Zhao Ming, Jin Haibo, Yun Zhaoxin, Meng Zhengwei, Zhang Wei
China Special Aircraft Research Institute, Jingmen 448035, China.
Department of Aircraft, Astronautics College of Aerospace Engineering, Nanjing University of Aeronautics, Nanjing 210001, China.
Polymers (Basel). 2024 Sep 1;16(17):2497. doi: 10.3390/polym16172497.
Since carbon fibre composite sandwich structures have high specific strength and specific modulus, which can meet the requirements for the development of aircraft technology, more and more extensive attention has been paid to their residual mechanical properties after subjecting them to fatigue loading in hygrothermal environments. In this paper, the compression and shear characteristics of carbon fibre-reinforced epoxy composite honeycomb sandwich wall panels after fatigue in hygrothermal environments are investigated through experiments. The experimental results show that under compressive loading, the load required for the buckling of composite honeycomb sandwich wall panels after fatigue loading in hygrothermal environments decreases by 25.9% and the damage load decreases by 10.5% compared to those at room temperature. Under shear loading, the load required for buckling to occur is reduced by 26.2% and the breaking load by 12.2% compared to those at room temperature.
由于碳纤维复合材料夹层结构具有较高的比强度和比模量，能够满足飞机技术发展的要求，因此其在湿热环境下承受疲劳载荷后的残余力学性能受到了越来越广泛的关注。本文通过实验研究了碳纤维增强环氧复合材料蜂窝夹层墙板在湿热环境下疲劳后的压缩和剪切特性。实验结果表明，在压缩载荷下，与室温相比，复合材料蜂窝夹层墙板在湿热环境下疲劳载荷后发生屈曲所需的载荷降低了25.9%，损伤载荷降低了10.5%。在剪切载荷下，与室温相比，发生屈曲所需的载荷降低了26.2%，破坏载荷降低了12.2%。
