泡沫铝夹芯板的低速冲击行为与仿真模拟

Low-velocity impact behavior and simulation of aluminum foam sandwich panels

采用包套轧制-粉末冶金发泡工艺,制备了具有冶金结合界面的三明治型闭孔泡沫铝夹芯板;通过落锤冲击实验,研究了在不同的冲击能量和面板厚度下泡沫铝夹芯板的冲击损伤过程.结果表明:当冲击能量由60 J增加到120 J时,峰值载荷由5998.55 N增加到6502.86 N,增幅达8.41%,基体损伤区域增大;当冲击能量为90 J时,可通过适当增加上、下面板的厚度来提高泡沫铝夹芯板的抗冲击性能.利用有限元软件ABAQUS建立了泡沫铝夹芯板低速冲击过程的数值模型,并通过实验结果验证了数值计算结果的可靠性,为设计新型的轻质、高抗冲击性能泡沫铝夹芯结构提供了理论依据.

A closed-cell aluminum foam sandwich panel with metallurgical bonding at the face/core layer interface was prepared by the method of wrapping rolling and powder metallurgy foaming.Impact damage processes under different impact energies and different panel thicknesses were studied by drop weight impact test.The results showed that as the impact energy increased from 60 J to 120 J,the peak load increased from 5998.55 N to 6502.86 N with an increasing rate of 8.41%,and the damage area of the matrix accordingly increased.When the same impact energy of 90 J was selected,the impact resistance of aluminum foam sandwich panel could be improved by increasing the thicknesses of the upper and lower panels.The numerical model of the low-velocity impact process of the aluminum foam sandwich panel was established by the finite element software ABAQUS,and the reliability of the numerical calculation results was verified by the experimental results.The simulated result will provide theory and reference for the physical design of the new lightweight aluminum foam sandwich panel with high impact resistance.