Fang Yuting, Sheng Dongfa, Lin Zhongzhao, Fei Peng
School of Civil Engineering, Southwest Forestry University, Kunming 650224, China.
Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming 650224, China.
Polymers (Basel). 2024 Jan 6;16(2):173. doi: 10.3390/polym16020173.
In this paper, the low-velocity impact behavior and damage modes of carbon/glass-hybrid fiber-reinforced magnesium alloy laminates (FMLs-H) and pure carbon-fiber-reinforced magnesium alloy laminates (FMLs-C) are investigated using experimental, theoretical modeling, and numerical simulation methods. Low-velocity impact tests were conducted at incident energies of 20 J, 40 J, and 60 J using a drop-weight impact tester, and the load-displacement curves and energy-time curves of the FMLs were recorded and plotted. The results showed that compared with FMLs-C, the stiffness of FMLs-H was slightly reduced, but the peak load and energy absorption were both greatly improved. Finally, a finite element model based on the Abaqus-VUMAT subroutine was developed to simulate the experimental results, and the damage modes of the metal layer, fiber layer, and interlayer were observed and analyzed. The experimental results are in good agreement with the finite element analysis results. The damage mechanisms of two kinds of FMLs under low-velocity impacts are discussed, providing a reference for the design and application of laminates.
本文采用实验、理论建模和数值模拟方法，研究了碳/玻璃混杂纤维增强镁合金层合板（FMLs-H）和纯碳纤维增强镁合金层合板（FMLs-C）的低速冲击行为及损伤模式。使用落锤冲击试验机在20 J、40 J和60 J的入射能量下进行了低速冲击试验，并记录和绘制了FMLs的载荷-位移曲线和能量-时间曲线。结果表明，与FMLs-C相比，FMLs-H的刚度略有降低，但峰值载荷和能量吸收均有显著提高。最后，基于Abaqus-VUMAT子程序开发了有限元模型来模拟实验结果，并观察和分析了金属层、纤维层和中间层的损伤模式。实验结果与有限元分析结果吻合良好。讨论了两种FMLs在低速冲击下的损伤机制，为层合板的设计和应用提供了参考。
