Numerical modelling and design of ALFC shield loaded by 20 MM FSP fragment
Numerical modelling and design of ALFC shield loaded by 20 MM FSP fragment
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20MM FSP破片加载ALFC盾构的数值建模与设计
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
A. Morka
中科院分区：
文献类型：
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作者：
M. Klasztorny;M. Świerczewski;P. Dziewulski;A. Morka
该研究开发了ALFC屏蔽的数值建模和设计，该屏蔽由20 mm 54 g FSP碎片以1800 m/s的撞击速度移动（IED装置的碎裂模拟），用于保护5 mm厚的Armox 500 T钢板。ALFC屏蔽层由ALF吸能子系统和99.7%Al2O3氧化铝陶瓷层组成。ALF子系统设计用于吸收高达10 kg TNT的爆炸材料引起的爆炸波冲击能量。陶瓷层旨在阻止FSP碎片。5毫米厚的Armox 500 T钢板反映了轻型装甲车的车身底部。本研究的主要目的是确定5 mm厚Armox 500 T钢板完全不穿孔时陶瓷层的最小厚度。ALF子系统具有以下分层结构：Al 2024铝合金板、SCACS混合层压板、ALPORAS泡沫铝、SCACS混合层压板。这些层用Soudaseal 2K chemoset胶连接。SCACS混合层压板包含以下组分：VE 11-M改性乙烯基酯树脂（基质）、SWR 800玻璃S平纹织物、Tenax HTA 40 6 K碳平纹织物、Kevlar 49 T 968芳纶平纹织物。ALF盾构的总厚度为76 mm。在数值模拟中，铝合金板和Armox 500 T钢板均按Johnson-Cook模型在弹塑性范围内工作。根据JH-2 Johnson-Holmquist模型，99.7%Al2O3氧化铝陶瓷在弹性短程内工作。模拟对应于系统的所有部件之间的大位移、大变形和接触。有限元网格采用8节点24自由度单积分六面体单元。已经应用了额外的失效标准来管理有限元的特设腐蚀。使用Catia、HyperMesh、LS-DYNA和LS-PrePost系统进行了有限元建模、仿真和后处理。模拟结果以位移-穿孔等值线和FSP-屏蔽板和FSP-板系统的FSP最终变形的形式呈现。已经指出，18 mm厚的陶瓷层保护LAV车身底板不被穿孔。
The study develops numerical modelling and design of the ALFC shield loaded by the 20 mm 54 g FSP fragment moving at impact velocity of 1800 m/s (fragmentation simulation of IED devices), used to protect 5 mm-thick Armox 500T steel plate. The ALFC shield is composed of the ALF energy-absorbing subsystem and a 99.7% Al 2O3 alumina ceramic layer. The ALF subsystem is designed to absorb blast wave impact energy induced by explosive materials up to 10 kg TNT. The ceramic layer is aimed at stopping FSP fragments. The 5 mm-thick Armox 500T steel plate reflects the body bottom segment of a light armoured vehicle. The main purpose of the study is to determine the minimum thickness of the ceramic layer at which the 5 mm-thick Armox 500T steel plate is fully protected from perforation. The ALF subsystem has the following layered structure: Al2024 aluminium alloy plate, SCACS hybrid laminate plate, ALPORAS aluminium foam, SCACS hybrid laminate plate. The layers are joined with Soudaseal 2K chemoset glue. SCACS hybrid laminate contains the following components: VE 11-M modified vinylester resin (matrix), SWR800 glass S plain weave fabric, Tenax HTA40 6K carbon plain weave fabric, Kevlar 49 T 968 aramid plain weave fabric. The total thickness of the ALF shield amounts to 76 mm. In the numerical modelling, the aluminium alloy plate and Armox 500T steel plate are working in the elasto-plastic range according to Johnson–Cook model. The 99.7% Al 2O3 alumina ceramic is working in elasto-short range according to JH-2 Johnson–Holmquist model. The simulations correspond to large displacements, large deformations and contact among all the components of the system. In FE mesh, the 8-node 24 DOF hexahedral finite elements with single integration point have been used. Additional failure criteria governing ad-hoc erosion of finite elements have been applied. The FEM modelling, simulation and postprocessing have been carried out using Catia, HyperMesh, LS-DYNA and LS-PrePost systems. The simulation results are presented in the form of displacement – perforation contours and the FSP final deformation for both the FSP–shield–plate and the FSP–plate systems. It has been pointed out that 18 mm-thick ceramic layer protects the LAV body bottom plate from perforation.