管束集装箱Ⅳ型储氢瓶筒体CFRP层抗弹冲击数值模拟

Numerical Simulation of Ballistic Impact Resistance of CFRP Layers of Type Ⅳ Hydrogen Storage Cylinder in the Tube-bundle Container

利用Abaqus/Explicit有限元仿真软件建立了管束集装箱Ⅳ型储氢瓶筒体碳纤维增强复合材料(CFRP)层子弹冲击模型,重点探讨了当子弹以不同冲击初始速度穿透均衡CFRP储氢瓶筒体时的纤维缠绕角度与筒体CFRP层抗弹冲击性能的变化规律。结果表明:在模拟条件下,当子弹以250~500 m/s的较低速度冲击储氢瓶筒体时,筒体CFRP层抗弹冲击性能伴随纤维缠绕角度的递增呈现先增强后减弱的趋势,在缠绕角度为±45°左右时的筒体CFRP层抗弹冲击性能最好;当子弹以500~850 m/s的较高速度冲击筒体时,筒体CFRP层抗弹冲击性能同纤维缠绕角度的关系不明显。该研究可为管束集装箱Ⅳ型储氢瓶的抗冲击设计及优化提供参考。

The model of bullet penetrating carbon fiber reinforced plastics(CFRP)layers of type Ⅳ hydrogen storage cylinder in the tube-bundle container was established by the Abaqus/Explicit finite element software.It was focused on the relationship between the fiber winding angle and the ballistic impact resistance of CFRP layers of type Ⅳ hydrogen storage cylinder when the bullet penetrated the cylinder of the balanced layers at different initial impact speeds.The results show that under the simulated conditions, the CFRP layers’ ballistic impact resistance could first increase and then decrease with the increase of the fiber winding angle when the bullet penetrates the cylinder at a relatively low velocity of 250~500 m/s, and ballistic impact resistance is the best when the fiber winding angle is about ±45°.The relationship between ballistic impact resistance and the winding angle of the fiber is not obvious when the bullet penetrates the cylinder at a higher speed of 500~850 m/s.This research can provide a reference for the design and optimization of the impact resistance of type Ⅳ hydrogen storage cylinders in the tube-bundle container.