion range0.30.7, and0°/30°/60°/90°/-60°/-30°/0°is the best interval piles angle, which has the best protective effect.According to the finite element simulation, structure of the bunker protection deckwas designed. The ABAQUS software was used for the impact resistance numerical simulation, and the results showed that6mm thick Kevlar composite/ceramic armor canresist the penetration of flat-node projectile with initial velocity of500m/s, whichsatisfied the theoretical predictions.

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Non-metallic composite materials
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